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Unit 3 review (P)

Total questions: 92

Worksheet time: 2hrs 31mins

Name
Class
Date
1.
A measure of the average amount of kinetic energy of the particles in the object.
a)
energy
b)
expansion
c)
temperature
d)
heat
2.
The faster an object moves, the ________ kinetic energy it has. 
a)
more
b)
less
c)
none of the above
d)
all of the above 
3.
Warm air is __________ dense than cold air and rises creating convection currents.
a)
more
b)
less
4.
Thermal energy always moves from ___________ to __________.
a)
Hot to Hot
b)
Cold to hot
c)
Warmer to cooler
d)
Cooler to warmer
5.
The transfer of thermal energy between objects of different temperatures is called...
a)
temperature
b)
heat 
c)
none of these
6.
What is the BEST example of a conductor? 
a)
A wooden block
b)
A ceramic mug
c)
A glass cup
d)
A metal bowl
7.
An insulator . . .
a)
Allows a lot of heat to escape
b)
Makes the temperature of an object rise
c)
Moves heat from one place to another
d)
Traps heat inside an object
8.
When thermal energy is added to a substance, the substance's particles move: 
a)
More rapidly at an increased distance from each other
b)
More rapidly with less distance between each other
c)
More slowly with a greater distance between each other
d)
More slowly with a reduced distance be
9.
The faster molecules move, 
a)
the higher the temperature
b)
the less temperature
c)
the same temperature
d)
I don't know
10.

How does heat transfer when you hold an ice cube in your hand?

a)

from the cold ice cube to your warm hand

b)

the cold ice cube makes your hand cold

c)

from your warm hand to the cold ice cube

d)

very carefully

11.

McDonald's keeps my Big Macs warm under a heat lamp which transfers heat through

a)

conduction

b)

convection

c)

radiation

d)

science stuff

12.

When I drink coffee in the morning, I warm my hands on the mug by what type of heat transfer?

a)

conduction

b)

convection

c)

radiation

d)

coziness

13.

Which type of heat transfer occurs as heat moves in a circular motion in a liquid or gas?

a)

conduction

b)

convection

c)

radiation

d)

cooking

14.

The picture below shows a closed system before and after undergoing a change.


What was changed in the system?

a)

Particles were added to the system.

b)

Water was added to the system.

c)

Heat was added to the system.

d)

Air was added to the system.

15.
Thermal energy stops moving when the objects have the same temperature.
a)
True
b)
False
16.
No more energy can be removed from matter at:
a)
its freezing point
b)
0°C
c)
absolute zero
d)
273 K
17.

When a popsicle melts, the particles in the popsicle _____.

a)

gain thermal energy and speed up

b)

there are no particles in popsicles

c)

lose thermal energy and slow down

d)

stay the same

18.
The lowest possible temperature is___.
a)
0⁰F
b)
0 K
c)
 0⁰C
d)
273 K
19.
In which state do particles move fastest and with little effect on each other?
a)
ice
b)
gas
c)
liquid
d)
solid
20.
What happens to particles of a substance as its temperature increases?
a)
the average kinetic energy increases
b)
the average kinetic energy decreases
c)
the average kinetic energy stays the same
d)
nothing happens
21.

As energy in the form of heat is added to an ice cube, it begins to melt. What causes melting.

a)

Heat causes the molecules to expanded and forces them apart.

b)

Heat removes thermal energy from the ice cube and causes it to become liquid water.

c)

Adding energy causes the bonds between the hydrogen and oxygen in the ice cube to break.

d)

The transfer of thermal energy to the ice cube causes its molecules to move faster.

22.

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

23.
The molecules of a liquid vs. a solid....
a)
Move slower in a liquid.
b)
Move slower in a solid.
24.
The molecules of a gas vs. a solid....
a)
Move faster in a gas.
b)
Move faster in a solid.
25.

