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8th Grade Diagnostic (Chem to Season+Tides)

Total questions: 121

Worksheet time: 2hrs 38mins

Name
Class
Date
1.
Matter can not be created nor destroyed: it can only be
a)
Destroyed a little bit
b)
Invisible
c)
Transformed, changed
d)
None of the above
2.
The number to the lower side of an element is a 
a)
Subscript
b)
Superscript
c)
Coefficient
d)
Charge
3.
The number in front of a compound or element is a 
a)
Subscript
b)
Coefficient
c)
Superscript
d)
Charge
4.
A chemical reaction is balanced when
a)
both sides have the same elements
b)
Both sides have the same  number of atoms
c)
Same subscripts
d)
Same coefficients
5.
Which of these is not a chemical reaction?
a)
Burning of wood
b)
Milk going bad
c)
Mixing vinegar and baking soda
d)
Melting of ice
6.
The coefficient in  3H2O is
a)
6
b)
2
c)
3
d)
5
7.
A precipitate is a 
a)
liquid that forms when two solids are reacted
b)
a solid that forms when two liquids are mixed
c)
a gas that forms when vinegar and baking soda react
d)
a change of color in a solution
8.
If reaction starts with 20g of reactants it should produce 
a)
a total of 40g of products
b)
a total of 10g of products
c)
a total of 80 g of products
d)
a total of 20g of products
9.
In a reaction A + B ----> C,  reactant A has 5g and product  C has 9g. How many grams does reactant B should have? 
a)
4g
b)
5g
c)
9g
d)
14g
10.
What will weigh more when a chemical change is complete?  The reactants before the chemical reaction, or the product after the reaction is complete?
a)
They both will weigh the same
b)
The product always weighs more than the reactant
c)
The reactant will weigh more than the product
d)
They both will loose mass after the reaction
11.
Measure of the amount of matter 
a)
mass
b)
volume
c)
weight
d)
density
12.
What is the Law of Conservation of mass?
a)
Mass is created in a chemical reaction
b)
Mass is created in a physical change
c)
New chemicals formed from a chemical reaction have a larger overall mass than the original reactants
d)
Mass is never created or destroyed
13.
Since gasses weigh nothing, when they are produced in a reaction they do not have to be accounted for.  
a)
True
b)
False
14.
Which are the reactants in the following reaction?
2Mg + O2 ---> 2MgO 
a)
Mg and O
b)
MgO
c)
Mg and MgO
d)
O and MgO
15.

What has both metal and nonmetal properties?

a)

Electrons

b)

Metalloids

c)

Protons

d)

Metals

16.

The majority of elements on the periodic table are

a)

Nonmetals

b)

Metalloids

c)

Metals

17.

What are good conductors of heat?

a)

Nonmetals

b)

Metalloids

c)

Metals

18.

How many Hydrogen atoms are in 4 H2O? ​ (a)   How many oxygen atoms? ​ (b)  

Choose from the below words
8
4
1
2
3
5
6
7
9
19.

How many Nitrogen atoms are in the in H3C2ON5?

a)

2

b)

3

c)

4

d)

5

20.

How is a chemical change different from a physical change?

a)

there is no difference

b)

a physical change creates a new substance

c)

a chemical change creates a new substance

21.

Is glass breaking a chemical or physical change?

a)
chemical
b)
physical
22.
Is a a rusting bicycle a chemical or physical change?
a)
chemcial
b)
physical
23.
Is melting ice a chemical or physical change?
a)
chemical
b)
physical
24.
Is spoiling food a physical or chemical change?
a)
phyiscal
b)
chemical
25.
Salt dissolves in water
a)
physical Change
b)
chemical change
26.
Which is a chemical change?
a)
freezing fruit juice
b)
slicing a potato
c)
boiling water
d)
copper metal turning green
27.

When mixing milk and vinegar, a white, chunky, solid substance is formed. What has occurred?

a)

Physical change: state of matter

b)

Chemical change: precipitate

c)

Physical change: freezing

d)

Chemical change: new gas

28.

Boiling Water

a)

Physical Change

b)

Chemical Change

29.

A physical change is a change

a)

in an item's properties like its shape, size or density.

b)

that creates a new substance or emits light or heat

c)

that creates a smell

d)

that cannot be undone

30.

