High levels of carbon dioxide (CO2) are harmful to the human body. The heart and lung work together to keep carbon dioxide levels low. When levels get too high, the heart beats faster and the lungs exhale more rapidly. Which TWO body systems work together to keep carbon dioxide levels low in the human body?

Circulatory system and Respiratory system

Digestive system and Nervous system

Circulatory system and Nervous systems

Respiratory system and Digestive system

This diagram shows how the parts of your body work together to ____

take in information and respond to the environment

How do organisms get the energy they need?

Plants get energy from sunlight to make sugars and animals get energy from eating other organisms.

Plants get energy from fertilizers and animals get energy from water.

Plants do not need energy because they do not move and animals get it from eating other organisms.

Animals breathe in oxygen and exhale carbon dioxide. Where does the oxygen come from?

It is a product of photosynthesis

It is created when they eat plants

What is the role of decomposers in a food web?

Recycle matter and energy from dead organisms

Compete with producers for energy

Control the population of consumers

The food chain: An owl eats snakes, snakes eat toads, toads eat beetles, beetles eat plants. If there was a decrease in the beetle population, how might this affect the food chain?

The population of owls would decrease

The population of green plants would decrease

The toad and snake populations would increase

A commercial fishing boat overfishes in the area and causes the fish population to decrease sharply. How will other populations be affected?

seagulls & sharks will decrease

plant and animal plankton will increase

seagulls & sharks will increase

plant and animal plankton will decrease

Gr.7, FINAL EXAM, Science

Authored by David Maicher

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25 questions

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MULTIPLE CHOICE QUESTION

30 sec • 4 pts

Which of these structures surround a cell?

cytoplasm

nucleus

cell membrane

MULTIPLE CHOICE QUESTION

30 sec • 4 pts

A student looks through a microscope and observes the structure of cells on a microscopic slide. She makes the conclusion that the cells are eukaryotic cells. Which of these statements did she most likely observe to make this conclusion?

genetic material

cell membrane

nucleus

MULTIPLE CHOICE QUESTION

30 sec • 4 pts

Which of these is TRUE of cells in a multicellular organism?

All of the cells perform the same function

Different types of cells have different functions

Every cell has a different function

MULTIPLE CHOICE QUESTION

30 sec • 4 pts

Biologists study living things. Which question should a biologist ask to determine if something is a living thing?

Does it move?

Does it breathe?

Is it made up of cells?

MULTIPLE CHOICE QUESTION

30 sec • 4 pts

Separates the inside and outside of the cell

Nucleus

Ribosome

Cell membrane

Cell wall

MULTIPLE CHOICE QUESTION

30 sec • 4 pts

Protects the plant cell

Nucleus

Ribosome

Cell membrane

Cell wall

MULTIPLE CHOICE QUESTION

30 sec • 4 pts

Makes proteins

Nucleus

Ribosome

Cell membrane

Cell wall

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Gr.7, FINAL EXAM, Science

Which of these structures surround a cell?

A student looks through a microscope and observes the structure of cells on a microscopic slide. She makes the conclusion that the cells are eukaryotic cells. Which of these statements did she most likely observe to make this conclusion?

Which of these is TRUE of cells in a multicellular organism?

Biologists study living things. Which question should a biologist ask to determine if something is a living thing?

Separates the inside and outside of the cell

Protects the plant cell

Makes proteins

Contains genetic material

Plant cells contain ____ which contain chlorophyll used during photosynthesis

What term best describes all the labeled parts of this diagram?

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