Absolute zero

a)

indicates the complete absence of heat/energy

b)

is the coldest possible temperature

c)

is when all molecular motion stops

d)

All of the above

26.
Water freezes at ______ on the Celsius scale?
a)
30
b)
35
c)
5
d)
0
27.
Which of the following terms identifies the change from a liquid to gas?
a)
Vaporization
b)
Condensation
c)
Deposition
d)
Sublimation
28.
Phase change from a solid to a liquid.
a)
melting
b)
sublimation
c)
boiling
d)
condensation
29.
In a solid, the particles
a)
vibrate in place
b)
slide past one another
c)
overcome the strong attraction
d)
move freely in any direction
30.
What section of the phase change graph would you find a solid being heated?
a)
A-B
b)
B-C
c)
C-D
d)
D-E
31.
What section of the phase change graph would you find a gas being heated?
a)
A-B
b)
C-D
c)
D-E
d)
E-F
32.
What section of the phase change graph would you find a liquid being heated?
a)
A-B
b)
B-C
c)
C-D
d)
D-E
33.
According to this graph, what is the melting point temperature of this substance?   (in degrees)
a)
40
b)
70
c)
100
d)
140
34.
According to this graph, what is the boiling point temperature of this substance?   (in degrees)
a)
40
b)
70
c)
100
d)
140
35.
Segment B?
a)
solid
b)
liquid
c)
freezing
d)
melting
36.
Segment E?
a)
gas
b)
liquid
c)
boiling
d)
melting
37.
What is the BEST example of a conductor? 
a)
A wooden block
b)
A ceramic mug
c)
A glass cup
d)
A metal bowl
38.
An insulator . . .
a)
Allows a lot of heat to escape
b)
Makes the temperature of an object rise
c)
Moves heat from one place to another
d)
Traps heat inside an object
39.

Why do all bonds form?

a)

so the number of protons equals the number of electrons

b)

so an atom can become unstable

c)

to fill the outermost energy level

40.
Ionic bonds are between...
a)
Metal and Non-metal
b)
Non-metal and Non-metal
c)
Metal and Metal
41.
How are ionic bonds formed?
a)
Transfer of electrons
b)
Sharing of electrons
42.
Where are the nonmetals located on the periodic table? 
a)
Blue
b)
Red
c)
Green
43.
Where are metals located on the periodic table?
a)
Blue
b)
Green
c)
Red
44.
Is hydrogen considered a metal or a non-metal?
a)
A metal
b)
Nonmetal
c)
Metalloid
45.

Nonmetal elements bonding with metal elementss

a)

Ionic

b)

covalent

46.

Nonmetal elements bonding with other nonmetal elements

a)

covalent

b)

ionic

47.

Electrons are shared in

a)

ionic bonding

b)

covalent bonding

48.

These atoms show electrons being

a)

transferred

b)

shared

c)

traded

49.

A physical change...

a)

changes the physical properties of an object, but does not create a new substance.

b)

creates a new substance and cannot be undone.

50.

A chemical change

a)

changes the physical properties of an object, but does not create a new substance.

b)

creates a new substance and cannot be undone.

51.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

52.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

53.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

54.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

55.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

56.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

57.

Which of the following is ALWAYS produced in a chemical change (but not a physical change?)

a)

a compound

b)

a reversible change

c)

a new substance

d)

an element

58.

Check any answer(s) that are chemical reaction clues.

a)

expected color change

b)

fizzing due to a gas

c)

precipitate formation

d)

temperature increase/decrease

59.

Which of the following clues of a chemical change prove that a chemical reaction is occurring in the image?

a)

temperature change

b)

precipitate formation

c)

unexpected color change

d)

gas production

60.

Which of the following is NOT a chemical change?

a)

oxygen (O) and iron (Fe) produce rust

b)

red Koolaid crystals and water produce a red solution

c)

solid baking soda and liquid vinegar cause fizzing

d)

Na (sodium) + Cl (chloride) --> NaCl (salt)

61.

Which clue of a chemical reaction is shown in the image?

a)

temperature change

b)

precipitate formation

c)

expected color change

d)

light or sound production

62.

Which of these is NOT a common type of chemical change?

a)

oxidation (Statue of Liberty turned green)

b)

flammability (a match burns)

c)

size change (a head is shaved)

d)

reactivity (bleach discolors a towel)

63.

Professor snape creates polyjuice potion. Why is this a chemical reaction?

a)

It is reversible and produced the same substance.

b)

It is irreversible and produced the same substance.

c)

It is reversible and produced a new substance.

d)

It is irreversible and produced a new substance.