Match the following

a)

Physical change

(Shape)

1.

Cutting paper

b)

Physical change

(solubility)

2.

Dissolving

Kool-Aid

c)

Chemical Change

(Flammability)

3.

Lighting a match

d)

Chemical Change

4.

Creating a new substance

e)

Both a Physical & Chemical change

5.

Bubbles

31.
True or False: a physical change may produce a new substance.
a)
True
b)
False
32.

Choose the best description below for the image

a)

physical change

b)

chemical change

33.

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.

34.

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.

35.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

36.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

37.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

38.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

39.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

40.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

41.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

42.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

43.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

44.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

45.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

46.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

47.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

48.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

49.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

50.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

51.

Is this an example of a physical or chemical change?

a)

physical

b)

change

52.
What are the units for measuring density of a solid?
a)
grams
b)
m/s2
c)
g/cm3
d)
newtons
53.
The density of this material is 2 g/cm3.
There are 24 cm3  Find the total mass.
a)
12 grams
b)
48 grams
c)
12 g/cm3
d)
48 g/cm3
54.
Energy can be _____________ or changed from one type to another.
a)
destroyed
b)
transferred
c)
created
d)
ignored
55.

TRUE OR FALSE: Unbalanced forces result in a change of motion.

a)

True

b)

False

56.

What formula can we use to find speed?

a)

Speed = distance/time

b)

Speed = distance X time

c)

Speed = mass X acceleration

d)

Speed = mass/acceleration

57.

What is the speed of a turtle that travels 10 miles in 5 hours?

a)

50 miles/hour

b)

2 miles/hour

c)

5 miles/hour

d)

15 miles/hour

58.

What is the net force acting on the object? (Just write the number)

(a)  

59.

Does the picture show a balanced or unbalanced forced?

a)

Balanced

b)

Unbalanced

60.
a)

Green object is moving at a faster constant speed than Red

b)

Red object is moving at a faster constant speed than Green

c)

Green object is moving at a slower constant speed than Red

d)

Red object is moving 2 times faster than Green

61.
In which time interval was the object speeding up?   
a)
between 0 s and 2 s
b)
between 2 s and 4 s
c)
between 6 s and 8 s
d)
between 8 s and 10 s
62.
What is the person doing from 5 seconds to 10 seconds?
a)
Walking 
b)
Running
c)
Standing Still 
d)
Walking Fast
63.

The geese fly 23 mph to the south when they migrate for the winter.

a)

speed

b)

velocity

c)

acceleration

64.

Changes in our speed, direction or both are called _________.

a)

gravity

b)

changes

c)

acceleration

d)

displacement

65.
When you know both the speed and direction of an object's motion, you know the
a)
average speed of the object
b)
acceleration of the object
c)
distance the object has traveled
d)
velocity of the object
66.
Balanced force
a)
No motion; forces are equal to each other.
b)
Motion; Forces are not equal
c)
Newtons (N)
d)
The resistance to motion of one object moving relative to another; two forces opposing each other.
67.

Match the following vocabulary words to the definitions.

a)

Unbalanced Force

1.

Forces acting on an object that combine and form a net force that is not zero

b)

Balanced Force

2.

Forces acting on an object that combine and form a net force of zero

c)

Newton’s 3rd Law

3.

For every action there is an equal and opposite reaction.

d)

Newton’s 1st Law

4.

An object will not change its motion unless acted upon by an external force.

68.

During which interval is the object speeding up?

a)

A to B

b)

B to C

c)

D to E

d)

E to F

69.
What is happening at E?
a)
Stationary
b)
Accelerating
c)
Fast steady speed; moving away from the starting position
d)
Steady speed; returning to start position
70.

Juan ran 72 m across the football field in 8 seconds. What was his speed?

a)

8 m/s

b)

576 m/s

c)

7 m

d)

9 m/s

71.

Steve runs 20 m North in 4 seconds. What is his velocity

a)

5 m/s

b)

4 m/s south

c)

5 m/s south

d)

5 m/s north

72.

Mr. Rudman drives his race car at a speed of 300 miles per hour. What distance and time could have been used to find his speed?

a)

300 miles in 2 hours

b)

60 miles in 20 hours

c)

30 miles in 20 hours

d)

600 miles in 2 hours

73.

