Matter and Energy in Ecosystems

What is a producer?

• organism that cannot make their own food so they eat other organisms

• organism that makes their own food

• organism that break down dead organisms

Tags

NGSS.MS-LS2-3

What is a decomposer?

• an organism that breaks down dead organisms for energy

• an organism that makes its own food

• an organism that eats other organisms

Tags

NGSS.MS-LS2-3

Does a food chain start with the sun?

• yes

• no

What is a food web?

• a model that contains many food chains

• a model that contains one food chain

• a model that shows where the sun gets its energy

• a model that shows how decomposers break down organisms

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3

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

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

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.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-1

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-LS1-6

NGSS.MS-LS2-3

Match the following

• energy cannot be created or destroyed

• energy pyramid

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

• law of conservation of mass

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

• matter

• mass cannot be created or destroyed

• law of conservation of energy

• anything that has mass and takes up space.

• energy

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

NGSS.MS-PS1-5

NGSS.MS-PS3-5

True or False:

A food web shows how energy flows through an ecosystem

• true

• false

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

What is the source of all energy?

• water

• food

• decomposers

• sun

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3