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physical science unit 7 quizizz

Total questions: 76

Worksheet time: 2hrs 27mins

Name
Class
Date
1.
Why is the speed of objects increasing during free fall?
a)
They are getting heaver
b)
They are changing the shape
c)
The gravity is pulling them down
d)
There is no air resistance
2.
As mass decreases, gravitational force does what?
a)
Increases
b)
Decreases 
c)
Remains the same
d)
Changes
3.
What is the measure of force of gravity on an object?
a)
Shape
b)
Height
c)
Weight
d)
Gravity
4.
What is the rate of gravitational acceleration?
a)
9.8 m/s
b)
8.9 m/s
c)
9.8 m/s2
d)
8.9 m/s2
5.
In a vacuum, a rock and a feather will have a gravitational acceleration rate:
a)
both are 9.8m/s2
b)
the rock's is greater
c)
the feather's is greater
d)
Both are 0 m/s2
6.
Which objects have a STRONG force of gravity?
a)
Objects with GREATER mass, like elephants
b)
Objects with LESS mass, like mice
7.
What is the SI unit used to measure force? 
a)
pounds 
b)
grams 
c)
newtons 
d)
friction
8.
The force of gravity acting on an object is the object's ______.
a)
mass
b)
matter
c)
weight 
d)
friction 
9.
The amount of matter in an object is 
a)
pressure
b)
weight
c)
mass
d)
force
10.
Which of the following never changes no matter where in the universe?
a)
weight
b)
force
c)
mass
d)
pounds
11.
A person would weigh less on on the Moon than on the Earth because . . .
a)
Moon has more mass, and therefore more gravity
b)
Moon has less mass, and therefore more gravity
c)
Moon has more mass, and therefore less gravity
d)
Moon has less mass and therefore less gravity
12.
If Earth's mass was cut in half, what would happen to your mass?
a)
increase because gravitational force increases
b)
decrease because gravitational force decreases
c)
decrease because gravitational force increases
d)
nothing, mass is not affected by gravitational force
13.
As mass increases, what happens to gravitational force?
a)
increases
b)
decreases
c)
stays the same
d)
i don't know
14.

What is the weight of the object at 2 kg?

a)

2 N

b)

20 N

c)

20 kg

d)

2 kg

15.
The force of gravity on Jupiter is a little more than 2 times the gravitational force on Earth. If an object has a mass of 50 kg and a weight of 490 N on Earth, what would be the object's approximate mass and weight on Jupiter?
a)
50 kg and 490 N
b)
100 kg and 490 N
c)
50 kg and 980 N
d)
100 kg and 980 N
16.
Gravity attracts all objects towards one another.
a)
False
b)
True
c)
It depends
17.
What is gravity?
a)
A force
b)
Energy
c)
A push
d)
All of them
18.
Which has more mass, Earth or the Moon?
a)
Earth
b)
Moon
c)
The same
19.
Which has a STRONGER force of gravity, Earth or the Moon?
a)
Earth
b)
Moon
20.
Why can astronauts jump and float a little on the Moon?
a)
Because the Moon's gravity is NOT that STRONG.
b)
Because the Moon's gravity is VERY STRONG. 
21.
What is weight?
a)
The measure of how HEAVY something is.
b)
The measure of how much GRAVITY is pulling on an object.
c)
BOTH answers are correct.
d)
None of them.
22.
Which of the following is a unit of mass?
a)
kilogram
b)
liter
c)
meter
d)
pound
23.
Suppose an astronaut were to visit a planet where the gravity is half that of Earth.  His WEIGHT on that planet would be _______________.
a)
half his Earth weight
b)
the same as his Earth weight
c)
twice his Earth weight
d)
zero
24.
Mass is measured using a __________________.
a)
beaker
b)
graduated cylinder
c)
ruler
d)
balance scale
25.
In order to reduce the mass of a piece of matter, you would have to ____________________.
a)
lower its temperature
b)
take away some energy
c)
add some matter
d)
remove some matter
26.

Find the gravity for a planet when a 65 kg object weighs 2300 N. Enter your final rounded answer WITH a unit. Make sure to put a space between your numerical answer and unit.

(a)  

27.

The two types of energy listed under mechanical energy

a)

kinetic and nuclear

b)

potential and kinetic

c)

potential and nuclear

d)

wind and thermal

28.

