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Science Fair Project IdeasPhysical Science: Solids, Liquids, and Gases (3–4)

FreezingDoes hot water freeze faster than cold water?

Do different liquids take different amounts of time to freeze?

Will salt, tap, or bottled water freeze fastest?

Do some sizes and shapes of containers allow water to freeze faster than others?

What kind of insulating material keeps an ice cube frozen for a longer time?

Does water change size when it freezes?

MeltingWhen snow melts, how much water does it make?

Will pressure cause ice to melt, even if the temperature is below freezing?

Do different kinds of frozen liquids take different amounts of time to thaw?

Do different brands of frozen pops melt at the same rate?

Do different colors of crayons melt at different temperatures?

Does butter melt faster in the sun or under a lamp?

Does ice change size when it melts?

Evaporation, Boiling, and GasesHow do temperature and wind affect evaporation rate?

Do salt and soap affect evaporation rate?

Do different liquids evaporate at the same rate?

Does the thickness of a liquid affect its evaporation rate?

Does the size and shape of a container affect evaporation rate?

© Learning A–Z All rights reserved. www.sciencea-z.com

Science Fair Project Ideas

MoRE

Physical Science: Solids, Liquids, and Gases (3–4)

MixturesDoes salt dissolve fastest in hot, warm, room-temperature, or cold water?

Does salt water stay warm longer than tap water?

How does salt affect the boiling point of water?

How much sugar can be added to water before the water becomes saturated?

Do stains come out better in hot or cold water?

Do equal volumes of different liquids weigh different amounts?

Which materials lose their individual properties when combined with water, and which keep them?

How much salt must be added to a cup of water before it becomes translucent? Opaque?

How much salt does it take to make an egg float?

Can salt be separated from water?

How does the water level in a lake change with the weather?

How does humidity affect evaporation rate?

Can hair or animal fur be used to measure humidity?

Can water vapor be captured?

Does the boiling point of water change at different elevations?

Do different liquids take different amounts of time to boil?

How long does it take for a bathroom mirror to fog up using different temperatures of shower water?

Does a balloon stay inflated longer in warm or cold air?

Do soap bubbles last longer on warm or cold days?

Does the size of a helium balloon determine how long it will stay afloat?

How long will a volleyball keep its pressure in different temperatures?

Do different gases weigh different amounts?