science vocab

Question 1

reference point

Answer 1

starting point you choose to describe the location or position of an object

Question 2

position

Answer 2

is an objects distance and direction from a reference point

Question 3

motion

Answer 3

the process of changing position

Question 4

displacement

Answer 4

the difference between the initial position and the final position of an object

Question 5

speed

Answer 5

a measure of the distance an object travels per unit of time

Question 6

constant speed

Answer 6

the rate of change of position in which the same distance is traveled each second

Question 7

instantaneous speed

Answer 7

the speed at a specific instant in time

Question 8

average speed

Answer 8

the total distance traveled divided by the total time taken to travel that distance

Question 9

average speed equation

Answer 9

total distance (m) / total time (s) = d

Question 10

velocity

Answer 10

the speed and direction of a moving object

Question 11

acceleration

Answer 11

a measure of the change in velocity during a period of time

Question 12

acceleration equation

Answer 12

m/s2 = final speed (m/s) - initial speed (m/s) / total time (s)

Question 13

force

Answer 13

a push or pull on an object

Question 14

contact force

Answer 14

a push or pull on an object by another that is touching it

Question 15

non contact force

Answer 15

a force that one object can apply to another object without contact

Question 16

gravity

Answer 16

an attractive force that exists between all objects that have mass

Question 17

mass

Answer 17

the amount of matter in an object

Question 18

weight

Answer 18

the gravitational force exerted on an object

Question 19

friction

Answer 19

a force that resists the motion of two surfaces that are touching

Question 20

net force

Answer 20

the combination of all the forces acting on an object

Question 21

balanced forces

Answer 21

forces acting on an object that combine and form a net force of zero

Question 22

unbalanced forces

Answer 22

forces acting on an object that combine and form a net force that is not zero

Question 23

inertia

Answer 23

the tendency of an object to resist change in its motion

Question 24

newtons second law

Answer 24

the acceleration of an object is equal to the net force acting on the object divided by its mass

Question 25

circular motion

Answer 25

any motion in which an object is moving along a circular path

Question 26

centripetal force

Answer 26

a force that acts in a circular motion perpendicular to the direction of motion, toward the center of the curve

Question 27

newtons third law of motion

Answer 27

every action has an equal opposite reaction ex. gymnast

Question 28

force pair

Answer 28

forces two objects apply on each other

Question 29

momentum

Answer 29

the measure of how hard it is to get an object to stop moving

Question 30

law of conservation of momentum

Answer 30

the total momentum of a group has the same momentum unless outside forces act on the group