Cycling of Matter and Energy in Ecosystems - Middle School Life Science
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Which of these organisms uses energy from the sun to make its own food?
Which of these organisms uses energy from the sun to make its own food?
The answer is both of these.
Photosynthesis is the process where plants use energy from the sun to create their own food. This is why plants are referred to as producers. In the process of photosynthesis, the energy from sunlight, carbon dioxide, and water are converted into sugar and oxygen through chemical reactions in plant cells. Animals do not produce their own energy, but have to eat plants or other animals to stay alive. Animals breathe in the oxygen created by photosynthesis and exhale carbon dioxide as a product through their own process called cellular respiration.
The answer is both of these.
Photosynthesis is the process where plants use energy from the sun to create their own food. This is why plants are referred to as producers. In the process of photosynthesis, the energy from sunlight, carbon dioxide, and water are converted into sugar and oxygen through chemical reactions in plant cells. Animals do not produce their own energy, but have to eat plants or other animals to stay alive. Animals breathe in the oxygen created by photosynthesis and exhale carbon dioxide as a product through their own process called cellular respiration.
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What process in the hydrological cycle returns water back to lakes, oceans, and rivers from the atmosphere?
What process in the hydrological cycle returns water back to lakes, oceans, and rivers from the atmosphere?
The answer is "precipitation."
The water cycle, also called the hydrological cycle, describes the flow of water on Earth. Most of Earth’s water exists in the oceans. Some important processes in the water cycle are precipitation, evaporation, condensation, runoff, and sublimation or deposition. Water evaporates from the ocean, condenses in clouds, and rains down (precipitates) back to the Earth, where it is collected in oceans or as runoff in rivers and streams that lead back to the oceans.
Only about 3% of Earth’s water is freshwater, and most of that is frozen in glaciers rather than available to us in lakes, rivers, or groundwater stores. Snow melt is a form of runoff but some snow can return to the atmosphere through a process called sublimation, and back to snow from a gaseous state through deposition.
The answer is "precipitation."
The water cycle, also called the hydrological cycle, describes the flow of water on Earth. Most of Earth’s water exists in the oceans. Some important processes in the water cycle are precipitation, evaporation, condensation, runoff, and sublimation or deposition. Water evaporates from the ocean, condenses in clouds, and rains down (precipitates) back to the Earth, where it is collected in oceans or as runoff in rivers and streams that lead back to the oceans.
Only about 3% of Earth’s water is freshwater, and most of that is frozen in glaciers rather than available to us in lakes, rivers, or groundwater stores. Snow melt is a form of runoff but some snow can return to the atmosphere through a process called sublimation, and back to snow from a gaseous state through deposition.
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Which of these are products in the chemical equation for photosynthesis?
Which of these are products in the chemical equation for photosynthesis?
The answer is C6H12O6 and O2.
The answer is C6H12O6 and O2.
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Where does most of Earth's water exist?
Where does most of Earth's water exist?
The answer is "in the oceans."
The water cycle, also called the hydrological cycle, describes the flow of water on Earth. Most of Earth’s water exists in the oceans. Some important processes in the water cycle are precipitation, evaporation, condensation, runoff, and sublimation or deposition. Water evaporates from the ocean, condenses in clouds, and rains down (precipitates) back to the Earth, where it is collected in oceans or as runoff in rivers and streams that lead back to the oceans.
Only about 3% of Earth’s water is freshwater, and most of that is frozen in glaciers rather than available to us in lakes, rivers, or groundwater stores. Snow melt is a form of runoff but some snow can return to the atmosphere through a process called sublimation, and back to snow from a gaseous state through deposition.
The answer is "in the oceans."
The water cycle, also called the hydrological cycle, describes the flow of water on Earth. Most of Earth’s water exists in the oceans. Some important processes in the water cycle are precipitation, evaporation, condensation, runoff, and sublimation or deposition. Water evaporates from the ocean, condenses in clouds, and rains down (precipitates) back to the Earth, where it is collected in oceans or as runoff in rivers and streams that lead back to the oceans.
Only about 3% of Earth’s water is freshwater, and most of that is frozen in glaciers rather than available to us in lakes, rivers, or groundwater stores. Snow melt is a form of runoff but some snow can return to the atmosphere through a process called sublimation, and back to snow from a gaseous state through deposition.
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Which of these is NOT a process in the water cycle?
