Topic Test Answers

The majority of water on the Earth is usable by plants and animals.

Ice does not need to melt into liquid water before it can return to the atmosphere as water vapor.

Which of the following statements is true? a. The nitrogen cycle is the most important cycle for life. b. The oxygen cycle is the least important cycle for life. c. Life can be sustained without any of the cycles for life present. d. All cycles of matter are equally important for life to be sustained. Please select the best answer from the choices provided

Cycles are essential to all living organisms.

Which of the following is not a way in which carbon gases are introduced into the atmosphere? a. forest fires b. respiration c. photosynthesis d. burning of fossil fuels Please select the best answer from the choices provided

Which of the following does not take place in the water cycle? a. precipitation b. evaporation c. carbonation d. condensation

Nitrogen-fixing bacteria convert atmospheric nitrogen into forms of nitrogen that living things can use. Please select the best answer from the choices provided

Plants in the rainforest contribute to precipitation there through transpiration.

Water stored in snow and ice can return directly to the atmosphere through the process of sublimation. Please select the best answer from the choices provided

Which of the following is a possible source of water pollution? a. storms b. factories c. farms d. all of the above Please select the best answer from the choices provided

The carbon cycle involves an exchange of carbon between _______.a.the geosphere and atmosphereb.the atmosphere and hydrospherec.the geosphere and hydrosphered.the geosphere, hydrosphere, and atmosphere

Which of the following statements about the phosphorus cycle is true?a.In living organisms, phosphorus can be found in nucleic acids.b.Phosphorus in aquatic ecosystems is only found in sediment.c.Elevated levels of phosphorus in aquatic ecosystems is always beneficial. d.The soil plays no part in the phosphorus cycle.

What is the relationship between the oxygen cycle and the carbon cycle?

Plants in the desert _______.a.effectively conserve and retain water b.have high levels of transpirationc.release 50-80% of water back into the ecosystemd.make their own precipitation

Biogeochemical cycles _______.a.are not essential for lifeb.move through abiotic and biotic regionsc.are the result of natural disastersd.provide the greatest amount of energy for the Earth