Com 2 Review

Humans burn fossil fuels and wood, releasing carbon dioxide into the atmosphere. This carbon dioxide is then absorbed by trees for photosynthesis. These processes are contributory to which chemical cycle?

• The carbon cycle

• The water cycle

• The nitrogen cycle

• The phosphorous cycle

How does the human body return carbon to the atmosphere in the carbon cycle?

• Waste products

• Photosynthesis

• Cellular respiration

• Formation of glucose

In the carbon cycle, animals can release carbon back into the cycle through __________ or through __________.

• burning . . . photosynthesis

• fixation . . . decomposition

• decomposition . . . photosynthesis

• respiration . . . decomposition

• respiration . . . photosynthesis

Which of the following is an example of human impact on the carbon cycle?

• The increased production of methane gases from cattle farms

• The burning of fossil fuels

• The cutting down of trees for lumber

• Driving automobiles

• All of the above

What kind of organism takes out the most carbon from the atmosphere?

• Plants

• Bacteria

• Animals

• Humans

What is the geosphere?

• all the air and gases on the planet

• all the frozen water on the Earth

• the non-living soil, rocks, and minerals of the Earth

• the rivers, lakes, and oceans of the Earth

What is the biosphere?

• all the air and gases on the planet

• made up of living things

• the non-living soil, rocks, and minerals of the Earth

• the rivers, lakes, and oceans of the Earth

What is the hydrosphere?

• all the air and gases on the planet

• made up of living things

• the non-living soil, rocks, and minerals of the Earth

• the rivers, lakes, and oceans of the Earth

What is the atmosphere?

• all the air and gases on the planet

• made up of living things

• the non-living soil, rocks, and minerals of the Earth

• the rivers, lakes, and oceans of the Earth

When a dead plant decomposes into the soil, the interaction is between the __________ and the _____________.

• atmosphere and hydrosphere

• biosphere and geosphere

• hydrosphere and biosphere

• atmosphere and geosphere