Which of these is NOT a process in the water cycle?
The answer is "denitrification."
The water cycle, also called the hydrological cycle, describes the flow of water on Earth. Most of Earth’s water exists in the oceans. Some important processes in the water cycle are precipitation, evaporation, condensation, runoff, and sublimation or deposition. Water evaporates from the ocean, condenses in clouds, and rains down (precipitates) back to the Earth, where it is collected in oceans or as runoff in rivers and streams that lead back to the oceans.
Only about 3% of Earth’s water is freshwater, and most of that is frozen in glaciers rather than available to us in lakes, rivers, or groundwater stores. Snow melt is a form of runoff but some snow can return to the atmosphere through a process called sublimation, and back to snow from a gaseous state through deposition.
The answer is "denitrification."
The water cycle, also called the hydrological cycle, describes the flow of water on Earth. Most of Earth’s water exists in the oceans. Some important processes in the water cycle are precipitation, evaporation, condensation, runoff, and sublimation or deposition. Water evaporates from the ocean, condenses in clouds, and rains down (precipitates) back to the Earth, where it is collected in oceans or as runoff in rivers and streams that lead back to the oceans.
Only about 3% of Earth’s water is freshwater, and most of that is frozen in glaciers rather than available to us in lakes, rivers, or groundwater stores. Snow melt is a form of runoff but some snow can return to the atmosphere through a process called sublimation, and back to snow from a gaseous state through deposition.
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About how much of Earth's water is fresh water?
About how much of Earth's water is fresh water?
The answer is "3%"
The water cycle, also called the hydrological cycle, describes the flow of water on Earth. Most of Earth’s water exists in the oceans. Some important processes in the water cycle are precipitation, evaporation, condensation, runoff, and sublimation or deposition. Water evaporates from the ocean, condenses in clouds, and rains down (precipitates) back to the Earth, where it is collected in oceans or as runoff in rivers and streams that lead back to the oceans.
Only about 3% of Earth’s water is freshwater, and most of that is frozen in glaciers rather than available to us in lakes, rivers, or groundwater stores. Snow melt is a form of runoff but some snow can return to the atmosphere through a process called sublimation, and back to snow from a gaseous state through deposition.
The answer is "3%"
The water cycle, also called the hydrological cycle, describes the flow of water on Earth. Most of Earth’s water exists in the oceans. Some important processes in the water cycle are precipitation, evaporation, condensation, runoff, and sublimation or deposition. Water evaporates from the ocean, condenses in clouds, and rains down (precipitates) back to the Earth, where it is collected in oceans or as runoff in rivers and streams that lead back to the oceans.
Only about 3% of Earth’s water is freshwater, and most of that is frozen in glaciers rather than available to us in lakes, rivers, or groundwater stores. Snow melt is a form of runoff but some snow can return to the atmosphere through a process called sublimation, and back to snow from a gaseous state through deposition.
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Which of these shows the correct order of processes water will travel through if we begin to follow it as a rain drop?
Which of these shows the correct order of processes water will travel through if we begin to follow it as a rain drop?
The answer is "precipitation, runoff, collection, evaporation, condensation, precipitation."
The water cycle, also called the hydrological cycle, describes the flow of water on Earth. Most of Earth’s water exists in the oceans. Some important processes in the water cycle are precipitation, evaporation, condensation, runoff, and sublimation or deposition. Water evaporates from the ocean, condenses in clouds, and rains down (precipitates) back to the Earth, where it is collected in oceans or as runoff in rivers and streams that lead back to the oceans.
Only about 3% of Earth’s water is freshwater, and most of that is frozen in glaciers rather than available to us in lakes, rivers, or groundwater stores. Snow melt is a form of runoff but some snow can return to the atmosphere through a process called sublimation, and back to snow from a gaseous state through deposition.
The answer is "precipitation, runoff, collection, evaporation, condensation, precipitation."
The water cycle, also called the hydrological cycle, describes the flow of water on Earth. Most of Earth’s water exists in the oceans. Some important processes in the water cycle are precipitation, evaporation, condensation, runoff, and sublimation or deposition. Water evaporates from the ocean, condenses in clouds, and rains down (precipitates) back to the Earth, where it is collected in oceans or as runoff in rivers and streams that lead back to the oceans.
