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Unit 1 Test Bank: Density, Heat, and Energy

Total questions: 130

Worksheet time: 3hrs 59mins

Name
Class
Date
1.
Why do we burn a fuel?
a)
I don't know.
b)
To release energy
c)
To lose energy
d)
To produce carbon dioxide
2.

8.7: Combustion is when a __________ reacts with oxygen

a)

petrol

b)

fuel

c)

fire triangle

d)

carbon dioxide

3.

What are the two PRODUCTS in a complete combustion reaction?

a)

Carbon Dioxide and Water

b)

Carbon Monoxide and Methane

c)

Carbon and Water

d)

Fuel and Oxygen

4.

Which is the correct equation for calculating the calories from burning the cheeto?

a)

q=mcΔtq=mc\Delta t

b)

mq=Δt⋅cal\frac{m}{q}=\Delta t\cdot cal

c)

m⋅c=calgramm\cdot c=\frac{cal}{gram}

d)

m=q⋅cΔtm=q\cdot\frac{c}{\Delta t}

5.

What is NOT product of complete combustion?

a)

carbon dioxide

b)

water

c)

carbon monoxide

d)

water

6.

This type of combustion occurs when there is a limited supply of oxygen

a)

Complete Combustion

b)

Incomplete Combustion

7.

This burning of methane resulted in the formation of soot

a)

methane + carbon monoxide --> oxygen + carbon + water

b)

methane + oxygen --> carbon dioxide + carbon + water

c)

methane + oxygen --> carbon monoxide + carbon + water

8.

Hydrocarbon fuel + oxygen ----> ___+____

(Select 2)

a)

CO2

b)

O2

c)

H2O

d)

CxHy

9.
Write a Balanced Equation for this reaction:
C2H4 + 2 O2 -->
a)
C2O2 + H4
b)
CO2 + HOH
c)
CO + H
d)
2 CO2 + 2H2O
10.
What type of reaction is this?
2 C6H14 + 19 O2 --> 12 CO2 + 14 H2O
a)
Single Replacement
b)
Double Replacement
c)
Combustion
d)
Decomposition
11.

What are the 3 reactants of photosynthesis? The reactants are the things needed for photosynthesis to occur.

a)

oxygen, glucose, sunlight

b)

sunlight, oxygen, water

c)

water, oxygen, carbon dioxide

d)

carbon dioxide, sunlight, water

12.
What are the products of photosynthesis?
a)
water and carbon dioxide
b)
oxygen and glucose
c)
oxygen and carbon dioxide
d)
oxygen and water
13.

Why do we burn a fuel?

a)

To have fun

b)

To release energy

c)

To lose energy

d)

To produce carbon dioxide

14.
What is essential for a combustion reaction to begin?
a)
Carbon dioxide
b)
Fuel 
c)
Fuel, oxygen and heat
d)
Water and oxygen
15.

What does incomplete combustion produce that complete combustion doesn't?

a)

Carbon Monoxide

b)

Water

c)

Heat

d)

Carbon Dioxide

16.

Which diagram shows the MOST dense object?

a)

left

b)

center

c)

right

17.

Which diagram shows the LEAST dense object?

a)

left

b)

center

c)

right

18.

A block of aluminum occupies a volume of 15.0 mL and weighs 45.0 g. What is its density?

a)

3 g/mL

b)

0.3333 g/mL

c)

675 g/mL

d)

I have no idea

19.
What is the formula for density?
a)
density = mass x volume
b)
density = mass / volume
c)
density = mass + volume
d)
density = mass - volume
20.

