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Yr10 Science 2020

Total questions: 102

Worksheet time: 4hrs 21mins

Name
Class
Date
1.
What do these isotopes of carbon all have in common?
a)
neutrons & mass number
b)
atomic number and neutrons
c)
atomic number and electrons
d)
protons, atomic number, and mass number
2.
How many neutrons does the isotope of lithium have?
a)
8
b)
3
c)
4
d)
5
3.
How many protons does this isotope of titanium have?
a)
48
b)
22
c)
26
d)
70
4.
In a correctly written symbol what would be located in the "A" position?
a)
number of neutrons
b)
atomic number
c)
number of electrons 
d)
mass number
5.
What quantities vary between isotopes of an element?
a)
protons, electrons, and atomic mass
b)
protons, electrons, and atomic number
c)
neutrons and electrons
d)
neutrons and atomic mass
6.
which atom has  4 neutrons?
a)
Li-6
b)
Li-7
c)
Li-8
d)
they have the same # of neutrons
7.
How many neutrons in C-14?
a)
6
b)
7
c)
14
d)
8
8.
Isotopes are atoms of the same element with different #’s of __________ & therefore different __________.
a)
n0 ;  atomic #’s
b)
p+ ; atomic #’s
c)
e- ; atomic masses
d)
n0 ; atomic masses
9.
How many neutrons does the isotope below have?     89 36Kr
a)
53
b)
36
c)
89
d)
125
10.
If X is the symbol for an element, which of the following two symbols represent    isotopes of the same element?     I. 7735X  II. 7733X  III. 8137X  IV. 8135 X
a)
I and II
b)
III and IV
c)
I and IV
d)
I and III
11.
How many neutrons does an atom of the isotope Neon-22 have?
a)
12
b)
10
c)
22
d)
20
12.
Four isotopes of lead include lead-204, lead-206, lead-207, and lead-208.  The average atomic mass of lead is 207.2.  Which isotope of lead is likely to be the most abundant.
a)
204
b)
206
c)
207
d)
208
13.
An atom is electrically neutral when
a)
protons and neutrons are the same
b)
protons and electrons are the same
c)
neutrons and electrons are the same
d)
neutrons balance the protons and electrons
14.
Two isotopes of carbon are carbon-12 and carbon-14.  These isotopes differ from one another by two protons.
a)
true
b)
false
15.
The time it takes for 50% of the nuclei in a radioactive sample to decay to its stable isotope is called _____.
a)
the daughter product
b)
geologic time
c)
the half-life
d)
the half-time
16.
According to the graph, what fraction of the original parent isotope still exists after 3 half lives?
a)
0,5000 g
b)
0,2500 g
c)
0,1250 g
d)
0.0625 g
17.
If the half-life of a radioactive group of atoms is 100 years, then how old is the rock if there have been two half-lives?
a)
25 years
b)
200 years
c)
400 years
d)
800 years
18.
The graph shows the radioactive decay of a 50-gram sample of a radioactive isotope. 
 According to the graph, what is the half-life of this isotope? 
a)
100 years
b)
150 years
c)
200 years
d)
300 years
19.
The graph shows the decay of a radioactive material over time. 
 How long does it take for this radioactive material to decay through 2 half-lives? 
a)
1 x 103 years
b)
5 x 103 years
c)
10 x 103 years
d)
40 x 103 years
20.

In the equation, 146C --> 147N + 0-1B, the _______ decay of radioactive carbon-14 results in the creation of a new nitrogen-14 atom.

a)

Gamma

b)

Beta

c)

Alpha

21.
How is the alpha particle written in a nuclear equation?
a)
42He
b)
24He
22.
Uranium-238  decays into  Thorium-234  by emitting .........
a)
an alpha particle
b)
a beta particle
c)
gamma rays
d)
visible light
23.
Which type of nuclear radiation is being emitted here?
a)
Alpha
b)
beta
c)
gamma 
d)
none
24.
If we start off with element 24X50 after an alpha decay we get another element Y that looks like
a)
22Y50
b)
22Y46
c)
20Y48
d)
26Y54
25.
Solve this equation for alpha decay.
85209At = ___ + 24He
a)
83205Bi
b)
86209Rn
c)
81207Tl
d)
85208At
26.
Balance the following equation:
146C --> 0-1e + ________
a)
145B
b)
146C
c)
147N
d)
42He
27.
Solve this equation for alpha decay.
85209At = ___ + 24He
a)
83205Bi
b)
86209Rn
c)
81207Tl
d)
85208At
28.