Which letter shows where kinetic energy is at is highest point?

a)

X

b)

Y

c)

W

d)

Z

29.

Which of the following answer choices is NOT an example of potential energy?

a)

Running down a steep hill on vacation

b)

Holding a basketball in practice

c)

A drawn bow in an archer's hand

d)

A baseball at its highest point in the air

30.

Where is kinetic energy at its minimum?

a)

Z

b)

W

c)

X

d)

Y

31.

Energy in motion is called

a)

kinetic energy

b)

potential energy

c)

nuclear energy

d)

transfer energy

32.

Kinetic energy depends on_________ and _________.

a)

speed and mass

b)

speed and height

c)

height and mass

d)

energy and height

33.

Where is potential energy at its minimum?

a)

W

b)

X

c)

Y

d)

Z

34.

Energy that transforms from potential to kinetic is neither_____ nor _______.

a)

created, force

b)

created, destroyed

c)

force,motion

d)

destroyed, law of conservation of energy

35.

All of the answer choices are examples of kinetic energy Except-

a)

A volleyball player spiking a ball

b)

A race car speeding down the highway

c)

A bowling ball sitting on the rack

d)

A bowling ball rolling down the alley

36.

When stored energy begins to move the object______ energy from _______ to _________.

a)

energy, force, motion

b)

transfers, kinetic, potential

c)

forces, mechanical, nuclear

d)

transfers, potential,kinetic

37.

When a slingshot is in a held position it has

a)

mechanical energy

b)

potential energy

c)

kinetic energy

d)

radiant energy

38.

Which of the following is NOT an example of potential energy?

a)

A diver on the edge of a diving board

b)

A parachute falling to the ground

c)

A pencil sitting on a desk

d)

A car parked in the parking lot of a mall

39.

What numbers show potential energy on this pendulum?

a)

1 and 5

b)

1 and 4

c)

2 and 3

d)

3 and 4

40.

How much gravitational potential energy does a 100kg (220lb.) skydiver have if they jump from 4000 meters?

a)

3920000 J

b)

294 J

c)

180000 J

d)

1225 J

41.

A 6kg cat misjudges a jump and falls 5 meters. How much gravitational potential energy does the cat have? (The cat is fine by the way.)

a)

294 J

b)

180000 J

c)

1225 J

d)

3920000 J

42.

Calculate the potential energy of a car with a mass of 2,500 kg that is on a hill 100 meters above sea level.

a)

250,000 J

b)

2,450,000 J

c)

2,451,663 J

d)

248 J

43.

A 50kg person is running at 7m/s (about 16 mph). How much kinetic energy do they have?

a)

1225 J

b)

180000 J

c)

294 J

d)

3920000 J

44.

What is the unit of measurement for energy?

a)

Newton

b)

Watt

c)

Joule

d)

Metres

45.

A cheetah can run briefly with a speed of 31 m/s. Suppose a cheetah with a mass of 47 kg runs at this speed. What is the cheetah’s kinetic energy?

a)

1457 J

b)

728.5 J

c)

45,167 J

d)

22,583.5 J

46.
2. The diagram to the right represents a diver’s motion from the top of a high diving board into a pool of water. At what point does the diver have the greatest kinetic energy and the least potential energy?
a)
1
b)
2
c)
3
d)
4
47.
How much kinetic energy does a moving 6 kg object have if it moves with a velocity of 3 m/s?
a)
27 J
b)
18 J
c)
9 J
d)
2 J
48.

The coaster at B is at -

a)

Maximum PE, Minimum KE

b)

Minimum PE, Minimum KE

c)

Minimum PE, Maximum KE

d)

Maximum PE, Maximum KE

49.

The equation E = 1⁄2 mass x velocity2 is used to find which energy store?

a)

Kinetic Energy

b)

Gravitational Potential Energy

50.

The equation E = mass x gravity x height is used to find which energy store?

a)

Kinetic Energy

b)

Gravitational Potential Energy

51.

