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Investigation 2
Vocabulary for investigation 2
Term | Definition |
---|---|
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 |