Unit 2 Test: The Structure of Matter

Which statement describes the particles in a gas?

• A. Gas particles are spaced far apart and move around freely.

• B. Gas particles are spaced far apart and move around slowly.

• C. Gas particles are tightly packed together and move past each other freely.

• D. Gas particles are loosely packed together and move past each other freely.

Thermal energy is transferred away from a sample of water vapor. Which of these best describes the change of state that occurs?

• A. condensation from point A to point B

• B. vaporization from point A to point B

• C. condensation from point B to point C

• D. vaporization from point B to point C

Tags

NGSS.MS-PS1-4

Ethane is a substance that is used when making plastic. A molecule of ethane is made of two carbon (C) atoms and six hydrogen (H) atoms. The carbon atoms are joined by a chemical bond. Each of the hydrogen atoms is joined to one of the carbon atoms by a chemical bond. Which is an accurate model of ethane?

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NGSS.MS-PS1-1

Liquid copper is removed from a smelting furnace and left to cool until it undergoes a change of state. Which pair of diagrams illustrate the liquid copper particles during the change in state that occurs?

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NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which of the following features of the sulfur crystals are evidence that sulfur is composed of matter? 

• A. It is yellow and takes up space.

• B. It takes up space and has mass.

• C. It is visible and has mass.

• D. It has mass and is yellow.

Which of the following properties of a mineral, such as sulfur, would help you identify it? 

• A. hardness, color, luster.

• B. size, hardness, color.

• C. color, density, luster.

• D. luster, hardness, size.

Tags

NGSS.MS-PS1-2

Which of the following would happen to the particles when you break a rock in half?

• A. Particles at the break would be destroyed.

• B. Particles at the break would detach from one another.

• C. All of the particles would be rearranged into new particles.

• D. New particles would be formed at the break.

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NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following are ways that a scientist might use patterns?

• A. identify matter

• B. categorize matter

• C. develop explanations of phenomena

• D. study interactions in ecosystems

• All of the above.

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NGSS.MS-LS2-2

Why does the milk flow out of the glass and spread out into a thin puddle rather than staying in the glass or spreading out more across the floor?

• A. The particles can break apart, but cannot move.

• B. The particles can slide past each other, but attractions hold them close together.

• C. The particles cannot move, but they can grow in size.

Tags

NGSS.MS-PS1-4

How can the volume of gas in the balloons be greater than the volume of the cylinder used to fill them?

• A. A gas has a fixed shape.

• B. A gas expands to fill its container.

• C. The volume of the container does not depend on the gas.

Tags

NGSS.MS-PS1-4