Science Exam 1

Question 1

science definition

Answer 1

process (on-going)of investigating the world and organizing that knowledge into logical structures

Question 2

science is something you _____

Answer 2

do

Question 3

scientific method

Answer 3

observation, state a problem, hypothesis, experiment, results, draw conclusion

Question 4

physics was an idea put out by who

Answer 4

Ernest Rutherford

Question 5

physics is considered the _________ idea of science

Answer 5

fundamental

Question 6

a referent is

Answer 6

something agreed upon, common, used for comparison purposes

Question 7

measurement is

Answer 7

a process to compare a property to a well-defined and agreed upon referent

Question 8

what are the the two measurement systems

Answer 8

metric and English

Question 9

why was the English system not very accepted?

Answer 9

It was not easily agreed upon because it used the body as a measuring tool and the body is not consistent. One person might have measured something using 3 of their feet yet another used 5 of their feet to measure the same object.

Question 10

data is

Answer 10

measurement information used for description

Question 11

ratio is

Answer 11

a relationship between two numbers

Question 12

density is the ratio of _______ to ________

Answer 12

mass to volume

Question 13

matter is anything that

Answer 13

takes up space and has mass

Question 14

who came up with the ideas behind motion which in turn led him to advocate for the existence of God

Answer 14

St. Thomas Aquinas

Question 15

measuring motion is related to two factors which are…

Answer 15

changes in position and changes in time

Question 16

3 important combinations of length and time are

Answer 16

speed, velocity, acceleration

Question 17

speed is defined as

Answer 17

a change in position with respect to time

Question 18

most common measurement for speed is called

Answer 18

average speed

Question 19

time interval approaches 0 speed is called (also known as the speed something was going at a moment in time)

Answer 19

instantaneous speed

Question 20

equation for ______ can also be written as v=d/t

Answer 20

speed

Question 21

scalars

Answer 21

measurement with magnitude (number and unit) only (this is it might have speed but not distance yet. It is just the speed minus the distance)

Question 22

velocity

Answer 22

describes speed and direction (how fast is it going and where is it going?)

Question 23

vector

Answer 23

length=magnitude; arrows=directions

Question 24

——>
————>
Is this a vector?

Answer 24

No because it is not the same lenth. They are both scalars.

Question 25

a resultant comes from 2 or more ________

Answer 25

vectors

Question 26

------>------------> 4m/s 3m/s= 7m/s What is this an example of

Answer 26

a resultant

Question 27

4m/s <----------- ---------> 3m/s How would this be solved?

Answer 27

4m/s - 3m/s = 1m/s

Question 28

displacement

Answer 28

length of straight line between points, a resultant (has magnitude and direction) (think about a right triangle and the hypotenuse is what displacement refers to)

Question 29

acceleration

Answer 29

rate at which motion changes, (speed can change, direction can change, both speed and direction can change)

Question 30

why do things move?

Answer 30

force

Question 31

who was Aristotle

Answer 31

came up with ideas related to force

Question 32

a natural force is

Answer 32

what naturally happens to an object (the falling of a rock)

Question 33

an applied force is

Answer 33

what we do to the object (the throwing of the rock)

Question 34

some of Aristotle's ideas included

Answer 34

heavy objects fall faster than light, objects falling horizontally require continuously applied force. He only relied on thinking, not facts

Question 35

Galileo and Newton's contributions to force

Answer 35

all objects fall at the same rate, no force required for uniform horizontal motion, reasoning based on measurements

Question 36

inertia

Answer 36

tendency of an object to remain in unchanging motion or at rest in the absence of an unbalanced force

Question 37

Force

Answer 37

a push or pull capable of changing an object's state of motion

Question 38

type of flight t_____

Answer 38

thrust

Question 39

thrust (flight)

Answer 39

force that propels an airplane thru the air or before takeoff

Question 40

type of flight d____

Answer 40

drag

Question 41

drag (flight)

Answer 41

a mechanical force (air resistance that can help the airplane slow down)

Question 42

type of flight w_____

Answer 42

weight

Question 43

weight (flight)

Answer 43

force produced on an airplane by the Earth's gravitational pull (helps pull the plane toward the ground so it doesn't fly away high in the sky)

Question 44

type of flight l____

Answer 44

lift

Question 45

lift (flight)

Answer 45

force that keeps the airplane in the air by directly opposing its weight

Question 46

Bernoulli's principle

Answer 46

an increase in the velocity of a stream of fluid results in a decrease in pressure

Question 47

4 fundamental forces

Answer 47

gravitational, electromagnetic, weak nuclear, strong nuclear

Question 48

law for falling bodies

Answer 48

all falling bodies experience a constant acceleration

Question 49

velocity increases at a _______ rate

Answer 49

constant

Question 50

what does SI units stand for

Answer 50

system international

Question 51

acronym for metric conversions

Answer 51

King Henry Died by Drinking Chocolate Milk

Question 52

what is falling bodies

Answer 52

all bodies in free fall (without air resistance) experiences a constant acceleration

Question 53

what does "g" stand for

Answer 53

gravity (also used as the acceleration downward of a problem)

Question 54

compound motion

Answer 54

two forces act on the same object

Question 55

law of compound motion/independent vectors

Answer 55

horizontal and vertical motions are independent of each other