Science Unit 3 Vocabulary 8th grade

3. of force and acceleration – Newton’s 2nd law; when a force acts upon an object that has a constant mass, the object will accelerate in the same direction as the force applied
4. – change in an object’s motion (speed and/or direction); caused by unbalanced forces; measured in m/s2
6. – a measure of the amount of matter in a sample
8. the resistance that one surface or object encounters when moving over another
9. forces - a situation where the forces acting on an object are not equal in magnitude or direction, resulting in a net force that is not zero, causing the object to change its state of motion (accelerate, speed up, slow down, or change direction)
13. of inertia – Newton’s 1st law; the tendency of an object to resist change in motion unless acted upon by an outside net force
14. the rate at which someone or something is able to move or operate.

1. at the same time.
2. the SI unit of force. It is equal to the force that would give a mass of one kilogram an acceleration of one meter per second per second and is equivalent to 100,000 dynes.
5. - the force that attracts a body toward the center of the earth
7. – a push or pull acting on an object
10. forces- when two or more forces acting on an object are equal in magnitude but opposite in direction, effectively canceling each other out and resulting in no net force
11. of action-reaction – Newton’s 3rd law; for every action, there is an equal and opposite reaction
12. force – measurement of the total forces exerted on an object; measured in Newtons (N)