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Matter States and Atoms
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Matter States and Atoms
A science team is testing materials for a tiny weather station. Use particle ideas to explain how matter behaves. Read each task carefully; answer in complete sentences when asked.
Particle Models
Use your science knowledge about how particles are arranged and move in solids, liquids, and gases.
1.The weather station's metal bracket keeps its own shape and volume. Which state of matter is it, and how are its particles arranged?
2.A sealed syringe contains air. When the plunger is pushed in, the air takes up less space. Which particle property makes this possible?
- Gas particles have large spaces between them.
- Gas particles are fixed in place.
- Gas particles have no mass.
- Gas particles are bonded into a solid.
3.A drop of water is poured from a narrow tube into a wide dish. What changes about the water, and what stays the same?
Atoms, Molecules, and Motion
Use the vocabulary of matter to solve the team's notes.
4.Complete the note: An is the smallest unit of an element that keeps that element's properties. A is made of two or more atoms joined together.
5.True or false? The atoms in a solid stop moving completely. Correct the statement if it is false.
TrueFalse
6.A cold bottle warms up on a sunny windowsill. What happens to the average kinetic energy and motion of the bottle's particles as its temperature rises?
7.Ice in a glass melts into liquid water. Did the water molecules turn into different molecules, or did their arrangement and movement change? Explain.
Explain the Evidence
Apply particle ideas to a new situation.
8.A sealed balloon is placed in a warm room. It grows slightly larger. Use particle motion to explain why the gas can push outward on the balloon.
9.A lab partner says, “A liquid has no definite volume because it changes shape.” Is the claim correct? Use the difference between shape and volume to support your answer.
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