1.07 States of Matter

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States of Matter Review

In this lesson, you learned about the 4 states of matter. Answer the following questions by choosing the best correct answer.

1. On a beautiful, clear night, Elinor and her mother look at the stars in the sky. What state of matter is found in the stars?
   
   1. plasma
   2. solid
   3. liquid
   4. gas
   
   Answer: Plasma. Stars are big balls of gases at really high temperatures. The high temperatures cause atoms to develop a charge and create plasma.



2. There are 4 states of matter that appear in nature. Which three states are the most common on earth?
   
   1. liquid, gas, plasma
   2. gas, solid, liquid
   3. liquid, plasma, solid
   4. plasma, gas, solid
   
   Answer: Gas, solid, liquid are the most common states of matter found on earth.



3. Wyatt takes his glass of iced tea to sit beside the pool. Name the states of matter he is carrying in the glass.
   
   1. gas, solid, liquid
   2. plasma and solid
   3. solid and liquid
   4. liquid, gas, plasma
   
   Answer: The states of matter he is carrying are solid and liquid. The ice is solid and the tea is liquid.



4. Most substances react the same during phase changes. Which substance undergoes anomalous expansion during the freezing phase change?
   
   1. water
   2. railroad tracks
   3. brass
   4. helium
   
   Answer: Water undergoes anomalous expansion during freezing.



5. Which state of matter contains particles that only vibrate in the same fixed position?
   
   1. plasma
   2. solid
   3. liquid
   4. gas
   
   Answer: A solid's particles are stuck in a fixed position so they can only vibrate in the same fixed position.



6. Which state of matter contains particles are close together but are able to move around each other slowly?
   
   1. plasma
   2. solid
   3. liquid
   4. gas
   
   Answer: A liquid's particles move around each other randomly and slowly.



7. Which state of matter contains particles are able to bounce all over their container freely?
   
   1. plasma
   2. solid
   3. liquid
   4. gas
   
   Answer: The particles of a gas have a lot of energy so they are often seen bouncing around in their container.