Which pair of molecules both contain carbon atoms?
answer
fats and proteins
question
What is the primary function of the carbon cycle?
answer
recycling the supply of carbon on Earth
question
What would most likely happen to life on Earth if the carbon cycle stopped?
answer
Life would cease to exist.
question
Which reason best explains why living things need carbon?
answer
Carbon is a source of energy.
question
The chemical formula for the major component of palm kernel oil is CH3(CH2)14CO2H. The chemical formula for the carbohydrate glucose is C6H12O6.
Which statement best describes these macromolecules as foods?
answer
Palm kernel oil would provide more energy than glucose because it contains more carbon bonds, which release energy when broken.
question
Which statement best illustrates why carbon is so important to living things?
answer
Carbon-based macromolecules are found in all life forms.
question
The table below shows the level of carbon dioxide in the atmosphere for a period of 50 years.
What conclusion can you make about how the carbon dioxide level has changed over time?
answer
The level of CO2 has risen.
question
What is stored in carbon bonds?
answer
energy
question
What happens when humans burn fossil fuels?
answer
Carbon is released into the atmosphere.
question
Look at the levels of carbon dioxide in the data table below.
By how much did carbon dioxide levels increase from 1980 to 2000?
Which pair of molecules both contain carbon atoms?
answer
fats and proteins
question
What is the primary function of the carbon cycle?
answer
recycling the supply of carbon on Earth
question
What would most likely happen to life on Earth if the carbon cycle stopped?
answer
Life would cease to exist.
question
Which reason best explains why living things need carbon?
answer
Carbon is a source of energy.
question
The chemical formula for the major component of palm kernel oil is CH3(CH2)14CO2H. The chemical formula for the carbohydrate glucose is C6H12O6.
Which statement best describes these macromolecules as foods?
answer
Palm kernel oil would provide more energy than glucose because it contains more carbon bonds, which release energy when broken.
question
Which statement best illustrates why carbon is so important to living things?
answer
Carbon-based macromolecules are found in all life forms.
question
The table below shows the level of carbon dioxide in the atmosphere for a period of 50 years.
What conclusion can you make about how the carbon dioxide level has changed over time?
answer
The level of CO2 has risen.
question
What is stored in carbon bonds?
answer
energy
question
What happens when humans burn fossil fuels?
answer
Carbon is released into the atmosphere.
question
Look at the levels of carbon dioxide in the data table below.
By how much did carbon dioxide levels increase from 1980 to 2000?
answer
32 ppm
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