Ecology Test

Abiotic factors are

• living

• nonliving

Tags

NGSS.MS-LS2-3

What is one biotic factor that affects the size of a population in an ecosystem?

• Local geography

• Number of predators present

• Average yearly temperature

• Average yearly precipitation

Tags

NGSS.MS-LS2-4

Organisms, such as plants or phytoplankton that carry out photosynthesis, would cause a decrease of which gas in the atmosphere?

• Oxygen

• Carbon dioxide

• Water

• Ozone

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

In the carbon cycle, decomposers return carbon to the soil.  Which of the following is NOT something that decomposers can break down?

• Waste products like urine or feces

• Carbon dioxide found in the air

• The bodies of dead plants and animals

• Scraps of discarded food

Tags

NGSS.MS-LS2-3

Humans increase carbon dioxide (CO₂) in the atmosphere, and contribute to the carbon cycle by

• combustion from driving cars.

• planting trees to improve photosynthesis.          

• conserving energy with alternative energies.    

• using more solar power electricity.

Tags

NGSS.MS-ESS3-4

Nitrogen in the air must be "fixed" before it can be used by plants.  Atmospheric nitrogen is "fixed" by

• plants

• bacteria

• bacteria and insects.

• bacteria and fungi (decomposers)

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

When deforestation (cutting down trees) occurs in an area, what immediate effect does this have on the water cycle?

• More water is returned to the atmosphere by transpiration.

• There is less runoff water, but more transpiration.

• More photosynthesis occurs, and CO₂ begins decreasing.

• Less is returned to the air by transpiration.

Tags

NGSS.MS-ESS2-4

The main result of photosynthesis is

• decreased atmospheric nitrogen.           

• absorbing nitrogen for the plant to use.

• CO₂ is removed and captured by plants.

• global warming caused by CO₂ being removed.

Tags

NGSS.MS-LS1-6

Bacteria are involved in many steps of the biogeochemical cycles.  Which of the following steps is bacteria NOT involved?

• Decomposition

• Transpiration

• Nitrification

• Nitrogen fixation

Which of the following is common to the carbon cycle, the nitrogen cycle, and the water cycle?

• The substances are rearranged into different types of molecules as they move through their cycles.          

• The substances must pass through organisms in order to complete their cycles.   

• The largest reserves of these substances are always in organisms.

• These substances are required by all living things and are involved in many processes that occur in all living things.

Tags

NGSS.MS-LS2-3