Why do objects sink or float in H2O?

a)

Because their densities are higher or lower than compared to water

b)

Because their densities are using gravity to pull down

c)

Because their densities are heavier or lighter

d)

Because their mass and volumes are equal

21.
An object with which of the following densities will float on water?
a)
0.7 g/cm3
b)
1.2 g/cm3
c)
3.5 g/cm3
d)
11.4 g/cm3
22.
Calculate the density of the cube. (Hint: calculate the volume of the cube using V= Bh)
a)
0.33 g/cm3
b)
0.4 g/cm3
c)
0.6 g/cm3
d)
0.5 g/cm3
23.
What is the volume of Object X?
a)
10.0 cm3
b)
15.0 cm3
c)
20.0 cm3
d)
25.0 cm3
24.

What is the volume of 150 grams of lead if it has a density of 11.3 g/cm3?

a)

13.3 g

b)

13.3 cm3

c)

.075 g

d)

1695 cm3

25.
Find the volume of this piece of brass.  
a)
50 g
b)
10 cm
c)
6 cm3
d)
12 cm3
26.
An irregularly shaped piece of gold was lowered into a graduated cylinder holding a volume of water equal to 17 ml. The height of the water rose to 20 ml. If the mass of the gold was 27 g, what was its density?
a)
9 g/mL
b)
10.5 g/mL
c)
6.5 g/mL
d)
8 g/mL
27.

Which has the greatest volume?

a)

One on left

b)

One on right

c)

Both the same

d)

Volume cannot be determined

28.

Which are measurable physical properties? (may be more than one)

a)

volume

b)

density

c)

mass

d)

temperature

29.

Ethanol has a density of 0.789 g/cm 3 .

What is the mass of 225 cm 3 of ethanol?

a)

178g

b)

285g

c)

0.004 g

d)

225.789g

30.
Where is the most potiential energy?
a)
Top of the hill
b)
Bottom of the hill
c)
Around a loop
d)
At the end
31.
Where is the most kinetic energy?
a)
Top of the hill
b)
Bottom of the hill
c)
Through the loop
d)
Before the ride even starts
32.
When you rub your hands together friction is transformed into ___________ energy.
a)
electromagnetic
b)
chemical
c)
nuclear
d)
thermal
33.
When you strike a match and light some logs on fire, what is the energy transformation that is taking place?
a)
heat to kinetic to potiential
b)
kinetic to thermal to light
c)
chemical to light to thermal
d)
light to chemical to thermal
34.
How do the particles move in a liquid if thermal energy was added to it?
a)
very slow then stop
b)
kinda fast then slowing down
c)
fast then move faster 
d)
no movement at all
35.
Heat that is transferred from one object to another through direct contact is called
a)
convection
b)
radiation
c)
conduction
d)
thermal
36.
What causes the ice cream to change it's state of matter from a solid to a liquid?
a)
increase in chemical
b)
decrease in chemical 
c)
increase in kinetic
d)
decrease in kinetic
37.
Cooler water sinks and hot water is rising, this is an example of 
a)
conduction
b)
radiation
c)
thermal
d)
convection
38.
When does thermal energy transfer end?
a)
it never ends
b)
both reach the same temperature
c)
when it starts boiling
d)
when you measure them
39.
What is the measure of the average kinetic energy?
a)
electromagnetic
b)
electrical
c)
temperature
d)
kinetic
40.
Any material that does not allow heat to pass through it easily 
a)
Friction
b)
Conductor
c)
Insulator
d)
Magnet
41.
The way in which heat moves through liquids and gases 
a)
convection 
b)
conduction 
c)
conductor
d)
radiator 
42.
Any material that allows heat to move through it easily 
a)
conduction
b)
convection
c)
heat
d)
conductor
43.
The symbol for specific heat is .......
a)
c
b)
Q
c)
m
d)
t
44.
What  is the formula to calculate heat energy required to raise the temperature of any substance?
a)
Q=mc∆t
b)
Q=mc
c)
Q= ½mv
d)
m=QC
45.
A high specific heat means...
a)
It heats up quickly with energy added
b)
It requires more energy to change temperature
46.
Which of the following energy transformations occur when a lamp that is plugged into a wall socket is functioning correctly?
a)
Chemical to light
b)
Electrical to chemical
c)
Electrical to light
d)
Chemical to electrical
47.
Energy transformations occur when...
a)
energy is created through conduction
b)
energy changes from one form to another
c)
two forces slide together that are touching
d)
a chemical reaction takes place
48.
Which of the following shows an energy transformation from chemical energy to electrical to light energy?
a)
A bolt of lightning lights the night sky.
b)
A candle glows brightly in the dark.
c)
A fire in a fireplace lights up a room.
d)
A battery causes a flashlight to shine.
49.
Which of the following shows the correct order of the energy transformations that occur when green plants produce their food from the Sun’s energy?
a)
chemical to thermal
b)
light to chemical
c)
thermal to light
d)
chemical to electrical
50.
Water high in the air falls due to gravity, the moving water spins turbines, and they create/store electricity...
Pick the BEST Energy Conversion below for a Hydroelectric Dam.
a)
Mechanical to Electrical
b)
Electrical to Mechanical to Thermal
c)
Potential to Kinetic to Electrical
d)
Kinetic to Mechanical to Electrical
51.

