Unit 3 : Convection Quick Check

When matter is heated, it becomes...

• More dense. Atoms will move closer together.

• Less dense. Atoms will move closer together.

• More dense. Atoms will move farther apart.

• Less dense. Atoms will move farther apart.

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What is density?

• It is a measure of the length and width of an object.

• It is a measure of the mass of an object.

• It is a measure of how many atoms are in a certain amount of space and how tightly they are packed.

• It is a measure of how long it takes an object to float in water.

What is this image attempting to demonstrate?

• It is demonstrating how heat can be used to create convection currents.

• It is demonstrating that warm air will sink and cold air will rise.

• It is demonstrating how to cook Thanksgiving dinner.

• It is demonstrating the mechanical components of a microwave oven.

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How is wind created on Earth?

• Unequal heating of Earth's surface causes warm pockets of air to sink and cold pockets of air to rise.

• Unequal heating of Earth's surface causes warm pockets of air to rise and cold pockets of air to sink.

• The Earth's rotation creates wind.

• The Earth's revolution creates wind.

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How are wind and ocean currents similar?

• Both are created through radiation- when warm matter rises and cold matter sinks.

• Both are created through conduction- when warm matter rises and cold matter sinks.

• Both are created through convection- when warm matter rises and cold matter sinks.

• They have nothing in common.

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How do atoms reach this state of matter?

• Thermal energy must be removed.

• Thermal energy must be added.

• Electrical energy must be removed.

• Mechanical energy must be added.

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Which diagram best represents why we have convection currents in our atmosphere and oceans?

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Which image below best represents matter with low density and low pressure?

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• All of these represent matter with equal density and equal pressure.

When thermal energy is removed from matter, which of the following statements is true?

• Matter will become less dense

• Matter will rise

• Matter will become more dense

• Matter will spread out

Tags

NGSS.MS-PS1-4