Which is the best example of a physical change?

A girl washes her favorite sweater. She hangs it outside on a clothesline in the sun. Two hours later, the sweater is dry. What happened to the water in the sweater?

What process allows ocean currents to transfer heat around the globe?

Miguel prepares a flower bed on a hot summer morning. He covers the bed with a sheet of plastic that extends to the edge of the bed. He notices at the end of the day that the plastic now extends two inches beyond the edge. Why has that happened?

Which statement best explains how energy is transferred during evaporation and precipitation?

Which statement best describes what will occur when a hot nail is dropped into a container of cold water?

A pot containing 500 ml of water is brought to a boil. Later, the pot contains 400 ml of boiling water. Why is there a difference in the amount of water in the pot?

A builder measures the length of a metal beam and finds that it is slightly shorter than when he measured it that morning. Why is the beam shorter?

Which is an example of the formation of a new substance?

Which example describes the release of energy from water?

A 50-gram ice cube changes to liquid water and then to water vapor. What happens during this process?

Outer space can be extremely cold. How does a space suit allow a human to survive the cold of space?

How does a warm can of soda become cold when it is placed in a container of ice?

Which best describes the process of convection?

Anya placed an ice cube on the sidewalk on a warm day. The ice cube soon melted to form a puddle. What process caused the ice cube to melt?

Clarissa wants to determine the best material to make a new type of cookware. What type of material should she choose?

How does heat energy from the sun reach Earth?

Which material is most likely to expand if exposed to freezing temperatures?

Raul is packing a cooler for a hot day at the beach. Which type of cooler should he select to keep his food as cold as possible?

Tonya observes a mixture of two clear liquids in a container to see if a chemical change occurs. Which observation demonstrates the mixture is undergoing a chemical change?

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