Gamma rays have

a)

no mass

b)

a huge mass

c)

a small mass

d)

an average mass

29.
Solve this equation for beta decay.
614C = ___ + -10e
a)
410Be
b)
714N
c)
210He
d)
613C
30.
The diagram shows the path of radioactive rays, S and T. Which of the following shows the type of ray S and ray T?
a)
ray S= alpha.  ray T=beta
b)
ray S= alpha   ray T=gamma
c)
ray S= beta.    ray T=gamma
d)
ray S= gamma.  ray T= beta
31.

An isotope that undergoes B- decay has

a)

too few protons

b)

too many protons

c)

too few neutrons

d)

Too many neutrons

32.

Solve this equation for beta decay.

614C = ___ + -10e

a)

410Be

b)

714N

c)

210He

d)

613C

33.

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

34.

Lilly's cat ran through your yard. The cat has a mass of 5 kg. He is running at a speed of 3 m/s. What is the kinetic energy of the cat as he runs?

a)

8.5 J

b)

45 J

c)

7.5 J

d)

22.5 J

35.

A 5 Kg body is having a Kinetic energy of 250 J. What is the velocity of the body?

a)

10 m/s

b)

15 m/s

c)

20 m/s

d)

40 m/s

36.

What is the mass of a ball that has a kinetic energy of 115 J and is traveling at 9 m/s?

a)

1035 kg

b)

23.5 kg

c)

12.8 kg

d)

2.84 kg

37.

A exercise ball is on a table 2.5 m above the ground. What is the mass of the ball if it has a GPE of 56.8 J?

a)

71 kg

b)

22.72 kg

c)

142 kg

d)

2.32 kg

38.

Ty lifts a set of 1250kg weights a vertical distance of 2m in a weight lifting contest. What Potential Energy do the weights now possess?

a)

12,789 Joules

b)

24,500 Joules

c)

4,500 Joules

39.
Gravitational potential energy depends on the ________ and ________ of the object. 
a)
Height and mass
b)
Friction and movement
c)
Mass and Movement
d)
Height and Friction 
40.
How do you calculate power?
a)
P = W/t
b)
P = E/t
c)
P = w * t
d)
P = bbq/chicken
41.
How do we calculate work?
a)
W = F * d
b)
w = f * D
c)
W = F * D
d)
w = f * d
42.
The SI unit of work is?
a)
Joules
b)
Watts
c)
Newtons
d)
meters
43.
The SI unit for power is...?
a)
Watts
b)
Joules
c)
Newtons
d)
Meters
44.
A force exerted over a distance to move an object is ______________________.
a)
power
b)
work
c)
momentum
d)
Watt
45.
If 150 Joules of work is needed to move a box 10 meters, what force was used? 
a)
1500 N
b)
15 N
c)
1.5 N
d)
150 N
46.

At which point does the ball has the greatest gravitational potential energy (GPE)?

a)

A

b)

G

c)

D

d)

C

e)

G

47.

Energy stored because of gravity is called:

a)

Gravitational Potential Energy

b)

Kinetic Energy

c)

Mechanical Advantage

d)

Chemical Energy

48.

Which would have the LEAST gravitational potential energy (GPE)?

a)

A ball sitting on the ground

b)

Moon viewed from the Earth

c)

An airplane flying 30,000 feet above the ground

d)

A rock sitting on top of Mt. Everest

49.

How could you increase the gravitational potential energy of an object without changing its mass and gravity?

a)

Make the object larger

b)

Lower the object towards the ground

c)

Raise the object farther off the ground

d)

Allow the object to roll on the ground

50.

How could you increase the object's gravitational potential energy (GPE) without changing its distance from the ground (height) and gravity?

a)

Decrease the object's mass

b)

Increase the object's height

c)

Increase the object's mass

d)

Decrease the object's height

51.

