Matter and Energy Ecosystems

What gas is taken in during photosynthesis?

• Argon

• Nitrogen

• Oxygen

• Carbon dioxide

Tags

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 the sunlight? What does this mean for the number of energy storage molecules in the trees?

The trees can . . .

• 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-LS1-6

NGSS.MS-LS2-3

A scientist set up an experimental ecosystem in a sealed room with no windows. The experimental ecosystem has plants, and animals that eat those plants. The scientist can control whether the room is light or dark with a light switch outside the room. The amount of carbon in the air of the ecosystem started out low. Then the amount of carbon in the air started to increase. Is the increase because the scientist switched the light on or because she switched the light off? What happened to the number of energy storage molecules in the living things?

• switched the light off, and the number of energy storage molecules in the living things decreased.

• switched the light off, and the number of energy storage molecules in the living things increased.

• switched the light on, and the number of energy storage molecules in the living things increased.

• switched the light on, and the number of energy storage molecules in the living things decreased.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS1-7

NGSS.MS-LS2-3

Scientists are studying cellular respiration in a river ecosystem that has plants, animals, and decomposers (which consume dead things). Which group or groups of organisms in the river carry out cellular respiration?

• plants

• animals and decomposers

• all organisms in the river

• animals

Tags

NGSS.MS-LS2-3

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

• constant

• decreasing

• increasing

Tags

NGSS.MS-LS2-3

Match the following

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

• matter

• mass cannot be created or destroyed

• law of conservation of mass

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

• energy pyramid

• anything that has mass and takes up space.

• energy

• energy cannot be created or destroyed

• law of conservation of energy

Tags

NGSS.MS-LS2-3

NGSS.MS-PS1-5

NGSS.MS-PS3-5

What gas is released during photosynthesis?

• Carbon dioxide

• argon

• oxygen

• nitrogen

Tags

NGSS.MS-LS1-6

Where does the energy for photosynthesis come from?

• carbon dioxide

• oxygen

• the sun

• glucose

Tags

NGSS.MS-LS1-6

In what way are photosynthesis and cellular respiration different?

• Cellular respiration stores energy, while photosynthesis releases energy

• Cellular respiration produces oxygen, while photosynthesis uses oxygen

• Photosynthesis releases energy, while cellular respiration stores energy

• Photosynthesis uses carbon dioxide, while cellular respiration produces carbon dioxide

Tags

NGSS.MS-LS1-6

How do consumers get energy storage molecules?

• Absorbing sunlight

• breaking down dead organisms

• soaking it up from the ground

• feeding on other organisms