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Matter & Energy

Total questions: 68

Worksheet time: 34mins

Name
Class
Date
1.

In an endothermic reaction, energy is _________.

a)

absorbed

b)

released

2.

Solid --> liquid --> gas, is what type of change?

a)

endothermic

b)

exothermic

3.

gas --> liquid --> solid; is what type of change?

a)

endothermic

b)

exothermic

4.

Ice cubes in your glass of soda melt. The ice is undergoing what type of change?

a)

endothermic

b)

exothermic

5.

Your family uses candles to see when the electricity goes out. The wax candle is undergoing what type of change?

a)

exothermic

b)

endothermic

6.

A sunflower makes food during photosynthesis. The production of glucose/food is what type of change?

a)

exothermic

b)

endothermic

7.

You freeze juice to make ice pops. The juice is undergoing what type of change?

a)

exothermic

b)

endothermic

8.

A school bus burns gasoline to create energy for motion while delivering students to school. The gasoline is undergoing what type of change?

a)

exothermic

b)

endothermic

9.

A reaction occurs in a test tube you are holding; it started out at about room temperature but then it starts to feel cold to you. What type of change is occurring in the test tube?

a)

endothermic

b)

exothermic

10.

A reaction that has a negative ΔH value.

a)

endo

b)

exo

11.

When this type of reaction occurs, the surrounding temperature goes up if the energy goes to KE.

a)

endothermic

b)

exothermic

12.

The condensation of water is what type of process?

a)

endothermic

b)

exothermic

13.

You must add heat to this type of reaction in order for it to occur.

a)

endothermic

b)

exothermic

14.

Sublimation of a solid, is what type of process?

a)

endothermic

b)

exothermic

15.

_____________ is the tool used to measure temperature.

a)

A thermometer

b)

A scale

c)

A ruler

d)

none of the above

16.

The prefix "exo" means

a)

"in"

b)

"out"

c)

"up"

d)

"down"

17.

The prefix "endo" means

a)

"in"

b)

"out"

c)

"up"

d)

"down"

18.

A high specific heat means...

a)

It heats up more quickly with added energy than something with a low specific heat

b)

It requires more energy to change its temperature than something with a low specific heat

19.
What  is the formula to calculate heat energy required to raise the temperature of any substance?
a)
Q = m Cp ∆T
b)
Q = m Cp
c)
Q =  ½ m v
d)
m = Q Cp
20.
There are four cups of hot cocoa. The cup sizes are shown. The temperature of the cocoa in each cup is 25 degrees celsius. Which cup has the MOST thermal energy?
a)
Large cup (Trenta)
b)
Small cup (Tall)
c)
Venti
d)
All three are the same temperature so they have same thermal energy
21.
What would be the effect on the particles if more heat is supplied to the system?
a)
They would slow down
b)
They would stop moving
c)
They would speed up
d)
There would be no effect
22.
The specific heat is the amount of energy needed to raise the temperature one degree Celsius of 1 gram of a substance.
a)
True
b)
False
23.
___________ is measured by the unit Joules.
a)
Heat energy
b)
Temperature
c)
Specific heat
24.

What is happening between D and E?

a)

Melting

b)

Boiling

c)

Condensing

d)

Freezing

e)

Sublimation

25.

What is happening between B and C?

a)

Melting

b)

Boiling

c)

Condensing

d)

Freezing

e)

Sublimation

26.

What is happening between A and B?

a)

The KE is increasing

b)

The PE is increasing

c)

The KE is decreasing

d)

The PE is decreasing

27.

What does section B show?

a)

Melting

b)

Boiling

c)

Condensing

d)

Freezing

e)

None of these options

28.

Which will heat up faster?

a)

copper

b)

granite

c)

iron

d)

basalt

29.

Which will heat up slower?

a)

water

b)

lead

c)

granite

d)

iron

30.

Which of the following best explains why the sand at the beach is hotter than the water?

a)

Sand has a higher specific heat than water.

b)

Sand has a lower specific heat than water.

c)

There is more water than sand at the beach.

d)

There is more sand than water at the beach.

31.
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
32.
What is the phase change of a solid to a liquid?
a)
freezing
b)
melting
c)
boiling
d)
condensation
33.

5. What is it called when a gas turns directly into a solid?

a)
Sublimation
b)
Condensation
c)

Freezing

d)

Deposition

34.
What happens to particles when they are heated?
a)
They speed up and spread out
b)
They slow down and compress
c)
They stop moving
d)
They move closer together and speed up
35.

The phase change from liquid water to gaseous water only at the surface of the liquid is called...

a)
evaporation
b)
precipitation
c)

boiling

d)
sublimation
36.

