JLC 4th Grade Science Chapter 11 Changes in Matter
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| What is an atom? | The smallest possible particle of an element
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| Describe the meaning of a compound? | A substance made of two or more kinds of atoms that are chemically combined.
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| What is an element? | A substance made of just one kind of atom.
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| What is a change of state? | A physical change that occurs when matter changes from one state to another.
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| Describe a chemical change. | A change that results in the formation of new substance.
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| What is a physical property? | A trait of a substance by itself.
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| Describe a physical change. | A change that does not result in a new substance.
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| Which property involves how a substance interacts with other substances? | chemical property
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| Name a common physical property of nonmetal. | brittle
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| Name a chemical property of a substance. | reacts with oxygen
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| Examples of elements. | iron, gold, silver
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| Example of chemical reaction | Hydrogen and oxygen combine to form water.
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| What happens when something is boiling? | water changes to gas when heated
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| An example of matter. | paper
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| examples of compounds. | salt, sulfur dioxide, water
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| You heat a solid and at 52 degrees C it melts and turns to liquid. Predict: What will happen when the liquid cools below 52 degree C? | The liquid will change back into a solid as it reaches freezing point.
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| You mix metal shavings that are magnetic with powder Then separate the metal shavings from powder with a magnet. Explain if a chemical reaction did or did not take place? | The properties of the metal stayed the same and the two substances did not react to form a new substance.
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| Is a spoonful of salt is dissolved in a glass of water a physical or chemical change? Explain | When the water evaporates just salt remains in the same state as before being mixed with water. A chemical change would make a new substance.
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| What do you predict would happen if you put an iron nail in a bottle with water for a few days? | Oxygen and water would cause the nail to rust
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| What do you predict will occur if you place an iron nail in a container with just air? | Oxygen alone does not cause a nail to rust.
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