Only about 3% of Earth’s water is freshwater, and most of that is frozen in glaciers rather than available to us in lakes, rivers, or groundwater stores. Snow melt is a form of runoff but some snow can return to the atmosphere through a process called sublimation, and back to snow from a gaseous state through deposition.
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What is the name of the area underground that contains groundwater?
What is the name of the area underground that contains groundwater?
The answer is "an aquifer."
The water cycle, also called the hydrological cycle, describes the flow of water on Earth. Most of Earth’s water exists in the oceans. Some important processes in the water cycle are precipitation, evaporation, condensation, runoff, and sublimation or deposition. Water evaporates from the ocean, condenses in clouds, and rains down (precipitates) back to the Earth, where it is collected in oceans or as runoff in rivers and streams that lead back to the oceans.
Only about 3% of Earth’s water is freshwater, and most of that is frozen in glaciers rather than available to us in lakes, rivers, or groundwater stores. Snow melt is a form of runoff but some snow can return to the atmosphere through a process called sublimation, and back to snow from a gaseous state through deposition.
The answer is "an aquifer."
The water cycle, also called the hydrological cycle, describes the flow of water on Earth. Most of Earth’s water exists in the oceans. Some important processes in the water cycle are precipitation, evaporation, condensation, runoff, and sublimation or deposition. Water evaporates from the ocean, condenses in clouds, and rains down (precipitates) back to the Earth, where it is collected in oceans or as runoff in rivers and streams that lead back to the oceans.
Only about 3% of Earth’s water is freshwater, and most of that is frozen in glaciers rather than available to us in lakes, rivers, or groundwater stores. Snow melt is a form of runoff but some snow can return to the atmosphere through a process called sublimation, and back to snow from a gaseous state through deposition.
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Where does the energy that powers the hydrologic cycle originate from?
Where does the energy that powers the hydrologic cycle originate from?
The answer is "the sun."
The water cycle, also called the hydrological cycle, describes the flow of water on Earth. Most of Earth’s water exists in the oceans. Some important processes in the water cycle are precipitation, evaporation, condensation, runoff, and sublimation or deposition. Water evaporates from the ocean, condenses in clouds, and rains down (precipitates) back to the Earth, where it is collected in oceans or as runoff in rivers and streams that lead back to the oceans.
Only about 3% of Earth’s water is freshwater, and most of that is frozen in glaciers rather than available to us in lakes, rivers, or groundwater stores. Snow melt is a form of runoff but some snow can return to the atmosphere through a process called sublimation, and back to snow from a gaseous state through deposition.
The answer is "the sun."
The water cycle, also called the hydrological cycle, describes the flow of water on Earth. Most of Earth’s water exists in the oceans. Some important processes in the water cycle are precipitation, evaporation, condensation, runoff, and sublimation or deposition. Water evaporates from the ocean, condenses in clouds, and rains down (precipitates) back to the Earth, where it is collected in oceans or as runoff in rivers and streams that lead back to the oceans.
Only about 3% of Earth’s water is freshwater, and most of that is frozen in glaciers rather than available to us in lakes, rivers, or groundwater stores. Snow melt is a form of runoff but some snow can return to the atmosphere through a process called sublimation, and back to snow from a gaseous state through deposition.
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Where is most of Earth's fresh water?
Where is most of Earth's fresh water?
The answer is "frozen in glaciers."
The water cycle, also called the hydrological cycle, describes the flow of water on Earth. Most of Earth’s water exists in the oceans. Some important processes in the water cycle are precipitation, evaporation, condensation, runoff, and sublimation or deposition. Water evaporates from the ocean, condenses in clouds, and rains down (precipitates) back to the Earth, where it is collected in oceans or as runoff in rivers and streams that lead back to the oceans.
Only about 3% of Earth’s water is freshwater, and most of that is frozen in glaciers rather than available to us in lakes, rivers, or groundwater stores. Snow melt is a form of runoff but some snow can return to the atmosphere through a process called sublimation, and back to snow from a gaseous state through deposition.
The answer is "frozen in glaciers."
The water cycle, also called the hydrological cycle, describes the flow of water on Earth. Most of Earth’s water exists in the oceans. Some important processes in the water cycle are precipitation, evaporation, condensation, runoff, and sublimation or deposition. Water evaporates from the ocean, condenses in clouds, and rains down (precipitates) back to the Earth, where it is collected in oceans or as runoff in rivers and streams that lead back to the oceans.
