Bio Unit 3 Topic 2 - Functioning ecosystems

The cycling of matter is important because

• A.Matter can be created and destroyed
• B.Only a limited amount of matter is available so it has to be recycled
• C.Matter can only be found in a solution
• D.Bacteria use matter to convert organisms into solar energy

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

How are decomposers important in the cycling of matter?

• A.Decomposers kill nutrients
• B.They break down dead organisms and put nutrients back into the soil
• C.Decaying matter takes a long time to recycle
• D.Decomposers are composed of hydrogen and titanium

Tags

NGSS.MS-LS2-3

What is the average percentage of energy is available to be passed on to the next trophic level in an ecosystem?

• 100%

• 10%

• 50%

• 75%

In an energy pyramid, the amount of energy available to be transferred to the next level _______ as you move up the pyramid.

• Increases

• Decreases

• Stays the same

• Changes up and down

Which diagram shows a pyramid of biomass for the food chain in the picture?

• 
• 
• 

Select all of the techniques that can be used to sample abiotic factors:

• Quadrats

• Pitfall traps

• pH Meter

• Light Meter

• Belt transect

Select all of the techniques that can be used to sample biotic factors:

• Quadrats

• Pitfall traps

• pH Meter

• Light Meter

• Belt transect

True or False:

Bacteria create a form of nitrogen that animals can use directly

• True

• False

True or False:

Bacteria release nitrogen from dead organisms into the soil

• True

• False

True or False: Bacteria fix nitrogen from the atmosphere into a form plants can use

• True

• False

Tags

NGSS.MS-LS2-3