The Law of Conservation of Energy states that energy is never _____________ or ____________, only transformed.

a)

created, destroyed

b)

created, subtracted

c)

added, subtracted

d)

destroyed, subtracted

52.
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
53.

If the specific heat of water is 4.18 J/g∙°C, how much heat is required to increase the temperature of 1.2 kg of water from 23 °C to 39 °C?

a)

-80,256 J

b)

80.256 J

c)

80,256 J

d)

-80.256 J

54.

For a skillet, used for cooking, do you want a high or low specific heat

a)

High, so that it will need more energy to heat up

b)

Low, so that it will change temperature quickly

55.

What is the specific heat of an unknown substance if 100.0 g of it at 200.0 °C reaches an equilibrium temperature of 27.1 °C when it comes in contact with a calorimeter of water. The water weighs 75. g and had an initial temperature of 20.00 °C? (Specific heat of water is 4.18 J/g°C)

a)

0.111 J/g°C

b)

1.29 J/g°C

c)

0.129 J/g°C

d)

22225.85 J

56.
A sample of iron receives 50.J of heat energy that raises the temperature of the iron by 25.0°C. If iron has a specific heat of 0.10 J/g°C, what is the mass of the iron sample?  (show your work)
a)
25g
b)
30g
c)
20g
d)
50g
57.
A reaction is performed in a beaker with a temperature probe recording the temperature changes of the reaction.  If the temperature began at 15.0 degrees Celsius and ended at 27.5 degrees Celsius. Is the reaction endothermic or exothermic?
a)
Exothermic
b)
Endothermic
58.

Calorimetry Question:

A piece of metal with a mass of 32.8 g is heated to 100.5°C and dropped into 138.2 g of water at 20.0°C. The final temperature of the system is 30.2°C. What is the specific heat capacity of the metal?

a)

2.56 J/g°C

b)

0.391 J/g°C

c)

5.29 J/g°C

d)

3.50 J/g°C

59.
Calorimeters use insulating materials to:
a)
encourage affordable materials in science experiments in schools.
b)
preserve the heat of the environment outside the Styrofoam cup.
c)
prevent heat from escaping to the environment.
d)
keep the liquid inside the Styrofoam cup from overheating.
60.
A metal cube at temperature of 10°C immersed in a liquid at temperature of 70°C.
What is the temperature of the metal cube when thermal equilibrium is achieved between the cube and the liquid?
a)
Between 10°C and 70°C
b)
More than 70°C
c)
Less than 10°C
d)
Same as the room temperature
61.
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
62.
There are 2 pans of water, one has 100 mL in it and one has 1000mL. You add 4000 joules of energy,  which one has the bigger change in temperature?
a)
100 mL
b)
1000 mL
c)
They the same material so they both heat to the same temperature
d)
They both will cool down.
63.