____________ is the ability to do work.

a)

Energy

b)

Force

c)

Friction

d)

Motion

52.

You throw a ball into the air as shown in the diagram. At what point does the ball have the most gravitational potential energy?

a)

W

b)

X

c)

Y

d)

Z

53.

At which position does the child on the swing have the most gravitational potential energy?

a)

W

b)

X

c)

Y

d)

Z

54.

At which point on the roller coaster is the gravitational potential energy the greatest?

a)

W

b)

X

c)

Y

d)

Z

55.

What kind of energy is in a rock at the edge of a cliff?

a)

Gravitational Potential Energy

b)

Kinetic Energy

c)

Both potential and kinetic energy

d)

none of the above

56.

Which is the correct unit for expressing gravitational potential energy?

a)

Joule

b)

Newton

c)

m/s2

d)

meter

57.

Which of the following is the correct equation for calculating an object's gravitational potential energy?

a)

PE = mgh

b)

PE = mg / h

c)

PE = mg + h

d)

PE = gh

58.

What is the gravitational potential energy (GPE) of a 1 kilogram book that is 1 meter above the ground?

g = 9.8 m/s2

a)

9.8 Joules

b)

1.0 Joule

c)

0.10 Joule

d)

11.8 m/s2

59.

The highest inhabited town in the world has an elevation of 5334 m above sea level. What would be the gravitational potential energy of a 64 kg person in this town?

a)

341,376 J

b)

83.3 J

c)

3,345,484.8 J

d)

34,834.3 J

60.

An Olympic high jumper, with a mass of 82 kg, has a maximum gravitational potential energy of 1970 J. How high was the jump?

a)

24 m

b)

161,540 m

c)

2.5 m

d)

201 m

61.

The world record for pole vaulting is 6.15 m. I the pole vaulter’s gravitational potential energy is 4942 J, what is his mass?

a)

803.6 kg

b)

504.3 kg

c)

30,393.3 kg

d)

82 kg

62.

The formula for calculating the gravitational potential energy in an object is shown above. Which object will have the largest value for its GPE

a)
b)
c)
d)
63.

An object's gravitational potential energy store can be increased by...

a)

by lifting the object higher

b)

increasing the velocity (speed) of the object

c)

decreasing the size of the object

d)

decreasing the mass of the object

64.
The units for mass are...
a)
miles, mi
b)
kilograms, kg
c)
metres, m
d)
grams, g
65.
On a roller coaster, where is maximum kinetic energy?
a)
Near the bottom of a big hill
b)
When going around a corner
c)
When going upside down
d)
At the top of a big hill
66.

When a pendulum swings, at which point is kinetic energy greatest?

a)

1

b)

2

c)

3

d)

4

67.

What is happening to the potential energy between position 1 to 3?

a)

Decreasing

b)

Increasing

c)

Stays the same

68.

Which of the following is an example of kinetic energy decreasing as the gravitational potential energy increases?

a)

a person parachuting out of a plane

b)

a car racing around an oval track

c)

a person skiing down a hill

d)

a person walking up a hill

69.

What would have the greatest kinetic energy?

a)

A car driving down a hill.

b)

A person running down a hill.

c)

A ball rolling down a hill.

d)

leaves rolling down a hill

70.

At which point is the kinetic energy the greatest?

a)

W

b)

X

c)

Y

d)

Z

71.

What position has the least amount of potential energy?

a)

W

b)

X

c)

Y

d)

Z

72.

In order to INCREASE the potential energy of an object, you need to:

a)

put the object lower to the ground

b)

