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Investigation 2

Vocabulary for investigation 2

Float to stay on the surface of water as a result of being less dense than water
Less Dense When an object floats in water
Sink to go under water as a result of being more dense than water
More dense When an object sinks in water
Freeze to change from a liquid to a solid state as a result of cooling
Solid a state of matter that has a definite shape and volume
Liquid a state of matter with no definite shape but a definite volume
Mass the amount of material in something
Melting to change from a solid to a liquid state as a result of warming
State the form or phase of a material, such as solid, liquid, or gas
Water Expands as water heats up the molecules move further apart causing it to less dense and take up more space in a container.
Water contracts as water cools, it the molecules contract taking up less space and becoming denser. As water continues to contract, it become a less dense cube of ice which floats.
Thermometer An instrument used to measure temperature. When the liquid in a thermometer cools, the liquid contracts and drops. When the liquid in a thermometer heats up, the liquid expands and rises in the tube.
Volume The amount of space an object takes up
How can you measure temperature accurately? Use a thermometer
What happens to water when it gets hot? The molecules expand
What happens to water when it gets cold? The molecules contract
What happens when hot or cold water is put into room-temperature water? Hot water floats (less dense) and cold water sinks (more dense)
How does water change when it gets really cold? Water becomes a solid and expands due to the shape of the molecules
Where should an animal go to stay warm or to stay cool? To stay cool animals should go underground. To stay warm animals should stay above ground and stay in the sun.
What causes pipes to burst in the winter? Water in the pipe cools until it freezes. Once it freezes, it expands.
Glaciers contain ______________________. Glaciers contain the highest percentage of the Earth's freshwater
Created by: twhipp7