A 20-N net force acts on an object with a mass of 2.0 kg. What is the object's acceleration?

a)

10 m/s2

b)

0.1 m/s2

c)

40 m/s2

d)

22 m/s2

74.

What is the mass of a motorcycle that accelerates at 4 m/s2 when a net force of 400 N is applied to it?

a)

1600 kg

b)

100 kg

c)

0.01 kg

d)

396 kg

75.
What is the equation for Newton's 2nd law?
a)
a = bc
b)
F = m/a
c)
F = ma
d)
a = b/c
76.

The sum of all forces acting on an object is known as…

a)

Applied force

b)

Net force

c)

Normal force

d)

I don't know

77.

Calculate the Net Force

a)

0 N

b)

7 N Right

c)

28 N Right

d)

I don't know

78.

Two students kick a soccer ball at the same time. Student A kicks the ball with a force of 80 N to the right. Student B kicks the ball with a force of 45 N to the left. Calculate the net force.

a)

45 N Right

b)

35 N Right

c)

30 N Right

d)

I don't know

79.

Three dogs are pulling on a stuffed animal. Dog A pulls with a force of 150 N to the north. Dog B pulls with a force of 150 N to the south. Dog C (a much smaller dog) is pulling to the east with a force of 40 N. Which dog will win the toy?

a)

dog A

b)

Dog B

c)

Dog C

d)

I don't know

80.

"For every action, there is an equal and opposite reaction" represents

a)

Newton's 1st law

b)

Newton's 2nd law

c)

Newton's 3rd law

d)

Law of conservation of momentum

81.

Match the following Law of motion with the correct example

a)

Newton's 1st law of motion

1.

Roll a ball across smooth/rough surfaces. The ball rolls faster on smooth because less fiction

b)

Newton's 2nd law of motion

2.

Hit a ball with 2 different forces, the ball will have greater acceleration due to larger force

c)

Newton's 3rd of motion

3.

Bouncing the ball on the court is the action, the floor pushing the ball back up is the reaction

82.

When someone takes an action of pushing off of a wall the reaction is that the person will get a boost to go. Which law does this represent?

a)

Newton's 1st law

b)

Newton's 3rd law

c)

Newton's 2nd law

83.

When one's body moves to the side when a car takes a sharp turn which law is that?

a)

Newton's 3rd law

b)

Newton's 1st law

c)

Newton's 2nd law

84.

Which law does this picture represent?

a)

Newton's 3rd law

b)

Newton's 1st law

c)

Newton's 2nd law

85.
Spinning of the Earth on its axis is called...
a)
rotation
b)
revolution
c)
orbit
d)
double axis
86.
What motion of the Earth takes 365 days?
a)
Rotation
b)
Tilting 
c)
Revolution
d)
Spinning
87.
Rotation of the earth takes
a)
One day
b)
One year
c)
One summer
d)
One winter
88.
The EARTH REVOLVES around the:
a)
Sun
b)
Moon
c)
The Earth doesn't revolve
d)
The sun rotates
89.
What direction does Earth rotate and revolve?
a)
clockwise
b)
counterclockwise
90.
Why is it warmer in the summer?
a)
Closer to the sun
b)
More direct light from Earth's tilt
c)
Stronger light from the sun
d)
Earth spins slower
91.
What are the reasons for the season?
a)
Earth's tilt & rotation
b)
Earth's tilt & revolution
c)
Earth's rotation & rovolution
d)
Earth's tilt & resolution
92.
Why does the area around the equator stay the same temperature all year?
a)
The equator rotates slower than the poles.
b)
The equator remains the same distance from the sun.
c)
The equator always receives direct sunlight.
d)
The equator has 18 hour days.
93.

Which season is taking place in the Northern Hemisphere in Position 1?

a)
Winter
b)
Spring
c)
Summer
d)
Fall
94.

Which season is taking place in the Northern Hemisphere in Position 3?

a)
Winter
b)
Spring
c)
Summer
d)
Fall
95.

Which season is taking place in the Northern Hemisphere in Position 4?

a)
Winter
b)
Spring
c)
Summer
d)
Fall
96.

Tides are caused by...

a)

the rotation of the Earth

b)

the orbit of the Moon

c)

the gravitational pull of the Sun and Moon

d)

wind currents

97.

