Vocabulary
What do we call the tiny building blocks that make up all matter?
Particles
What happens to gas particles when you push the plunger down on a syringe?
They move closer together (compression)
True or False: Gas is matter.
True
What is pressure in a gas caused by?
Particles colliding with container walls
What is one sign that a chemical reaction has happened?
A new substance is formed
An increase of volume
What happens to gas particles when you pull the plunger up?
They move farther apart (expansion)
How are gas particles arranged compared to solids and liquids?
They are far apart and move freely
What happens to air pressure when you compress gas into a smaller space?
It increases
Bubbles form when two liquids are mixed. What is that evidence of?
Gas is produced
What do we call matter that has no definite shape or volume?
Gas
When gas is compressed, does the number of particles change?
No, only the space between them changes
What is between the particles in a gas?
Empty space
Why does air rush out of a balloon when you pop it?
Gas moves from high to low pressure
When baking soda and vinegar react, what fills up the balloon?
Carbon dioxide gas
When you push down on a syringe, the gas inside is being _______.
Compressed
Why does a balloon get bigger when more air is added?
Gas particles move apart and take up more space
Why do gas particles move faster in a warm room than in a cold one?
Heat energy makes them move faster
When the plunger on a syringe returns to its original position, what does that show?
Pressure inside and outside are equal (equilibrium)
True or False: All reactions make bubbles or change color.
False
Name three phase of matter.
Solid, Liquid, and Gas
Describe how the particle model explains why a basketball bounces better when it’s full of air.
Compressed gas particles push outward, creating higher pressure
What happens to the motion of gas particles when they are cooled down?
They slow down and move closer together
At equilibrium, what is true about particle collisions on both sides of the plunger?
They’re balanced
Explain why the balloon inflates in a closed system when a reaction happens inside.
Gas particles are created and take up more space, pushing the balloon outward