##### Science Finals

0
Set Details Share
created 6 years ago by tom114647
31 views
Page to share:
Embed this setcancel
COPY
code changes based on your size selection
Size:
X
1

Parts of the Scientific Method

Problem, Hypothesis, Observation, Experiment, Conclusion

2

What is the Independent Variable

What you introduce and test, what changes

3

What is dependent Variable

The results that you observed, what is affected

4

What is constants

Things held the same so they don't interfere with you IV

5

What form to we use to write a good hypothesis

If... then,

6

How many variables should you test in an experiment

One

7

How do we record time

Sec, minutes, hours, days, weeks, ect

8

How do we convert time units

60sec= 1 min, 60min= 1hr

9

How do we measure distance

m, cm, inch, yards, km

10

what is the English system

used by us, inches, feet, miles

11

What is the metric system

powers of ten, cm, m, km

12

What system do we use in science

metric

13

What is speed

how much distance is covered in a certain amount of time

14

How do we calculate speed, the equation

s= d/t

15

What are the proper units for speed

m/sec, mi/hr

16

what is velocity

speed with direction

17

What is a model, why do we use it

used to represent information, to interpret info

18

What is slope

rise/run

19

What is the difference between agervange and instantaneous speed

average is whole trip, instantaneous is smaller time interval

20

What is acceleration, equation

change in velocity over time, a= v/t

21

what are proper units for acceleration

m/sec/sec

22

what is deceleration

negative acceleration

23

what is the slope of the position vs time graph

velocity

24

what are some of Newtons important discoveries

gravity, calculus, universal law of gravitation

25

Newtons 1st law

object in motion stays in motion....

26

example of 1st law

ball rolling down hill stops at bottom due to friction

27

what is inertia

tendency of an object to stay at rest/ in motion

28

what is force

a push or a pull

29

newtons 2nd law

f=ma

30

what does N represent

kgm/sec/sec

31

difference between mass and weight

mass is amount of matter in an object, weight reflects gravity

32

proper unites for weight

g/kg

33

proper units for weight

pounds/ lbs

34

what are balanced and unbalanced forces

balanced= no motion, unbalance= motion

35

what is gravity

force of attraction between objects with mass

36

what is acceleration due to gravity on earth

9.8/m/sec/sec

37

what is the law of universal gravitation

all things with mass feel force of gravity on each other

38

what is friction

force against direction of movement

39

what causes friction

movement

40

what are the four types of friction

air, viscous, sliding, rolling

41

newtons 3rd law

for every action there is an opposite and equal reaction

42

what is momentum

P= mv

43

what is a machine

a device with moving parts that work together to accomplish a task

44

what is a simple machine

unpowered mechanical device

45

what is input

what you put into a machine

46

what is output

what the machine does for you

47

what are the three simple machine

pulley, lever, wheel and axle, ramp, axle

48

output force/ input force , how much your machine does for you

49

how does friction affect mechanical advantage in a machine

decreases MA

50

1st class lever 51

2nd class lever 52

3rd class lever 53

what is a pulley and how does it work

black and tackle, more strings the easier