unit 1
what is the formula for velocity
distance / time
how many laws of motion are there
3
name two types of waves
electromagnetic, mechanical, longitudal
what are the states of matter
solid, liquid, gas, and plasma
what is a compound
a substance that is made of two or more elements
what was robert hooke most known for
discovering cells
what type of force is friction
a contact force
what force attracts two things together or pulls the apart
magnetic force
what is the formula for density
mass/volume
what are two popular types of models
stick and ball and space filling models
how old was newton when he discovered gravity
23
what is an unbalanced force
forces that cause a change in the motion of an object
what is kinetic energy
Kinetic energy is the energy of mass in motion
is changing color a chemical change?
yes
what are the types of mixtures
homogeneous and heterogeneous