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Year End Review 7th

Total questions: 100

Worksheet time: 1hrs 9mins

Name
Class
Date
1.
Calculate the net force of the object in the image shown.
a)
20N
b)
35N
c)
5N
d)
25N
2.

What is the net force?

a)

3 N

b)

3 N, right

c)

17 N, right

d)

3 N, left

3.
What is the net force?
a)
20 N 
b)
0 N 
c)
400 N 
d)
40 N 
4.

A ____________ is a push or a pull on an object.

a)

friction

b)

force

c)

magnet

d)

gravity

5.
If these teams are pulling with the same amount of force what will happen?
a)
The boy in blue will win.
b)
They will not move at all.
c)
The boy in red will win.
d)
Both will fall down.
6.

Forces that have a net force of zero Newtons

a)

Balanced force

b)

Unbalanced force

7.
The sum of all forces acting on an object.
a)
Contact Force
b)
Balanced Force
c)
Unbalanced Force
d)
Net Force
8.
What will cause an object to move?
a)
Applied forces
b)
Balanced forces
c)
Unbalanced forces
9.
With unbalanced forces, the object will move in the direction of the _______ force.
a)
larger 
b)
smaller 
c)
equal 
10.
A force is a push or pull measured in what units? 
a)
Meters per second, squared
b)
Kilograms 
c)
Newtons 
11.
When the vectors (arrows) point in the same direction what function do you use? 
a)
Dividing 
b)
Multiplying 
c)
Subtracting 
d)
Adding 
12.

When the vectors (arrows) point away what function do you use?

a)

Dividing

b)

Multiplying

c)

Subtracting

d)

Adding

13.
If an object is not moving the forces acting upon it are _____________
a)
unbalanced
b)
weak
c)
balanced
d)
Hulk Smash!
14.

A force can____________.

a)

make an object move

b)

make a moving object stop moving

c)

slow an object down

d)

all of the above

15.

True or false: An object resting on the ground can move without force.

a)

True

b)

False

16.

When you push or pull something, you are creating_________________.

a)

weight

b)

a speed

c)

a force

d)

a surface

17.

Which of the following would it take the most force to move?

a)

a 3-pound ball

b)

a 5 pound ball

c)

a 15 pund ball

d)

a 25 pound ball

18.

Imagine you kick four balls with the same amount of force. Which one will go the farthest?

a)

a 3 pound ball

b)

a 5 pound ball

c)

a 15 pound ball

d)

a 25 pound ball

19.

Which of the following requires forces to move?

a)

a book

b)

a rock

c)

an elephant

d)

all of the above

20.

What does the force of gravity do to objects?

a)

It makes them float

b)

it makes them jump

c)

it pulls them to the center of earth

d)

it pushes them apart

21.

How does gravity on Earth compare to gravity on the moon?

a)

It is the same

b)

There is more gravity on Earth

c)

There is more gravity on the moon

22.

What does the word mass mean?

a)

The amount of matter in an object

b)

the speed an object falls

c)

how high a person can jump

d)

how far an object can be thrown

23.

Objects that have more mass also have more gravity.

a)

True

b)

False

24.

An example of the force of gravity is-

a)

a rocket flying through space

b)

a ball falling to the ground after it has been thrown

c)

a cloud moving across the sky

d)

the Sun rising

25.

The model shows a toy car and the direction it is traveling. Arrow T represents the direction of a force applied to the moving car. After the force (Arrow T) acts on the car, the car MOST likely will NOT-

a)

change direction

b)

go faster

c)

slow down

d)

stop

26.

Fernando was working on an experiment for science class. He dropped 4 steel balls of different weights from the same height. Her noticed that the balls all reached the ground at the same time. Fernando is probably doing an experiment on the-

a)

force of wind

b)

effect of gravity

c)

states of matter

d)

magnetic force

27.

The act of moving is called-

a)

inertia

b)

gravity

c)

work

d)

motion

28.

Henry rolled a car across the floor. He then applied a force to the car. The force was one of the four forces shown by the arrows. Which force will MOST likely increase the car's speed?

a)

Force A

b)

Force B

c)

Force C

d)

Force D

29.

What does the number 3 represent in 4NH3?

a)

Subscript

b)

Superscript

c)

Coefficient

30.