Only about 3% of Earth’s water is freshwater, and most of that is frozen in glaciers rather than available to us in lakes, rivers, or groundwater stores. Snow melt is a form of runoff but some snow can return to the atmosphere through a process called sublimation, and back to snow from a gaseous state through deposition.
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What is the most effective way to increase the rate of evaporation of a body of water?
What is the most effective way to increase the rate of evaporation of a body of water?
The answer is "increasing the surface area" because there is more water being warmed at once.
The water cycle, also called the hydrological cycle, describes the flow of water on Earth. Most of Earth’s water exists in the oceans. Some important processes in the water cycle are precipitation, evaporation, condensation, runoff, and sublimation or deposition. Water evaporates from the ocean, condenses in clouds, and rains down (precipitates) back to the Earth, where it is collected in oceans or as runoff in rivers and streams that lead back to the oceans.
Only about 3% of Earth’s water is freshwater, and most of that is frozen in glaciers rather than available to us in lakes, rivers, or groundwater stores. Snow melt is a form of runoff but some snow can return to the atmosphere through a process called sublimation, and back to snow from a gaseous state through deposition.
The answer is "increasing the surface area" because there is more water being warmed at once.
The water cycle, also called the hydrological cycle, describes the flow of water on Earth. Most of Earth’s water exists in the oceans. Some important processes in the water cycle are precipitation, evaporation, condensation, runoff, and sublimation or deposition. Water evaporates from the ocean, condenses in clouds, and rains down (precipitates) back to the Earth, where it is collected in oceans or as runoff in rivers and streams that lead back to the oceans.
Only about 3% of Earth’s water is freshwater, and most of that is frozen in glaciers rather than available to us in lakes, rivers, or groundwater stores. Snow melt is a form of runoff but some snow can return to the atmosphere through a process called sublimation, and back to snow from a gaseous state through deposition.
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Which process describes the movement of water from leaves on a tree into the atmosphere?
Which process describes the movement of water from leaves on a tree into the atmosphere?
The answer is "transpiration."
The water cycle, also called the hydrological cycle, describes the flow of water on Earth. Most of Earth’s water exists in the oceans. Some important processes in the water cycle are precipitation, evaporation, condensation, runoff, and sublimation or deposition. Water evaporates from the ocean, condenses in clouds, and rains down (precipitates) back to the Earth, where it is collected in oceans or as runoff in rivers and streams that lead back to the oceans.
Only about 3% of Earth’s water is freshwater, and most of that is frozen in glaciers rather than available to us in lakes, rivers, or groundwater stores. Snow melt is a form of runoff but some snow can return to the atmosphere through a process called sublimation, and back to snow from a gaseous state through deposition.
The answer is "transpiration."
The water cycle, also called the hydrological cycle, describes the flow of water on Earth. Most of Earth’s water exists in the oceans. Some important processes in the water cycle are precipitation, evaporation, condensation, runoff, and sublimation or deposition. Water evaporates from the ocean, condenses in clouds, and rains down (precipitates) back to the Earth, where it is collected in oceans or as runoff in rivers and streams that lead back to the oceans.
Only about 3% of Earth’s water is freshwater, and most of that is frozen in glaciers rather than available to us in lakes, rivers, or groundwater stores. Snow melt is a form of runoff but some snow can return to the atmosphere through a process called sublimation, and back to snow from a gaseous state through deposition.
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Where is most carbon on Earth stored?
Where is most carbon on Earth stored?
The answer is "in rocks and sediments"
The carbon cycle describes the flow of the element Carbon in ecosystems. Most carbon is stored in rocks and sediments, while the rest is stored in the ocean, atmosphere, and living organisms. Carbon in the air is absorbed by plants in photosynthesis, consumed by organisms who eat the plants, and then it is returned to the soil when animals die and their organic matter decomposes. The same process happens in oceans with aquatic plants as well. Carbon is also emitted from the burning of fossil fuels which are made from the organic material of organisms that died millions of years ago.
The answer is "in rocks and sediments"
The carbon cycle describes the flow of the element Carbon in ecosystems. Most carbon is stored in rocks and sediments, while the rest is stored in the ocean, atmosphere, and living organisms. Carbon in the air is absorbed by plants in photosynthesis, consumed by organisms who eat the plants, and then it is returned to the soil when animals die and their organic matter decomposes. The same process happens in oceans with aquatic plants as well. Carbon is also emitted from the burning of fossil fuels which are made from the organic material of organisms that died millions of years ago.