Between which two points is a liquid heating up?

a)

A ----> B

b)

B ----> C

c)

C ----> D

d)

D ----> E

e)

E ----> F

37.
Between which points is the temperature of the substance remaining constant?
a)
A-B only. 
b)
A-B, C-D, E-F
c)
B-C only. 
d)
B-C, D-E
38.
A substance's heating curve is shown in the graph.  What is its boiling point?
a)

100o C

b)

60o C

c)

20o C

d)

-60o C

39.

The graph shows a cooling curve for an unknown substance.  What is happening during segment BC?

a)
boiling
b)
condensation
c)
freezing
d)
melting
40.

In which of the following segments is the kinetic energy remaining constant?

a)
A-B
b)
B-C
c)
C-D
d)

D-E

e)

E-F

41.

What is happening to the particles in the substance between points A and B?

a)

Melting

b)

Freezing

c)

Speeding Up

d)

Slowing Down

42.

Where on the graph are phase changes taking place?

a)

1

b)

2

c)

3

d)

4

e)

5

43.
Change from Liquid to Solid is call......
a)
fusion
b)
Freezing
c)
sublimation
d)
evaporation
44.

When a liquid is boiling which is false

a)

The surroundings are being cooled

b)

The liquid is a constant temperature

c)

The potential energy of the system is increasing

d)

The kinetic energy of the sytem is increasingf

45.

True or False: Boiling is a process that cools its surroundings

a)

True

b)

False

46.

True or False: Energy is neither added nor removed during a phase change

a)

True

b)

False

47.

True or False: During a phase change of any kind the temperature is constant until the change is complete

a)

True

b)

False

48.

True or False: A boiling substance may feel hot or cold to you depending on the temperature that it boils at

a)

True

b)

False

49.

True or False: If a substance absorbs energy and the energy increases just the KE of the molecules it will get warmer (higher temperature)

a)

True

b)

False

50.

True or False: If a substance absorbs energy and the energy increases just the PE of the molecules it will get warmer (higher temperature)

a)

True

b)

False

51.

A low specific heat means...

a)

It heats up more quickly with added energy than something with a high specific heat

b)

It requires more energy to change temperature than something with a high specific heat

52.

What is happening between D and E?

a)

the KE is increasing

b)

The PE is increasing

c)

The KE is decreasing

d)

The PE is decreasing

e)

The energy is constant in the system

53.

What is happening during section D?

a)

The KE is increasing

b)

The PE is increasing

c)

The KE is decreasing

d)

The PE is decrfeasing

e)

The energy of the system is not changing

54.

A substance's heating curve is shown in the graph. Can you tell its freezing point from this graph?

a)

No, it is impossible

b)

Yes, it is 60o C

c)

Yes, it is 20o C

d)

Yes, it is -60o C

e)

Yes, it is -100o C

55.

At which of the following temperatures will the KE of the molecules be zero?

a)

0oC

b)

0 Kelvin

c)

-273oC

d)

-100oC

56.

Which temperature is the same as 100oC?

a)

373 K

b)

173 K

c)

-173 K

d)

-373 K

57.

Which temperature is the same as 273 K?

a)

273oC

b)

173oC

c)

100oC

d)

0oC

58.

True/False; The Kelvin scale has no negative values

a)

True

b)

False

59.

A temperature of 37oC is closest to the temperature of

a)

this room

b)

your body

c)

outside on a cold day

d)

the sun

60.

A temperature of 4oC is closest to the temperature of

a)

this room

b)

your body

c)

the inside of a refrigerator

d)

the inside of your freezer

61.

A temperature of 22oC is closest to the temperature of

a)

this room

b)

your body

c)

the inside of a refrigerator

d)

the inside of your freezer

62.

If 100 gram of water rises in temperature by 20 degrees Celsius; how many Joules of heat energy were added to it?

a)

Impossible to tell

b)

2,000 J

c)

4,200 J

d)

8,400 J

63.

How many Joules of heat energy are released when 50. grams of water are cooled from 70. to 60. degrees celsius?

a)

impossible to tell

b)

42 J

c)

210 J

d)

2100 J

e)

4200 J

64.

If the temperature of a substance changes by 10 degrees celsius, how by how many degrees Kelvin would it change by?

a)

10

b)

263

c)

273

d)

283

65.

Which sample of water has particles with the highest average KE?

a)

10 mL of water at 25oC

b)

100 mL of water at 35oC

c)

200 mL of water at 35oC

d)

5 mL of water at 65oC

66.

Which temperature is equivalent to 120 K?

a)

-153oC

b)

-120oC

c)

293oC

d)

393oC

67.

In an endothermic reaction the ∆H is

a)

positive

b)

negative

c)

zero

68.

If the ∆H of a reaction is negative, which is true

a)

the products have more energy than the reactants

b)

the reactants have more energy than the products

c)

the products and reactants have the same amount of energy

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