Water Cycle – Astronomy Exam
The key terms of Astronomy Exam include, Carbon, Water Cycle, Nitrogen, Carbon Dioxide, Atmosphere, Decomposers.
Which star is closest to earth?
- Polaris
- the sun – correct
- the Milky Way
- Sirius
What is the innermost layer of the sun’s atmosphere called?
- troposphere
- photosphere – correct
- chromosphere
- corona
Using special equipment, which layer of the sun’s atmosphere is visible during a total solar eclipse?
- photosphere
- solar flares
- chromosphere
- corona – correct
Climate change on earth is thought to be affected by which of the following solar phenomena?
- solar prominences
- solar eclipses
- solar flares
- sunspots – correct
The burning of fossil fuels releases which of the following gases into the atmosphere?
- nitrate
- nitrogen
- carbon dioxide – correct
- oxygen
What role do decomposers play in the cycling of material in a biogeochemical cycle?
- Decomposers make chemicals from the nonliving environment into organic compounds.
- Decomposers use nonliving processes such as rain and fire to make inorganic chemicals.
- Decomposers incorporate some organic compounds into their bodies and release some back to the environment as waste.
- Decomposers break down organisms to supply the soil, water, and air with inorganic chemicals. – correct
During which of the following steps of the water cycle is water changed from a vapor state to a liquid state?
- transpiration
- condensation – correct
- evaporation
- precipitation
What impact can deforestation have on the water cycle?
- Photosynthesis increases, thereby increasing the amount of carbon dioxide in the air.
- Transpiration declines. – correct
- Carbon dioxide is released into the air as trees are burned.
- The amount of nitrogen-fixing bacteria increases.
Carbon dioxide enters the atmosphere through each of the following processes except one which one?
- volcanic eruptions
- photosynthesis – correct
- burning fossil fuels
- respiration
The use of fossil fuels is a concern because it can lead to which of the following?
- increased runoff
- eutrophication
- polluted waters
- global warming – correct
A farmer has concerns about the nitrogen levels in her soils.
What can she do to ensure that the nitrogen bacteria are replenished in the soil?
- Plant more plants to increase transpiration.
- Clear cut the area surrounding the field.
- Plant a crop of legumes, such as clover or alfalfa. – correct
- Plant a crop of mushrooms to speed up decomposition.
Where is the largest reservoir of carbon on earth located?
- in the atmosphere
- in freshwater
- on land
- in the oceans – correct
Marine organisms have carbon in their bodies in which of the following forms?
- pure carbon
- carbon dioxide
- calcium carbonate – correct
- bicarbonate
Carbon in the bodies of marine organisms is often found in which of the following forms?
- chemical sedimentary rock – correct
- clastic sedimentary rock
- layered sedimentary rock
- igneous rock
Which of the following is the source of energy for the water cycle?
- gravity
- volcanic eruptions
- winds
- the sun – correct
Which of the following statements about the water cycle is true?
- Organisms in the biosphere do not influence the water cycle.
- The water cycle only continues during daylight hours.
- Precipitation that falls to the ground ends up only as groundwater.
- Plants play a vital role in the water cycle. – correct
Why is nitrogen fixation such an important step in the nitrogen cycle?
- Decomposers need to use cap n cap h sub 4 plus.
- Bacteria convert the fixed nitrogen back into N2.
- Soil nitrogen is different.
- Plants can’t use nitrogen in the form of cap n sub 2. – correct
How does deforestation affect the water cycle?
- It reduces the amount of carbon dioxide in the atmosphere.
- It leads to an increase in eutrophication.
- It increases the amount of transpiration.
- It can alter precipitation patterns. – correct
The carbon cycle works in conjunction with which of the following?
- all biogeochemical cycles
- nitrogen cycle
- cycling of oxygen – correct
- water cycle
Energy from the sun comes from fusion.
What happens during that reaction?
- Helium turns into hydrogen.
- Hydrogen turns into helium. – correct
- Oxygen turns into carbon dioxide.
- Carbon dioxide turns into oxygen.
Which star is closest to earth?
- Polaris
- the sun – correct
- the Milky Way
- Sirius
What is the innermost layer of the sun’s atmosphere called?
- troposphere
- photosphere – correct
- chromosphere
- corona
Using special equipment, which layer of the sun’s atmosphere is visible during a total solar eclipse?
- photosphere
- solar flares
- chromosphere
- corona – correct
Climate change on earth is thought to be affected by which of the following solar phenomena?
- solar prominences
- solar eclipses
- solar flares
- sunspots – correct