A metal cube at temperature of 70°C is immersed in water at temperature of 20°C. The metal _______ heat while the water __________ heat.

a)

gains, loses

b)

loses, gains

64.

As part of a lab experiment, Tasha drops a metal cube into a beaker of water, as shown in the figure below.


After energy in the form of heat transfers between the substances, what is the final temperature of the water?

a)

The final temperature is 25 °C because there is more water than metal.

b)

The final temperature is 50 °C because the metal warms the water to the temperature of the metal.

c)

The final temperature is between 25 °C and 50 °C because energy is transferred from the metal to the water.

d)

The final temperature is between 25 °C and 50 °C because most of the thermal energy is lost to the air around the substances.

65.

Which description defines heat?

a)

total thermal energy of an object or substance

b)

change in the temperature of a substance in degrees Celsius

c)

energy transferred between objects at different temperatures

d)

average kinetic energy of the particles that make up a substance

66.

At room temperature water is a liquid. How could the water be changed to a solid?

a)

add heat

b)

remove heat

c)

decrease density

d)

increase density

67.

On a hot day the lake water warms and the temperature increases. How does the movement of the particles change?

a)

move slower and farther apart

b)

move slower and closer together

c)

move faster and farther apart

d)

move faster and closer together

68.
When you touch something that feels cold, 
a)
heat from your hand moves into the cold substance.
b)
coldness moves from the cold substance into your hand.
c)
it melts.
d)
it freezes.
69.
The temperature of a substance increases as___.
a)
the substance expands
b)
the average kinetic energy of its particles increases
c)
the substance's volume increases
d)
the substance's mass increases
70.

It is OK to goof off in the lab as long as you have finished your experiment.

a)

true

b)

false

71.

Which of the following should you do in the lab?

a)

wait for instructions

b)

wash your hands when you are done with the experiment

c)

keep your work area clean and organized

d)

All of these

72.

If you get a piece of glassware that is chipped or cracked, what should you do?

a)

throw it in the trash can

b)

let your teacher know

c)

use it anyway

d)

smash it on the floor

73.

Which of these should you do in the lab?

a)

listen to all instructions before starting the lab

b)

let your teacher know if there is a problem

c)

do only the experiment the teacher instructs you to do

d)

all of these

74.

When there is an accident in the lab...

a)

Fix it before anyone sees!

b)

Immediately report it to your teacher.

c)

Run out of the room as fast as possible.

d)

Try to make sure the teacher knows it wasn't your fault.

75.

When it's time to dispose of a chemical, ____________________________

a)

dump it down the drain.

b)

pour it in the garbage.

c)

pour it back into the stock bottle.

d)

ask the teacher before disposing of any chemicals.

76.

Which statement describes a chemical property of iron?

a)

Iron can be flattened.

b)

Iron conducts electricity.

c)

Iron combines with oxygen to form rust.

d)

Iron can be drawn into a wire.

77.

1. A chemical change occurs when a piece of wood

a)

splits.

b)

decays.

c)

is painted

d)

is cut

78.

1. Which of the following processes involves a change in physical properties?

a)

rusting

b)

fermenting

c)

boiling

d)

burning

79.

1. The resistance of a fluid to flow is called

a)

Viscosity

b)

Energy

c)

Density

d)

Pressure

80.

1. If an object is broken in half, it will have

a)

Less density

b)

More volume

c)

More mass

d)

The same density

81.

What describes when a boat floats on water?

a)

Viscosity

b)

Density

c)

Buoyancy

d)

Pressure

82.

1. As the viscosity of a liquid increases, the liquid —

a)

a. evaporates more quickly

b)

a. pours more slowly

c)

a. conducts electricity

d)

a. pours more quickly

83.

What two things are needed to find the density of an object?

a)

Mass and Velocity

b)

Mass and volume

c)

Speed and mass

84.

Is digesting food a

a)

Chemical change

b)

Physical change

c)

Neither

85.

Which is a physical change?

a)

dying your hair

b)

dissolving sugar in water

86.

