HS ESS 2 4

The process in which nitrogen circulates and is recycled is called

• The nitrogen cycle

• The carbon cycle

• The water cycle

• The phosphorus cycle

Bacteria fix nitrogen from the atmosphere into a form plants can use.

• True

• False

Organisms that break down dead plants & animals and release nitrogen back into atmosphere...

• bacteria
• plants
• animals
• producers

Tags

NGSS.MS-LS2-3

What converts nitrogen gas into a usable form for plants and animals?

• bacteria

• rain

• fungi

• car exhaust

When humans burn fossil fuels, most of the carbon quickly enters the                       as carbon dioxide.

• Water
• Atmosphere
• Sun
• Ground

Tags

NGSS.HS-ESS2-6

NGSS.HS-ESS3-5

How do living organisms return carbon to the atmosphere in the carbon cycle?

• respiration and photosynthesis
•  decomposition and respiration

Answer explanation

During respiration, cells use oxygen and release carbon dioxide into the atmosphere. Photosynthesis uses carbon dioxide and releases oxygen into the atmosphere

Which process contributes carbon dioxide to the atmosphere?

• respiration

• photosynthesis

• tree farms

The ultimate source of energy is:

• The sky
• The sun
• Plants
• Movement

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

If there is 1000 Kcal available in the producers in trophic level 1, how much energy is available in the herbivores in trophic level 2?

• 10 Kcal
• 1 Kcal
• 100 Kcal
• 1000 Kcal

Tags

NGSS.MS-LS2-3

Fill in the levels of the ecological pyramid with the organisms in the food web.

c

a

d

e

f

b

Crab

Shark

Seal

Algae

Fish

Turtle

Tags

NGSS.MS-LS2-3