Wonderopolis "Does salt water freeze?"

Does salt water freeze?

• Yes, at the same temperature as freshwater

• No, it never freezes

• Yes, but at a lower temperature than freshwater

• Yes, but only at absolute zero

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At what temperature does ocean water freeze?

• 0 degrees Celsius

• 32 degrees Fahrenheit

• -2 degrees Celsius

• 28.4 degrees Fahrenheit

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Is polar ice freshwater or salt water?

• Freshwater

• Salt water

• A mixture of both

• Neither, it's a different substance

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What is the freezing point of freshwater?

• 0° Celsius

• -1.8° Celsius

• 32° Fahrenheit

• 28.8° Fahrenheit

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How does the presence of salt in water affect its freezing point?

• It increases the freezing point.

• It reduces the freezing point.

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Why is salt often used on icy roads?

• To make the roads slippery.

• To slow down freezing and make them safer.

• To melt the ice instantly.

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Why does ocean water not usually freeze like ponds?

• Because ocean water is always warm.

• Because of the constant movement of ocean waves.

• Because ocean water contains no salt.

• Because ponds have a higher salt content.

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Where is ocean water likely to freeze?

• Near the equator.

• At the North Pole or South Pole.

• In tropical regions.

• It never freezes.

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What percentage of the ocean contains sea ice for at least part of the year?

• About 5%

• About 10%

• About 15%

• About 20%

What type of ice does polar ice become when melted?

• Saltwater ice

• Freshwater ice

• Glacial ice

• Pack ice