Energy and Matter in Ecosystems

If a forest full of trees is in the sunlight, what is happening to the number of energy storage molecules in the trees?

• The number of energy storage molecules is decreasing.

• The number of energy storage molecules is staying the same.

• The number of energy storage molecules is increasing.

• This doesn't matter.

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

What is the name of the process where plants and other producers use sunlight to convert carbon dioxide and water to ESM's and oxygen?

• Energy Storage Molecules

• Photosynthesis

• Cellular Respiration

• Heterotrophs

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Which organisms undergo photosynthesis?

• Producers

• Consumers

• Decomposers

• All of the above

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NGSS.MS-LS1-6

Algae are plantlike organisms that live in the water. These algae have been in sunlight for several hours now. What can the algae do because they are in sunlight? What does this mean for the number of energy storage molecules in the algae?

• take in carbon from the air. The carbon is used to make energy storage molecules.

• take in carbon from the air. The carbon is used to break down energy storage molecules.

• give off carbon to the air. Giving off carbon allows them to make energy storage molecules.

• give off carbon to the air. Giving off carbon uses up energy storage molecules.

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NGSS.MS-LS1-6

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The amount of matter in an ecosystem is always ​ (a)   . It just changes forms and is recycled.

• constant

• decreasing

• increasing

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Match the following

• anything that has mass and takes up space.

• law of conservation of mass

• mass cannot be created or destroyed

• matter

• energy cannot be created or destroyed

• law of conservation of energy

• a tool that can be used to trace the flow of energy through an ecosystem.

• energy pyramid

• the ability to do work and enables organisms to use matter in life processes.

• energy

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NGSS.MS-PS1-5

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Giant pandas eat bamboo plants in the mountains of China. The number of energy storage molecules has decreased in both the bamboo and the pandas. What has happened to the amount of carbon in the bamboo and the pandas? The amount of carbon in the bamboo and pandas . . .

• has not changed.

• is not related to the number of energy storage molecules.

• has increased.

• has decreased.

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NGSS.MS-LS1-5

NGSS.MS-LS1-6

NGSS.MS-LS2-1

NGSS.MS-LS2-3

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In order for matter to recycle and return in the food chain shown here, what must be present at level A?

• Tertiary consumers

• Decomposers

• Producers

• Secondary consumers

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

The sun has been up for several hours, and it has been shining on these trees. What can the trees do because they are in sunlight? What does this mean for the number of energy storage molecules in the trees?

• give off carbon to the air. Giving off carbon allows them to make energy storage molecules.

• give off carbon to the air. Giving off carbon uses up energy storage molecules

• take in carbon from the air. The carbon is used to make energy storage molecules.

• take in carbon from the air. The carbon is used to break down energy storage molecules.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS1-6

These goats are eating grass on a sunny day. What is happening to the carbon in the air around the living things on the mountain? Is carbon moving into the air, moving out of the air, or both?

• Carbon is only moving into the air; it is not moving out of the air.

• Carbon is moving into the air and out of the air at the same time.

• Carbon is not moving into the air; it is only moving out of the air.

• With this information, there is no way to know for sure.

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NGSS.MS-LS1-6

NGSS.MS-LS2-3