# science cards 1

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1. educated guess using what you know and what youve observed
hypothesis
2. amount of space occupied by an object
volume
3. push or pull that one body exerts on another
force
4. force that opesses motion between two touching surfaces
friction
5. states that any two masses exerts an attractive force on each other, the amount of which depends on the mass of the two objects and the distance between them
law of gravitation
6. organized procedure for testing a hypothesis that tests the effect of one thing on another under controlled conditions
experiment
7. distance an object travels per unit of time
speed
8. sum of the forces that are acting on an object
net force
9. acceleration of an object toward the center of a curved or circular path
centripetal acceleration
10. speed of an object at a given point in time, which is constant for an object moving at a constant speed and is different at each point in time for an object that is slowing down or speeding up
11. factor that can cause a change in the results of an experiment
variable
12. describes the speed and direction of a moving object
velocity
13. forces on a body that are equal in size and opposite in direction and do not change the motion of the body
balanced force
14. a force directed toward the center of a cirlce for an object moving in a circular motion
centripetal force
15. property that a moving object has because of its mass and velocity
momentum
16. a variable that does not change, when other variables change in an experiment
constant
17. rate of change of velocity, which occurs when an object speeds up, slows down, or changes direction
acceleration
18. resistance of an object to a change in its motion
inertia
19. gravitional force exerted on an object by earth
weight
20. total distanc that an object travels divided by the total time it takes to travel that distance
average speed
21. liters to mili-liters
• l>mL
• mutiply times 1000
22. mili-liters to liters
• mL>L
• divide by 1000
23. celios to kelvin
• c>k
• celios plus 273= kelvin
24. kelvin to celios
• k>c
• kelvin - 273= celios
25. momentum
• p=mv
• momentum= mass x velocity
26. speed
• s= d/t
• speed= distance/time
27. acceleration
• a= (Vf-Vi)/t
• acceleration= (final velocity-initial velocity)/time
28. velocity
• v= p/m
• velocity= momentum/mass
29. mass
• m= p/v
• mass= momentum/velocity
30. newton's 1st law of motion
• object moving at a constant velocity keeps moving at that velocity until a net force acts on it
• if npo forces are acting on a moving object, it continues to move
31. newton's 2nd law of motion
• all the forces added together is the net force
• net force acting on an object causes the object to accelerate in the direction of thr net force
32. newton's third law of motion
• when one object exerts a force on a second object, the second object exerts a force of the first that is equal in size and opposite in direction.
• every action has a seperate and opposite reaction
 Author: daraxoxo19@aim.com ID: 49287 Card Set: science cards 1 Updated: 2010-11-13 21:51:06 Tags: science comp review Folders: Description: flashcards doing stuff Show Answers: