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Chemistry unit 3 rev
review of chemistry unit 3
Question | Answer |
---|---|
What is a particle? | A particle is the smallest piece of any substance that is still that substance. |
What is compression? | Compression means: to press or force a substance into a smaller space or volume. |
What is expansion? | Expansion is an increase in volume. |
How do air particles move in a closed syringe system when the plunger is compressed? | All gas particles move faster and hit harder when they are compressed. |
How do air particles move in a closed syringe system when the plunger is expanded? | All gas particles move slower and hit softly when the volume of air is expanded. |
What are the 3 phases of matter? | The 3 stages of matter are: solid, liquid, and gas. |
How do gas particles move? | Gas particles have a lot of empty space around them.They move independently and can be compressed into a smaller space. |
How do liquid particles move? | Particles in a liquid are touching and can move over and under each other.That allows liquid to flow. |
How do solid particles move? | Particles in a solid are touching and bonded tightly.When particles can't move their size and shape stays the same. |
Why did the blue cube get smaller in our class experiment? | Air particles can't enter the closed cell.The air particles in the syringe was compressed- pressing the air particles in the syringe AND the cube closer together. |
What is between gas particles? | There is NOTHING between gas particles but EMPTY SPACE. |