What is the boiling point of water?

a)

100 o C

b)

O o C

c)

32 o F

d)

0 o F

87.
What is scientific notation?
a)
A long way to write really short  numbers
b)
A short way to write really long numbers
c)
I don't know...
d)
None of the above
88.
When writing a number in scientific notation, the first number must be greater than 1, but less than 10.
a)
False
b)
True
89.
UNDERSTANDING
If the exponent is a positive number...
a)
you will get a large number
b)
you will get a smaller number
90.
UNDERSTANDING
If the exponent is a negative number...
a)
you will get a large number
b)
you will get a small number
91.
When your exponent is negative, you move your decimal....
a)
to the right
b)
to the left
c)
to both sides
d)
nowhere.... the decimal goes nowhere
92.
Write in standard form: 
8 x 104
a)
8,000
b)
80,000
c)
.00008
93.
Which number is correctly written in scientific notation?
a)
5.67 x 105
b)
56.7 x 103
c)
0.567 x 106
94.
How would you write 4.3756 x 104 in standard form?
a)
437,560,000
b)
0.00043756
c)
43,756
d)
4,3756
95.
Which of the following is correct scientific notation?
a)
20.35 x 104
b)
.2035 x 104
c)
2035 4
d)
2.035 x104
96.
The rule of scientific notation is to write all exponents with a base of ____.
a)
50
b)
5
c)
100
d)
10
97.

How many decades are equal to 1.7 x 1025 minutes? Round your final answer to 2 sig figs.

(60 min = 1 hour; 24 hours = 1 day; 7 days = 1 week; 52 weeks = 1 year; 10 years = 1 decade)

a)

3.2 x 1018 decades

b)

3.2 x 1019 decades

c)

1.2 x 1022 decades

d)

2.3 x 1020 decades

98.

On Dr. Davis' bookshelf, there are 23 science textbooks, each with an average of 31 chapters. If each chapter contains 5 pages, how many total pages are there? (Round your answer to 2 sig figs)

a)

3.6 x 104 pages

b)

36 pages

c)

3.6 x 102 pages

d)

3600 pages

99.

A backyard pool is 15.8 feet wide, 19.2 feet long and 5.5 feet deep. What is this pool's volume in cubic meters? [1 meter = 3.28 ft] Round your final answer to 3 sig figs.

a)

1610 m3

b)

47.3 m3

c)

16,600 m3

d)

55.9 m3

100.
For the formula:
 Q= m c ∆T
The  units for specific heat are:
a)
g /J C
b)
°C/g J
c)
kJ/g
d)
J/g°C
101.
The SI unit of heat and energy is the __________.
a)
calorie
b)
heat
c)
joule
d)
watt
102.
A reaction is performed in a beaker with a temperature probe recording the temperature changes of the reaction.  If the temperature began at 15.0 degrees Celsius and ended at 27.5 degrees Celsius. Is the reaction endothermic or exothermic?
a)
Exothermic
b)
Endothermic
103.

What does "q" mean?

a)

A measure of heat energy

b)

A change in heat energy

c)

A measure of kinetic energy

d)

A change in temperature

104.
What is a tool that measures the heat of chemical reactions?
a)
calorimeter
b)
 calorie
c)
Styrofoam™ cup
d)
none of these
105.

What does "ΔT" mean?

a)

A change in health

b)

A change in heat

c)

A change in height

d)

A change in temperature

106.

Ice cream melting is an example of an __________ process.

a)

endothermic

b)

exothermic

107.

Mass must always be in ________ for energy calculations.

a)

kilograms

b)

grams

c)

joules

d)

calories

108.

When heat flows from system to the surroundings that is an example of an ________________ process.

a)

exothermic

b)

endothermic

109.

What device is used to measure the amount of heat involved in a chemical reaction or physical process?

a)

barometer

b)

calorimeter

c)

thermometer

110.