What does the number 4 represent in 4NH3?

a)

Subscript

b)

Superscript

c)

Coefficient

31.

How many Nitrogen (N) atoms are in 4NH3?

a)

4

b)

1

c)

3

d)

12

32.

How many Hydrogen (H) atoms are in 4NH3?

a)

4

b)

1

c)

3

d)

12

33.

How many total molecules is 4NH3?

a)

4

b)

1

c)

3

d)

12

34.

How many total atoms make up 4NH3?

a)

4

b)

16

c)

3

d)

12

35.

In the equation shown, what are the reactant(s)?

a)

N2 + H2

b)

NH3

36.

In the equation shown, what are the product(s)?

a)

N2 + H2

b)

NH3

37.

Is this equation balanced?

a)

Yes

b)

No

38.

Is this equation balanced?

a)

Yes

b)

No

39.

Is this equation balanced?

a)

Yes

b)

No

40.

To balance an equation you should:

a)

ONLY change subscripts.

b)

ONLY change coefficients.

c)

Change BOTH subscripts and coefficients.

41.

Which reactant is missing from the equation shown?

(What should go in the place of the "X"?)

a)

One hydrogen atom.

b)

Three hydrogen atoms.

c)

Four oxygen atoms.

42.

Which of the following is a chemical reaction?

a)

Sodium and chlorine atoms bond to form salt molecules.

b)

Ice melts to form water.

c)

Carbon dioxide freezes to form dry ice.

d)

Salt and water mix to form salt water.

43.

In a chemical equation...

a)

a new substance is formed

b)

new atoms are formed

c)

old atoms disappear

d)

a equal sign is always used

44.

Reactants are

a)

new substances

b)

old substances

c)

likely to disappear

d)

likely to appear

45.

Products are

a)

old substances

b)

new substances

c)

atoms that disappear

d)

atoms that do not exist

46.

When writing a chemical equation, reactants are on the _____________ while products are on the _________________.

a)

top, bottom

b)

right, left

c)

left, right

d)

bottom, top

47.

An arrow in a chemical equation means the reaction is irreversible.

a)

True

b)

False

48.

A worded equation...

a)

are detailed

b)

includes subscripts

c)

includes coefficients

d)

uses the full names of the substances

49.

Worded equations provide the amount of each substance in the reaction

a)

True

b)

False

50.

In 4H²O, the 4 means...

a)

There are four water molecules all together

b)

In every one water molecule, there are four hydrogen atoms

51.

All together there are __________ hydrogen atoms in 4H²O

a)

8 hydrogen atoms

b)

2 hydrogen atoms

c)

4 hydrogen atoms

d)

16 hydrogen atoms

52.

The law of conservation of mass states

a)

chemical reactions create new atoms

b)

atoms cannot be created or destroyed

c)

reactants vanish once a reaction takes place

d)

products appear when a reaction takes place

53.

The amount of atoms on each side of a chemical equation are

a)

different

b)

the same

54.

When balancing an equation...

a)

only the subscripts can be changed

b)

only the arrow can be changed

c)

only the symbols can be changed

d)

only the coefficients can be changed

55.

Is the following equation balanced?

a)

True

b)

False

56.

How many Potassium (K) atom are there?

a)

1

b)

2

c)

3

d)

4

57.

How many Iron (Fe) and Oxygen (O) are there?

a)

Fe = 1, O = 2

b)

Fe = 2, O = 3

c)

Fe = 2, O = 1

d)

Fe = 1, O = 3

58.

How many Hydrogen (H) and how many Chlorine (Cl) are there?

a)

H = 4, Cl = 1

b)

H = 4, Cl = 0

c)

H = 4, Cl = 3

d)

H = 4, Cl = 4

59.

How many molecules are there?

a)

3

b)

6

c)

12

d)

18

60.

