matter and energy
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16 Terms
Define Contraction
when a substance loses heat energy, the molecule slow down the process of the substance to contractor get smaller
Define Expansion
When heat energy is added to a substance the molecules move more quickly. This causes the substance to expand.
what is condensation?
A gas to a liquid
what is melting?
A solid to a liquid
what is boiling?
A liquid to a gas
what is freezing?
A liquid to a solid
what is an example of a chemical change?
Baking soda and vinegar
what is an example of a physical change?
Freezing water
what is the salt that we eat?
Sodium chloride (NaCI2)
what is density?
Mass per unit volume
under what conditions will salinity be higher?
Higher or warmer climate
what about the freezing process? Makes water unique.
Water expands when losing heat energy
what is the melting point of water in Celsius and Fahrenheit?
0°C, and 32°F
what is the boiling point of water in Fahrenheit and Celsius?
212°F, and 100°C
Why does a straw look bent or broken in water??
Light changes speed and direction when traveling through water, this is called refraction.