1 food calorie = _______ chemistry calories

a)

1000

b)

1

c)

500

d)

4.184

111.

The specific heat of a substance varies with the mass of a sample. True or False?

a)

True

b)

False

112.

What is the SI unit of heat and energy?

a)

calorie

b)

celsius

c)

joule

113.

If 20g of sugar is stirred into a beaker containing 100g of water. What would the mass of the dissolved solution be after the sugar is dissolved fully?

a)

20g

b)

100g

c)

80g

d)

120g

114.

Suppose you have 15g of baking soda and mix it with 15g of vinegar. When they are combined they bubble and fizz a lot. The final solution has a mass of 25g. What happened to the "lost" 5g?

a)

it dissappears

b)

it is still there just not weighted

c)

it is in the gas that is formed

d)

nothing happened

115.

How many atoms of aluminum are on each side of the following equation?

4Al + 3O2 --> 2Al2 O3

a)

2

b)

6

c)

4

d)

1

116.

Wildfires often start by

a)

lightning

b)

humans

c)

lava

d)

meteors

117.

What are the three components of a wildfire?

a)

carbon dioxide, fuel, water

b)

oxygen, helium, sulfur dioxide

c)

oxygen, fuel and a heat source

d)

ozone, water, and a heat source

118.
What can start a wildfire?
a)
a campfire
b)
lightning 
c)
heat
d)
all of the above
119.
In what part of the United States are wildfires natural?
a)
Northern
b)
Eastern 
c)
Southern 
d)
Western
120.
What kind of wood rarely burns?
a)
Dark wood
b)
Dry wood
c)
Light wood
d)
Wet wood
121.

A wildfire is...

a)

a controlled fire in a forest or woodland

b)

an unplanned or uncontrolled fire in a forest, woodland or other area with vegetation that is easily burned

c)

an uncontrolled fire in a city or other urban area

d)

any fire that burns vegetation in a forest or woodland area

122.

In a wildfire, the greenhouse gas (GHG) _________ is released into the atmosphere and adds to climate change.

a)

carbon dioxide

b)

nitrous oxide

c)

water vapor

d)

fluorinated gases

123.

Which of the following would be the conditions for a LOW fire danger for a particular area?

a)

high temperatures, medium humidity, and wind

b)

cool temperatures, high humidity, and no wind

c)

high temperatures, low humidity, and wind

d)

cool temperatures, no wind, and low humidity

124.

Which of the following would be the conditions for a HIGH fire danger for a particular area?

a)

high temperatures, medium humidity, and wind

b)

cool temperatures, normal humidity, and wind

c)

high temperatures, low humidity, and wind

d)

cool temperatures, no wind, and normal precipitation

125.

Most wildfires are caused by...

a)

human activities.

b)

extreme heat.

c)

lightning strikes.

d)

animals chewing on electrical wires.

126.

(Choose 2) What steps can be taken to reduce the chance of a wildfire when having a campfire?

a)

choose a proper location for the campfire that is away from flammable materials

b)

building a campfire under the canopy of trees

c)

stir, drown and repeat until all coals are extinguished

d)

leave the campfire while the coals are still hot

127.

What would happen if we emit more and more greenhouse gases? (select 2)

a)

less heat will be trapped in the earth

b)

the Arctic ice grows, keeping earth cool

c)

wildfires become more frequent and intense

d)

drought worsens in already dry places

128.

Wildfires can be caused by.....

a)

Accidental human factors only

b)

Deliberate human factors only

c)

Climatic factors only

d)

Both human and climatic factors

129.

Which environmental problem do wildfires significantly contribute to?

a)

the depletion of the ozone layer

b)

eutrophication of water

c)

overpopulation

d)

the greenhouse effect

130.

Why is fighting wildfires dangerous?

a)

Wildfires require a lot of water

b)

Wildfires can change directions quickly

c)

Firefighters have to start fires sometimes

d)

Firefighters do not have proper equipment

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