Ecology

Most free oxygen (O2) in the earth's atmosphere is produced by

• volcanic eruptions

• burning fossil fuels

• photosynthesis

• decomposition of organic matter

Tags

NGSS.MS-LS1-6

This is released by the weathering of rocks.

• Carbon

• Oxygen

• Phosphorus

• Nitrogen

_____ brings phosphorous into our waterways. .

• precipitation

• runoff

• transpiration

• condensation

Tags

NGSS.MS-LS2-3

Converting nitrogen in the atmosphere into a form that can be used by plants is called?

• Nitrogen Fixation

• Denitrification

• Absorption

• Photosynthesis

Which of the following hosts nitrogen-fixing bacteria in nodules on its roots?

• flowers

• legumes

• trees

• grains

Plants and animals cannot use nitrogen directly from the air.

• True

• False

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

Which organisms play the largest role in converting nitrogen into various usable forms and back to a gas form?

• fungi

• bacteria

• plants

• insects

Tags

NGSS.MS-LS2-3

Which of the following best describes the Greenhouse Effect?

• when solar radiation reflects off the atmosphere

• heat is retained in Earth's atmosphere by greenhouse gases

• plants grow better when a greenhouse is filled with CO₂

• when solar radiation hits Earth's surface directly

Tags

NGSS.MS-ESS3-5

What does denitrification do?

• converts fixed nitrogen into nitrogen gas

• converts nitrogen gas into fixed nitrogen

• makes nitrates

• makes ammonia

Tags

NGSS.MS-LS2-3

The process of making nitrites and nitrates is...

• denitrification

• nitrogen fixation

• nitrification

• ammonification

Tags

NGSS.MS-LS2-3