64.

Which clues of a chemical reaction do glow sticks display?

a)

temperature change

b)

precipitate formation

c)

light production

d)

gas generation

65.
Magnesium (Mg) and Oxygen (O) form an ________ bond.
a)
Ionic
b)
Covalent
c)
Metallic
d)
Nothing
66.

What kind of bond does NH3 have?

a)

Hydrogen bond

b)

ionic

c)

covalent

d)

metallic bond

67.

Is the following equation balanced?

Al + O2 ---> 2Al2O3

a)

YES

b)

NO

68.

What is the number before a chemical formula called?

Example: 2H2 + O2 ---> 2H2O

a)

Coefficient

b)

Atom

c)

Subscript

d)

Equation

69.

Balance this equation:

H2 + Cl2 ---> HCl

a)

It is balanced.

b)

H2 + Cl2 ---> 2HCl

c)

3H2 + Cl2 ---> 6HCl

d)

H2 + 3Cl2 ---> 6HCl

70.

What is the Law of Conservation of Mass?

a)

It states that matter cannot be created or destroyed.

b)

It states that energy cannot be created or destroyed.

c)

It states that matter can be created or destroyed.

d)

It states that sound can be created or destroyed.

71.
What is the left part of a chemical equation called?
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
72.
What is the right part of a chemical equation called...
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
73.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
74.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4
75.
Which number should go in the blank?
_ H2 + O2 -> 2 H2O
a)
1
b)
2
c)
3
d)
0
76.
Which number should go in the blank?
2 Na+ _ Cl2 -> 2 NaCl
a)
1
b)
2
c)
3
d)
0
77.

Is this endothermic or exothermic?

a)

exothermic

b)

endothermic

78.

When heat is released it is an

a)

exothermic reaction

b)

endothermic reaction

c)

both

d)

none

79.

This is when heat is absorbed, it is an

a)

Exothermic reaction

b)

endothermic reaction

c)

both

d)

none

80.

Fire is an example of

a)

exothermic reaction

b)

endothermic reaction

c)

none

d)

both

81.

Your hands get cold outside from not wearing gloves

a)

exothermic

b)

endothermic

c)

both

d)

none

82.

A melting ice cube is an example of

a)

exothermic

b)

endothermic

c)

none

d)

both

83.

Johnny wants to know how different types of colored light affect plant growth? What is the IV?

a)

types of plant growth

b)

types of colored lights

c)

plant growth on colored lights

d)

plant growth

84.

Johnny wants to know how different types of colored light affect plant growth? What is the DV?

a)

Types of plant growth

b)

types of colored lights

c)

colored lights on plant growth

d)

plant growth

85.

What part of the experiment is:

Johnny sets the lamp to shine for the SAME amount of time each day for 30 days.

a)

problem

b)

control

c)

constant

d)

dependent variable

86.

What is the correct formula to write a hypothesis?

a)

If the IV

then the DV will (take a guess)

b)

If the IV is (pick a level of IV)

then the DV will (take a guess)

c)

If the DV is (increase/decrease)

then the Level of the IV

d)

The IV is (pick a level of IV)

The DV will (take a guess)

87.
Steve wanted to see if the type of fertilizer made sunflowers grow larger. What is the dependent variable 
a)
Type of fertilizer
b)
Size of sunflower
c)
Type of sunflower
88.
Steve wanted to see if the type of fertilizer made sunflowers grow larger. What is the independent variable 
a)
Type of fertilizer
b)
Size of sunflower
c)
type of sun flower
89.
This part of the experiment serves as a basis of comparison; the one variable being tested has been omitted. 
a)
experimental group
b)
control group
c)
data
d)
variables
90.

Match these about variables

a)

1

1.

variables the scientist can change

b)

2

2.

total number of variables

c)

things that stay the same

3.

constants

91.
On a graph, which axis shows the dependent variable?
a)
x-axis
b)
y-axis
c)
neither
d)
it changes
92.

What type of variable is the "Price per Bushel (dollars)" in this graph?

a)

Bar graph

b)

Dependent variable

c)

Independent variable

d)

Controlled variable

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