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Carbon is absorbed from the atmosphere through what process?
Carbon is absorbed from the atmosphere through what process?
The answer is "photosynthesis."
The carbon cycle describes the flow of the element Carbon in ecosystems. Most carbon is stored in rocks and sediments, while the rest is stored in the ocean, atmosphere, and living organisms. Carbon in the air is absorbed by plants in photosynthesis, consumed by organisms who eat the plants, and then it is returned to the soil when animals die and their organic matter decomposes. The same process happens in oceans with aquatic plants as well. Carbon is also emitted from the burning of fossil fuels which are made from the organic material of organisms that died millions of years ago.
The answer is "photosynthesis."
The carbon cycle describes the flow of the element Carbon in ecosystems. Most carbon is stored in rocks and sediments, while the rest is stored in the ocean, atmosphere, and living organisms. Carbon in the air is absorbed by plants in photosynthesis, consumed by organisms who eat the plants, and then it is returned to the soil when animals die and their organic matter decomposes. The same process happens in oceans with aquatic plants as well. Carbon is also emitted from the burning of fossil fuels which are made from the organic material of organisms that died millions of years ago.
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Why are forests and areas where there are many plants referred to as "Carbon sinks"?
Why are forests and areas where there are many plants referred to as "Carbon sinks"?
The answer is "because plants absorb carbon in photosynthesis"
The carbon cycle describes the flow of the element Carbon in ecosystems. Most carbon is stored in rocks and sediments, while the rest is stored in the ocean, atmosphere, and living organisms. Carbon in the air is absorbed by plants in photosynthesis, consumed by organisms who eat the plants, and then it is returned to the soil when animals die and their organic matter decomposes. The same process happens in oceans with aquatic plants as well. Carbon is also emitted from the burning of fossil fuels which are made from the organic material of organisms that died millions of years ago.
The answer is "because plants absorb carbon in photosynthesis"
The carbon cycle describes the flow of the element Carbon in ecosystems. Most carbon is stored in rocks and sediments, while the rest is stored in the ocean, atmosphere, and living organisms. Carbon in the air is absorbed by plants in photosynthesis, consumed by organisms who eat the plants, and then it is returned to the soil when animals die and their organic matter decomposes. The same process happens in oceans with aquatic plants as well. Carbon is also emitted from the burning of fossil fuels which are made from the organic material of organisms that died millions of years ago.
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According to this diagram, how does Carbon travel to the atmosphere?
According to this diagram, how does Carbon travel to the atmosphere?
The answer is "all of these."
The carbon cycle describes the flow of the element Carbon in ecosystems. Most carbon is stored in rocks and sediments, while the rest is stored in the ocean, atmosphere, and living organisms. Carbon in the air is absorbed by plants in photosynthesis, consumed by organisms who eat the plants, and then it is returned to the soil when animals die and their organic matter decomposes. The same process happens in oceans with aquatic plants as well. Carbon is also emitted from the burning of fossil fuels which are made from the organic material of organisms that died millions of years ago.
The answer is "all of these."
The carbon cycle describes the flow of the element Carbon in ecosystems. Most carbon is stored in rocks and sediments, while the rest is stored in the ocean, atmosphere, and living organisms. Carbon in the air is absorbed by plants in photosynthesis, consumed by organisms who eat the plants, and then it is returned to the soil when animals die and their organic matter decomposes. The same process happens in oceans with aquatic plants as well. Carbon is also emitted from the burning of fossil fuels which are made from the organic material of organisms that died millions of years ago.
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How do heterotrophs acquire their carbon?
How do heterotrophs acquire their carbon?
The answer is "from eating autotrophs"
The carbon cycle describes the flow of the element Carbon in ecosystems. Most carbon is stored in rocks and sediments, while the rest is stored in the ocean, atmosphere, and living organisms. Carbon in the air is absorbed by plants in photosynthesis, consumed by organisms who eat the plants, and then it is returned to the soil when animals die and their organic matter decomposes. The same process happens in oceans with aquatic plants as well. Carbon is also emitted from the burning of fossil fuels which are made from the organic material of organisms that died millions of years ago.
