Lesson 1 Page 1
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Discover: How Does Water Change Its Physical State?
Did you know?
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Our bodies are made of about 70% water.
Because of the high boiling point of water, we do not burst into flames when we move.
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About 75% of the Earth’s surface is covered with water. The water stores the Sun's heat. This contributes to our water cycle.
When the sun shines, we feel its heat on our faces, and when a blizzard howls, we know we do not have enough heat and must put on more layers of clothing.
Heat is a process that occurs when matter increases in energy. Molecules in a solid such as ice are tightly packed together and move slowly. When the molecules heat up, they begin to move faster. They hit each other as well as bounce apart. The more they do this, the farther apart they become from each other. The solid changes state to become a liquid. The faster the molecules move, the higher the temperature. When the molecules are very far apart, a liquid such as water becomes a gas, water vapour. Heat can change the state of some types of matter such as water.
For example, consider Earth's water cycle. Heat energy from the Sun causes water to evaporate. Hot moist air rises. When the water vapour (gas) cools, it condenses into clouds and falls as rain (liquid) or solidifies into snow or ice (solid).
To learn more about how heat energy can change the physical state of matter, go to this website.
Heat is a process that occurs when matter increases in energy. Molecules in a solid such as ice are tightly packed together and move slowly. When the molecules heat up, they begin to move faster. They hit each other as well as bounce apart. The more they do this, the farther apart they become from each other. The solid changes state to become a liquid. The faster the molecules move, the higher the temperature. When the molecules are very far apart, a liquid such as water becomes a gas, water vapour. Heat can change the state of some types of matter such as water.
For example, consider Earth's water cycle. Heat energy from the Sun causes water to evaporate. Hot moist air rises. When the water vapour (gas) cools, it condenses into clouds and falls as rain (liquid) or solidifies into snow or ice (solid).
To learn more about how heat energy can change the physical state of matter, go to this website.