2.
mixture of gases forming a layer around earth
3.
all solid rock and mineral on earth
5.
distance light travels in a year
6.
orbit of an object around another object
7.
spin of an object around its axis
9.
causes mountains and volcanoes
10.
causes seafloor spreading
11.
total force acting on an object
12.
push or pull of an object
13.
process of changing position
14.
force that resists the motion of two surfaces that are touching
15.
net force that does equal zero
16.
net force that does not equal zero
17.
measure of change in velocity during a period of time
18.
speed and direction of a moving object
19.
measure of distance and object travels
23.
heat transfer through direct contact
24.
heat transfer through fluids
25.
heat transfer through waves
28.
fossil fuels, food, battery
30.
car, skateboard, airplane
33.
light, electromagnetic waves, radio
