7th grade science 2nd quarter review

Your brain is a structure composed of different kinds of tissue. What is this kind of structure called?

• a cell

• an organ system

• an organ

• a tissue

Muscles, bones, and nerves work together to

• move materials in your body.

• control body functions.

• make your body move.

• remove waste products.

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After you breathe air into your lungs, oxygen from the air goes into your

• heart

• muscles

• bones

• bloodstream

The endocrine system produces chemicals that

• require a system of nerves to control many body activities

• travel to selected locations through tiny tubes.

• control both daily activities and long-term changes through hormones

An effect of long-term stress is

• general health improves

• body functions become balanced

• homeostasis is disrupted

• immunity is strengthened

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NGSS.HS-LS1-3

One function of the skeleton is to

• help control voluntary muscles

• move food through the digestive system

• help the body maintain a steady body temperature

• provide shape and support for the body

Which type of muscle is found only in the heart?

• voluntary muscle

• cardiac muscle

• smooth muscle

• soft muscle

How do pairs of skeletal muscles work together?

• Both muscles contract at the same time

• Both muscles extend at the same time

• While one muscle in the pair contracts, the other returns to its original length

• One muscle in the pair pulls on a bone, while the second muscle pulls on the first muscle.

A mixture of two gases is in a rigid container at 25

C. The particle diagram shows a mixture of neon gas

and argon gas.

The temperature was decreased below the boiling point of each gas. Which diagram shows what would happen to the gas mixture?

• 
• 
• 
• 

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Students look at pictures of structures found in living organisms. Each picture represents a different level of

complexity.

Which sequence places the structures in order from LEAST complex to MOST complex?

• 1, 2, 4, 3

• 1, 3, 2, 4

• 2, 1, 3, 4

• 2, 1, 4, 3

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NGSS.MS-LS1-2

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