Which of the following has the largest kinetic energy?

a)
b)
c)
d)
52.
a)

A

b)

B

c)

C

d)

D

53.
The specific heat of aluminum is 0.21 cal/g°C.  How much heat(Q) is released when a 10 g piece of aluminum foil is taken out of the oven and cools from 100° to 50°?
a)
105 J
b)
10.5 J
c)
1.05 J
d)
50 J
54.
20 g of water. specific heat of water is 4.18 J/g°C.  temperature changes from 25° C to 20° C, how much heat energy (Q) moves from the water to the surroundings?
a)
418 Joules
b)
209 J
c)
83 J
d)
4.18 J
55.
The specific heat(c) of copper is 0.39 J/g °C. What is the temperature change(∆t) when 100 Joules of heat(Q) is added to 20 grams of copper?
a)
12.82 °C
b)
24.12°C
c)
351 °C
56.
How many Joules of energy are required to change 10 gram of water from 20 C to 90 C?
a)
1400 J
b)
2800 J
c)
210,000 J
d)
1,400,000 J
57.

The specific heat of platinum is 0.133 J/g°C. How much heat(Q) is released when a 10 g piece of platinum cools from 100°C to 50°C?

a)

66.5 J

b)

665 J

c)

0.0266 J

d)

0.665 J

58.
The amount of energy required to raise the temperature 1ºC for every kilogram is called____?
a)
Thermal Energy
b)
Specific Heat
c)
Temperature
d)
Kinetic Energy
59.
What unit do you use to measure Thermal Energy?
a)
J/Kg ºC
b)
Kg
c)
ºC
d)
J
60.
What is the symbol for Specific Heat
a)
Q
b)
t
c)
m
d)
C
61.
What is the equation to measure change in Thermal Energy?
a)
Q=mc∆t
b)
Q=mc
c)
Q= ∆mct
d)
m=QC
62.
Water has a specific heat of 4184 J/KgºC.  Wood has a specific heat of 1760 J/KgºC.  What material needs more energy to raise the temperature 1ºC
a)
Wood
b)
Water
c)
Both are the same
63.
Copper, Stainless Steel, Carbon Steel, and Zinc were all heated using the same thermal energy.  What material would be the coolest after being heated?
a)
Copper
b)
Carbon Steel
c)
Zinc
d)
Stainless Steel
64.
How does heat flow?
a)
Always from cold to warm
b)
Always from warm to cold
c)
Both warm to cold & cold to warm
d)
It depends on the temperature
65.
How many Joules of energy are required to change 10 gram of ice at -2 C to water at 20 C?
a)
440 J
b)
880 J
c)
10,140 J
d)
66,000 J
66.
How many Joules of energy are required to change 10 gram of water from 20 C to 90 C?
a)
1400 J
b)
2800 J
c)
210,000 J
d)
1,400,000 J
67.
A high specific heat means...
a)
It requires less energy to change temperature
b)
It requires more energy to change temperature
c)
It heats up very quickly
68.
When a  piece of aluminum foil is taken out of the oven and cools from 100° C to 50°C, What is the change in temperature?
a)
50°
b)
0°
c)
100°
d)
150°
69.
Which of the following would be the best insulator?
a)
air
b)
aluminum
c)
copper
d)
silver
70.

Newton's Universal Law of Gravitation explained about...

a)

Gravitational force

b)

Magnetic force

c)

Centripetal force

71.

What is the value of gravitation constant...

a)

3×108 ms−13\times10^8\ ms^{-1}

b)

6.67 ×10−11 Nm2kg−26.67\ \times10^{-11}\ Nm^2kg^{-2}

c)

6.63×10−9 Nm26.63\times10^{-9\ }Nm^2

72.

what is the factors that affect gravitational force

a)

mass, distance

b)

speed, distance

c)

momentum, mass

73.

what is the relationship between mass of object and distance between objects..

a)

mass increase, gravitational force increase

b)

mass increase, gravitational force decrease

c)

mass decrease, gravitational force increase

74.

Newton's Law of Universal Gravitation affects

a)

All objects with mass in the known universe

b)

All objects and empty space in the known universe

c)

Thoughts and Ideas

d)

Only things that are the color red

75.

If one of two objects increases its mass, it _________ the gravitational pull between the two objects

a)

increases

b)

decreases

c)

has no effect on

d)

eliminates

76.

Which is the formula for Newton's Law of Universal Gravitation?

a)

F = G * m1m2 / r

b)

F = G * m1m2 / r2

c)

F = G * m1m2 / 2r

d)

F = m1m2 / 2r

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