Which of the following is true?

a)

H = 6, So = 4

b)

H = 3, So = 4

c)

H = 6, So = 12

d)

H = 6, So = 2

61.
Something that takes up space and has mass.
a)
volume
b)
matter
c)
mass
d)
density
62.
The amount of space something takes up
a)
density
b)
volume
c)
mass
d)
matter
63.
What are the three states of matter?
a)
solid, volume, mass
b)
density, volume, mass
c)
solid, liquid, gas
d)
density, gas, volume
64.
__________ are the building blocks of life.
a)
solids
b)
gases
c)
atoms
d)
nutrients
65.
Gasoline is a ________________.
a)
liquid
b)
solid
c)
gas
66.
Sand is a ___________________.
a)
liquid
b)
solid
c)
gas
67.
Helium is a ____________.
a)
liquid
b)
solid
c)
gas
68.
I am the smallest whole particle of matter. 
a)
atom
b)
compound
c)
molecule
d)
mixture
69.
I am two or more atoms chemically bonded.
a)
atom
b)
compound
c)
molecule
d)
mixture
70.
I am 2 or more elements chemically bonded.
a)
atom
b)
molecule
c)
compound
d)
mixture
71.
Which 2 kinds of particles make up the nucleus of an atom?
a)
electrons and neutrons
b)
electrons and nuclei
c)
protons and neutrons
d)
protons and kryptons
72.
Which particle carries a negative charge?
a)
protons
b)
neutrons
c)
electrons
73.
A pure substance that cannot be broken down into any other substance by chemical or physical means. There are about 100 of us shown in the Periodic Table
a)
compound
b)
mixture
c)
molecule
d)
element
74.
How can you describe this picture?
a)
liquid
b)
solid
c)
gas
75.
What is an example of gas?
a)
crayons
b)
paper
c)
soda
d)
air
76.
Type of matter made of two or more elements...
a)
element
b)
mixture
c)
compound
77.
What kind of charge do protons have?
a)
positive
b)
negative
c)
neutral
78.
Neutrons have a ________ charge.
a)
positive
b)
negative
c)
neutral
79.

What is the definition of matter?

a)

Anything that has mass and takes up space

b)

A substance that is liquid, solid, or gas

c)

Anything that is pure

d)

Anything that you can see or hold

80.

Which of the following is NOT a solution?

a)

Lemonade

b)

Salt water

c)

Soda

d)

Lemon Juice

81.
Which of the following statements describes a liquid?
a)
It has a fixed shape
b)
It takes the shape of it's container
82.
a)

Solid

b)

Liquid

c)

Gas

83.
a)

Solid

b)

Liquid

c)

Gas

84.

Does air have weight?

a)

no

b)

sometimes

c)

yes

d)

of course not

85.

Matter is anything ______________ and _________________.

a)

blue and yellow

b)

metal and rock

c)

living and non-living

d)

solid and gaseous

86.

What state of matter has molecules extremely close together that form a defined shape?

a)

Liquid

b)

Solid

c)

Rock

d)

Gas

87.

When ice cream is left out of a freezer, the ice cream changes from a _______________ to a ___________________.

a)

liquid to a solid

b)

gas to a liquid

c)

liquid to a gas

d)

solid to a liquid

88.
Gasses do not have a shape or volume of their own. You cannot see most gasess.
a)
True
b)
False
89.

Groups run:

a)

up and down

b)

left to right

90.

Periods run:

a)

up and down

b)

left to right

91.

Which two elements share common characteristics based on the periodic table?

a)

Sodium and Magnesium

b)

Chlorine and Sulfur

c)

Argon and Neon

d)

Calcium and Bromine

92.

The vertical (up and down) columns in the Periodic Table are called

a)

groups

b)

towers

c)

periods

d)

atomic numbers

93.
The Modern Periodic Table of Elements is arranged by
a)
atomic mass
b)
atomic number
c)
valence electrons
d)
number of isotopes
94.
Elements in a ..................have similar chemical properties.  
a)
period
b)
group
c)
row
95.

Where do magnets come from?

a)

Magnetite

b)

iron

c)

nickle

d)

cobalt

96.

What is a magnetic feild

a)

area around the north and and south poles.

b)

area around north pole

c)

area around

97.

what happens when to magnets with opposite poles come near each other

a)

they attract

b)

they push away from each other

c)

they dont attract

98.

what happens if you cut a magnet in half

a)

it doesnt break

b)

it becomes 2 magnets and has two north and 2 south poles

c)

it has 3 north and 3 south poles

99.

if 2 magnets with the same poles come close what will they do

a)

repel

b)

attract

c)

come together

100.

where do magnets get there magnitisum from

a)

electrons

b)

newtrons

c)

protons

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