Middle School Life Science : Middle School Life Science
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Example Questions
Example Question #41 : Middle School Life Science
Where is most carbon on Earth stored?
in living organisms
in the atmosphere
in rocks and sediments (and dead organisms)
in the ocean
in rocks and sediments (and dead organisms)
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.
Example Question #42 : Middle School Life Science
Carbon is absorbed from the atmosphere through what process?
carbonic absorption
photosynthesis
cellular respiration
neutralization
photosynthesis
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.
Example Question #43 : Middle School Life Science
Why are forests and areas where there are many plants referred to as "Carbon sinks"?
because carbon is drained from plants by animals
because plants release carbon in the atmosphere like the faucet in a "sink"
because plants absorb carbon in photosynthesis and drain carbon from the atmosphere
because plants make carbon "sink" to the bottom of the Earth
because plants absorb carbon in photosynthesis and drain carbon from the atmosphere
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.
Example Question #44 : Middle School Life Science
According to this diagram, how does Carbon travel to the atmosphere?
all of these
the burning of fossil fuels and deforestation
ocean loss
volcanic emissions, plant respiration, and soil respiration
all of these
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.
Example Question #45 : Middle School Life Science
How do heterotrophs acquire their carbon?
from fossil fuels
from eating autotrophs
from the atmosphere
by digging in the ground
from eating autotrophs
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.
Example Question #46 : Middle School Life Science
Which of the following answer choices best describes the 4 main components of the Carbon Cycle?
Photosynthesis, Decomposition, Deforestation, and Respiration
Photosynthesis, Decomposition, Respiration and Recombination
Photosynthesis, Deforestation, Respiration and Restoration
Photosynthesis, Decomposition, Respiration and Combustion
Photosynthesis, Decomposition, Respiration and Combustion
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.
Example Question #47 : Middle School Life Science
Which of the following is NOT a part of the Carbon Cycle?
Carbon moves from fossil fuels to the atmosphere when fuels are burned
Carbon moves from the atmosphere to plants.
Carbon moves from plants and animals to soils.
Carbon moves from the atmosphere into space
Carbon moves from the atmosphere into space
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.
Example Question #48 : Middle School Life Science
Which of the following correctly identifies the significance of Carbon on Earth?
Living things need carbon to survive
all of these
none of these
Carbon is found in non-living things such as rocks, animal shells, the atmosphere and oceans
The Earth has a finite amount of carbon
all of these
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.
Example Question #49 : Middle School Life Science
Which of the following has the largest effect on the carbon cycle?
bird migrations
human activities
none of these impact the carbon cycle
the water cycle
human activities
The answer is "human activities." 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.
Example Question #50 : Middle School Life Science
What happens to Carbon stored in plants and animals when they die?
it evaporates
it decomposes
none of these
all of these
it disappears
it decomposes
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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