raise the object higher

73.
What kind of energy is in a person climbing a ladder?
a)
Potential
b)
Kinetic
c)
Both
74.
Where would a person have to be located to have the minimum gravitational potential energy?
a)
up on the roof
b)
down in the basement
c)
in the middle
d)
outside
75.
A 0.40 kilogram bird is flying at a constant speed of 8.0 m/s. What is the bird's kinetic energy ?
a)
3.2 J
b)
4.2 J
c)
2.0 J
d)
12.8 J
76.
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
77.
Conservation of energy states that energy cannot be ________ or ________, but can be altered from one form to another.
a)
created, destroyed
b)
gravity, force
c)
heat, created
78.
What are the two factors that affect kinetic energy?
a)
time and energy
b)
power and mass
c)
mass and speed
d)
time and work
79.
Which of the following is an exmaple of a change of kinetic energy into gravitational potential energy?
a)
a person parachuting out of a plane
b)
a car racing around an oval track
c)
a person skiing down a hill
d)
a person walking up a hill
80.
On a roller coaster, where is maximum potential energy?
a)
At the bottom of a big hill
b)
When going around a corner
c)
When going upside down
d)
At the top of a big hill
81.
On a roller coaster, where is maximum kinetic energy?
a)
At the bottom of a big hill
b)
When going around a corner
c)
When going upside down
d)
At the top of a big hill
82.
At what position does the rock have the greatest kinetic energy?
a)
A
b)
B
c)
D
d)
E
83.
Explain what happens to the potential energy of a rock as it falls off the side of a cliff.
a)
The kinetic energy decreases as the potential energy increases.
b)
The kinetic energy decreases as the potential energy decreases.
c)
The potential energy decreases as the kinetic energy increases.
d)
The potential energy decreases as the kinetic energy decreases. 
84.
When riding a roller coaster, you go up and down many hills. As you get to the top of a roller coaster, what energy change is taking place.
a)
Potential energy is changed into kinetic energy.
b)
Kinetic energy is changed into potential energy.
c)
Chemical energy is changed into heat energy.
d)
Heat energy is changed into chemical energy. 
85.

Which passenger has the most potential energy?

a)

A

b)

B

c)

C

d)

D

86.

If these are all moving at the same speed, the vehicle with the greatest KE would be

(Think about their sizes)

a)
b)
c)
d)
87.
How can I gain potential energy? (choose the best answer)
a)
Run a mile
b)
Walk up the stairs
c)
Climb a mountain
d)
Go down the stairs
88.

This graph depicts what type of relationship between kinetic and potential energy?

a)

Non-Linear

b)

Linear

c)

Inverse

d)

Poly-atomic

89.

According to this graph, as kinetic energy decreases, potential energy must?

a)

Increase

b)

Decrease

c)

Stay the same

90.

According to this graph, as kinetic energy decreases, potential energy must?

a)

Increase

b)

Decrease

c)

Stay the same

91.

Based on the diagram of a roller coaster car on a roller coaster track, what statement is true?

a)

The car at point A has more kinetic energy than the car at point C

b)

The car at point C has less kinetic energy than the car at point B.

c)

The car at point C has more kinetic energy than the car at point B.

d)

The car at point D has less potential energy than the car at point B.

92.

How can we increase the gravitational potential energy of the car?

a)

Strap a boulder to the car so that it weighs more.

b)

Keep the length of the hill at 50 m but only 5 m tall.

c)

Take the interior out of the car so that the car has less mass.

d)

Keep the hill at 10 m tall but increase the length of the hill so that the car has farther to roll.

93.

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

94.

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

95.

What is the unit for force?

a)

kilogram (kg)

b)

meter (m)

c)

Newton (N)

d)

Joule (J)

96.

What is the unit for energy?

a)

kilogram (kg)

b)

meter (m)

c)

Newton (N)

d)

Joule (J)

97.

What is the formula for speed?

a)

distance / time

b)

mass x acceleration

c)

velocity / time

d)

½(mass) x (velocity)2

e)

(mass) x (acceleration of gravity) x (height)

98.

The most GPE is at

a)

a

b)

b

c)

c

d)

d

99.

The least amount of potential energy is at

a)

a

b)

b

c)

c

d)

d

100.

Imagine both balls fall off the table at the same speed. Which colour ball has more kinetic energy?

a)

Red

b)

Green

c)

They have the same amount

d)

Neither balls have kinetic energy

101.

Which is the Potential energy from most to least on the stairs?

a)

D, C, B, A

b)

A, B, C, D

c)

C, B, A D

d)

D, A, B, C

102.

Which is the Potential energy from least to the greatest on the stairs?

a)

D, C, B, A

b)

A, B, C, D

c)

C, B, A D

d)

D, A, B, C

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