The answer is "from eating autotrophs"
The carbon cycle describes the flow of the element Carbon in ecosystems. Most carbon is stored in rocks and sediments, while the rest is stored in the ocean, atmosphere, and living organisms. Carbon in the air is absorbed by plants in photosynthesis, consumed by organisms who eat the plants, and then it is returned to the soil when animals die and their organic matter decomposes. The same process happens in oceans with aquatic plants as well. Carbon is also emitted from the burning of fossil fuels which are made from the organic material of organisms that died millions of years ago.
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Which of the following answer choices best describes the 4 main components of the Carbon Cycle?
Which of the following answer choices best describes the 4 main components of the Carbon Cycle?
The answer is "Photosynthesis, Decomposition, Respiration and Combustion." The carbon cycle describes the flow of the element Carbon on Earth. Most carbon is stored in rocks and sediments, while the rest is stored in the ocean, atmosphere, and living organisms. Carbon in the air is absorbed by plants in photosynthesis, consumed by organisms who eat the plants, and then it is returned to the soil when animals die and their organic matter decomposes. The same process happens in oceans with aquatic plants as well. Carbon is also emitted from the burning of fossil fuels which are made from the organic material of organisms that died millions of years ago.
The answer is "Photosynthesis, Decomposition, Respiration and Combustion." The carbon cycle describes the flow of the element Carbon on Earth. Most carbon is stored in rocks and sediments, while the rest is stored in the ocean, atmosphere, and living organisms. Carbon in the air is absorbed by plants in photosynthesis, consumed by organisms who eat the plants, and then it is returned to the soil when animals die and their organic matter decomposes. The same process happens in oceans with aquatic plants as well. Carbon is also emitted from the burning of fossil fuels which are made from the organic material of organisms that died millions of years ago.
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Which of the following is NOT a part of the Carbon Cycle?
Which of the following is NOT a part of the Carbon Cycle?
The answer is "Carbon moves from the atmosphere into space." The Carbon Cycle is a closed system that operates on Earth and while some Carbon may move between Earth and space, that is not related to our Carbon Cycle. The carbon cycle describes the flow of the element Carbon on Earth. Most carbon is stored in rocks and sediments, while the rest is stored in the ocean, atmosphere, and living organisms. Carbon in the air is absorbed by plants in photosynthesis, consumed by organisms who eat the plants, and then it is returned to the soil when animals die and their organic matter decomposes. The same process happens in oceans with aquatic plants as well. Carbon is also emitted from the burning of fossil fuels which are made from the organic material of organisms that died millions of years ago.
The answer is "Carbon moves from the atmosphere into space." The Carbon Cycle is a closed system that operates on Earth and while some Carbon may move between Earth and space, that is not related to our Carbon Cycle. The carbon cycle describes the flow of the element Carbon on Earth. Most carbon is stored in rocks and sediments, while the rest is stored in the ocean, atmosphere, and living organisms. Carbon in the air is absorbed by plants in photosynthesis, consumed by organisms who eat the plants, and then it is returned to the soil when animals die and their organic matter decomposes. The same process happens in oceans with aquatic plants as well. Carbon is also emitted from the burning of fossil fuels which are made from the organic material of organisms that died millions of years ago.
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Which of the following correctly identifies the significance of Carbon on Earth?
Which of the following correctly identifies the significance of Carbon on Earth?
The answer is "all of these." The carbon cycle describes the flow of the element Carbon on Earth. Most carbon is stored in rocks and sediments, while the rest is stored in the ocean, atmosphere, and living organisms. Carbon in the air is absorbed by plants in photosynthesis, consumed by organisms who eat the plants, and then it is returned to the soil when animals die and their organic matter decomposes. The same process happens in oceans with aquatic plants as well. Carbon is also emitted from the burning of fossil fuels which are made from the organic material of organisms that died millions of years ago.
The answer is "all of these." The carbon cycle describes the flow of the element Carbon on Earth. Most carbon is stored in rocks and sediments, while the rest is stored in the ocean, atmosphere, and living organisms. Carbon in the air is absorbed by plants in photosynthesis, consumed by organisms who eat the plants, and then it is returned to the soil when animals die and their organic matter decomposes. The same process happens in oceans with aquatic plants as well. Carbon is also emitted from the burning of fossil fuels which are made from the organic material of organisms that died millions of years ago.
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