8th EXAM - Physical Science review

Match the Following

• The smallest unit of an element that keeps the element’s chemical properties.

• Neutron

• Positively charged particles found in the nucleus of an atom.

• Proton

• The dense center of an atom containing protons and neutrons.

• Atom

• Particles with a neutral charge found in the nucleus of an atom.

• Nucleus

• A substance that cannot be broken down into simpler substances by chemical means.

• Element

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NGSS.MS-PS1-1

How many protons does this atom have?

• 3
• 6
• 4
• 2

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NGSS.MS-PS1-1

Explain what is happening in the following image.

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

NGSS.MS-PS1-1

Which of the following models best demonstrates a balanced chemical equation?

• F
• G
• H
• J

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

How many atoms in all are in a molecule of serotonin?

C₁₀H₁₂N₂O

• 22
• 24
• 25
• 4

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NGSS.MS-PS1-1

Read the following statements. Select each answer choice that is a true statement about synthetic materials. Please select 4 answers.

• Synthetic materials are made from natural resources

• Synthetic materials are made by chemically changing natural resouces to create a material with different characteristics.

• Some examples of synthetic materials are plastics, medicines, and new fuels.

• A synthetic substance cannot be chemically identical to a naturally-occurring substance

• Making and using synthetic materials have both positive and negative impacts on society.

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NGSS.MS-PS1-3

Information on the raw materials required to produce four synthetic materials is provided.

(See attached diagram)

The production of which of the listed materials would require growing plants?

• Nylon fibers

• Glass

• Paper

• Gasoline

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NGSS.MS-PS1-3

The table provides information on three alternative fuels.

(See attached diagram)

The data in this table can be used as evidence to support the claim that all of these fuels–

• are very costly to produce.

• exist in the same state of matter.

• are made of natural materials.

• take several days to produce.

Cold things often have a _________ kinetic energy because_______

• lower; particles are moving around less

• lower; particles are moving around more

• higher; particles are moving around the same

• higher; particles do not move

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NGSS.MS-PS1-4

NGSS.MS-PS3-4

For objects that have the SAME mass, which object will have a HIGHER thermal energy?

• the object with the higher temperature

• the object with the lower temperature

• the objects will have the same temperature

• the objects have no temperature