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Water. What does an ice cube taste of? What color is it? Read and think. One, why does water change

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state? Water is an example of matter. It is a substance made from hydrogen and oxygen. Water

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is odorless, colorless, and tasteless. It exists in all three states, solid, liquid, and gas.

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water is in a gas state at temperatures of over 100 degrees celsius when water is a gas it expands

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to occupy as much space as possible which we learned is what gases do water when water is in

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a liquid state between 1 degree celsius and 99 degrees celsius

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when water is in a liquid state, it takes the shape of the container, which we also learned

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on the previous page. Water is in a solid state at the temperatures below zero degrees Celsius.

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When water is solid, it expands to occupy more space. It has a bigger volume. Changes of state

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in water. When you heat solid water, it changes into a liquid because water melts. When you cool

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liquid water, it changes into a solid, so the water then freezes, like when you make ice cubes in the

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freezer. When you heat liquid water, it changes into water vapor, which is gas. Water evaporates.

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When you cool water vapor, it changes into a liquid because water condenses.

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Heat is the energy exchanged, so exchange, between two substances at different temperatures.

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When temperature increases or decreases, matter can change from one state to another.

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For example, to make ice, we lower the temperature of water until it freezes.