When do Spring Tides occur?

a)

During the new moon and full moons

b)

During the crescent moons

c)

During the Spring

d)

During the gibbous moons

98.

What do you call small tides where the high tide is not as high as usual and the low tides are not as low as usual?

a)

neap tides

b)

spring tides

c)

orbital eccentricity

d)

orbital declination

99.
Why does the moon's gravitational pull have more of effect on tides than the sun's gravitational pull?
a)
they are the same
b)
the moon is larger than the sun
c)
tides are not caused by the moon
d)
the moon is closer to the Earth than the sun
100.
Space and all the matter and energy in it.
a)
Space
b)
Solar System 
c)
Universe
d)
Sun
101.
A relatively large spherical body that orbits a star.
a)
Star 
b)
Planet
c)
Moon 
102.
A collection of stars, dust, and gas bound together by gravity.
a)
Nebula
b)
Galaxy 
c)
Universe
d)
Protostar
103.
A large celestial body that is composed of gas and that emits light.
a)
star
b)
black hole
c)
element 
d)
big bang
104.
The most commonly accepted theory that explains the beginning of our known universe is the -
a)
Theory of Evolution
b)
Big Bang Theory
c)
Cell Theory
d)
Blackhole theory
105.
In the diagram given, what happens as we move to the left?
a)
Stars get larger
b)
Stars get colder
c)
Stars get hotter
d)
Stars get smaller
106.
Compared to the rest of the stars, our sun is considered...
a)
Extremely Large and Cold
b)
Small with a medium temperature
c)
Medium size with medium temperature
107.
The category that contains the most stars is...
a)
Main Sequence
b)
Supergiants
c)
Giants
108.
Look at the H-R diagram. Which star is
sort of cool, dim (not too much light), and red?
a)
Betelguse
b)
Sirius B
c)
Procyon B
d)
Barnard's star
109.
What is the graph that shows the relations between a star's surface temperature and absolute magnitude?
a)
H-R Diagram
b)
Star Cluster Map
c)
Einstein's Diagram
d)
Newton's Chart of Stars
110.
The Hertzprung Russell Diagram consists of two axis that are labelled...
a)
Luminosity and Size
b)
Luminosity and Temperature
c)
Luminosity and Age
111.

The best description of a super giant star would be -

a)

hot and bright

b)

hot and dim

c)

average brightness and temp

d)

cool and bright

112.
The Milky Way Galaxy is a 
a)
spiral
b)
lenticular
c)
elliptical 
d)
irregular
113.
What type of galaxy is this?
a)
Spiral
b)
Elliptical
c)
Irregular
d)
Irrational
114.
What type of galaxy is this?
a)
Spiral
b)
Elliptical
c)
Irregular
d)
Irrational
115.
What are the the 3 types of galaxies?
a)
Spiral Galaxies, Regular Galaxies, and Lliptical Galaxies
b)
Spiral Galaxies, Irregular Galaxies, and Elliptical Galaxies
c)
 Milky Way, Elliptical Galaxies, and Spiral Galaxies
d)
Milky Way, Elliptical Galaxies, and Irregular Galaxies
116.
The universe is expanding.
a)
True 
b)
False
117.

What type of electromagnetic wave has a higher frequency than visible light and a larger wavelength than x-rays

a)

Infrared

b)

Gamma

c)

visible

d)

Ultraviolet

118.

What type of wave has the largest wavelength and the lowest frequency on the electromagnetic spectrum?

a)

Radio

b)

Micro

c)

Gamma

d)

X ray

119.

Electromagnet waves transfer ____________ without matter.

a)

information

b)

energy

c)

x rays

d)

medium

120.
Which wave in the diagram has the greatest wavelength?
a)
1
b)
2
c)
3
d)
4
121.

Match the following

a)

Radio waves

1.

Has the longest wavelengths and the lowest frequency

b)

Microwaves

2.

Used in cell phone communication and police radar systems

c)

Infrared rays

3.

It is used in thermal imaging

d)

UV rays

4.

Overexposure to this can result in sunburns and skin cancer

e)

Gamma Rays

5.

Has the highest energy of all electromagnetic radiation and is the most damaging to human tissue

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