What are the three states of matter?
solid, liquid, gas
The particles are tightly packed
solid
The particles can move a little
liquid
The particles can move freely
gas
What is happening?
melting
What is happening?
evaporation
What is happening? liquid -> solid
freezing
chemical change or physical change?
chemical change
chemical change or physical change?
physical change
chemical change or physical change?
chemical change
chemical change or physical change?
physical change
Who is it?
Newton
How many laws of motion did Newton have?
3
Newtons law 1: Inertia. What happens if a ball is moving?
it will move forever unless there is a force
Newton law 2: If an object is heavy, does it need more or less force?
MORE (more mass = more force)
Newton law 3: Every action has an ______ and opposite reaction
equal
