Science

What change occurs when a liquid evaporates?

• The particles absorb heat and get closer together.

• The particles absorb heat and spread farther apart.

• The particles release heat and get closer together.

• The particles release heat and spread farther apart.

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NGSS.MS-PS1-4

Sam found two pieces of pure silver on two different continents and melted them. Why did the two pieces of pure silver have the same melting point?

• Silver is a metal with high conductivity.

• The melting point of all metals is the same.

• Silver is composed of the same types of atoms.

• The melting point of all natural minerals is the same.

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NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is the best way to determine if a sample is pure gold?

• compare the color of the sample with a sample of pure gold

• compare the luster of the sample with a sample of pure gold

• compare the volume of the sample with a sample of pure gold

• compare the melting point of the sample with a sample of pure gold

How does a 5-g sample of pure gold compare to a 50-g sample of pure gold?

• They have the same melting point but different masses.

• They have the same volume but different melting points.

• They have the same volume but different boiling points.

• They have the same mass but different boiling points.

What happens to the movement of water particles when the water is cold compared to when it is hot.

• The particles in the cold water move more slowly.

• The particles in the cold water move more quickly.

• The particles in the cold water move more freely.

• The particles in the cold water do not move at all.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Graphite, diamond, and glassy carbon are all forms of the element carbon. Why are all three considered carbon?

• They were originally fossils.

• They are mined from the same region.

• They are composed of the same kind of atoms.

• They were formed from carbon-containing organisms.

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NGSS.MS-PS1-1

Which best represents atoms moving closer together during a phase change?

• water in a lake gaining heat energy and evaporating

• ice on a mountaintop gaining heat energy and melting

• ice in the atmosphere losing heat energy and precipitating

• water vapor high in the atmosphere losing heat energy and freezing

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NGSS.MS-PS1-4

Which is a phase change of matter that can always occur without a substance changing its identity?

• dissolving

• freezing

• reacting

• rusting

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NGSS.MS-PS1-4

Which changes when a solid becomes a liquid?

• number of atoms present

• movement of the atoms

• color of the atoms

• mass of the atoms

Tags

NGSS.MS-PS1-4

Why does the smell of food spread as its temperature is increased during cooking?

• The food becomes more solid.

• The food releases more gases.

• The food produces less energy.

• The food causes less convection.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4