wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

Science 8 SE Revision 2 S1

Total questions: 160

Worksheet time: 2hrs 12mins

Name
Class
Date
1.

Why does a higher concentration increase the rate of reaction?

a)

it increases the amount of reactants

b)

it lowers the activation energy

c)

it increases the energy of particle collisions

d)

it increases the frequency of particle collisions

2.

Why does a higher temperature increase the rate of a reaction?

a)

it increases both the frequency and energy of particle collisions

b)

it only increases the frequency of particle collisions

c)

it only increases the energy of particle collisions

d)

it reduces the activation energy of the reaction

3.

Grinding a effervescent tablet into powder increases the rate of reaction due to increased

a)

concentration

b)

surface area

c)

temperature

d)

reactants

4.

Increasing the temperature gives particles more __________.

a)

Time

b)

Energy

c)

Space

d)

Frequency

5.

As the frequency of ______________ increases, the rate of reaction increases.

a)

Time

b)

Reactions

c)

Collisions

d)

Reactants

6.

Adding a catalyst ___________ the activation energy.

a)

Raises

b)

Lowers

c)

Doesn't affect

d)

Inreases

7.

The minimum amount of energy needed for colliding particles to react is called

a)

Chemical Energy

b)

Kinetic Energy

c)

Activation Energy

d)

Potential Energy

8.

Substance that changes the rate of a chemical reaction without being consumed in the reaction

a)

bonding

b)

catalyst

c)

chemical reaction

d)

activation energy

9.

Which graph shows the effect of increasing temperature on the rate of reaction of calcium carbonate with dilute hydrochloric acid?

a)
b)
c)
d)
10.

P, Q, R and S are pieces of apparatus.

Which row describes the correct apparatus for the measurement made?

a)

A

b)

B

c)

C

d)

D

11.
The graph shows how the total volume of a gas given off from a reaction changes with time. In which time interval is least gas given off? 
a)
A
b)
B
c)
C
d)
D
12.

Icing sugar has a greater ______ _____ than a solid cube of

sugar.

a)

Surface Area

b)

Catalyst

c)

Temperature

13.
Identify where the reaction has finished
a)
A
b)
B
c)
C
d)
D
14.
Identify the part of the graph with the fastest rate of reaction.
a)
A
b)
B
c)
C
d)
D
15.
How does temperature affect the rate of a chemical reaction?
a)
Temperature has no effect on the rate of reaction
b)
Higher temperature leads to a faster reaction
c)
Temperature affects the pressure of the reaction mixture
d)
Lower temperature leads to a faster reaction
16.
Which of the following is an example of a common biochemical reaction?
a)
Combustion of wood in a fire
b)
Burning of gasoline in a car engine
c)
Rusting of iron
d)
Digestion of food in the stomach
17.
How does particle size affect the rate of a chemical reaction?
a)
Smaller particles react faster than larger particles
b)
Particle size affects the temperature of the reaction
c)
Particle size has no effect on the rate of reaction
d)
Larger particles react faster than smaller particles
18.
What is the definition of a chemical reaction?
a)
A process that changes the physical properties of a substance
b)
A process that changes the temperature of a substance
c)
A process that changes the chemical properties of a substance
d)
A process that changes the state of matter
19.
How does concentration affect the rate of a chemical reaction?
a)
Lower concentration of reactants leads to a faster reaction
b)
Concentration affects the color of the reaction mixture
c)
Concentration has no effect on the rate of reaction
d)
Higher concentration of reactants leads to a faster reaction
20.
How can oxygen gas be produced during a chemical reaction and tested?
a)
By mixing two different acids together
b)
By heating water to its boiling point
c)
By combining hydrogen gas and carbon dioxide gas
d)
By reacting a metal oxide with an acid
21.
What is the role of a catalyst in a chemical reaction?
a)
To lower the activation energy of the reaction
b)
To provide energy for the reaction to occur
c)
To decrease the temperature of the reaction
d)
To increase the concentration of reactants
22.

What are the different methods of making salts?

a)

Neutralization, precipitation, and direct combination

b)

Boiling and evaporation

c)

Sublimation and condensation

d)

Filtration and distillation

23.

Complete the following word equation:

Metal + Acid -->

a)

salt + water

b)

salt + hydrogen

c)

salt + Water + Carbon dioxide

d)

salt + water + hydrogen

24.
Salts that are made with hydrochloric acid are called ______________.
a)
chlorides
b)
sulfates
c)
nitrates
d)
carbonates
25.
Salts that are made with sulfuric acid are called ______________.
a)
chlorides
b)
sulfates
c)
nitrates
d)
carbonates
26.
Salts that are made with nitric acid are called ______________.
a)
chlorides
b)
sulfates
c)
nitrates
d)
carbonates
27.
What salt is produced if you react sodium hydroxide with hydrochloric acid?
a)
sodium hydroxide
b)
sodium sulfate
c)
sodium nitrate
d)
sodium chloride
28.

A salt is formed when nitric acid combines with sodium hydroxide. What is the name of the salt?

a)

sodium chloride

b)

sodium nitrate

c)

hydrogen nitrate

d)

sodium sulfate

29.

Which two chemicals could you react to make only potassium chloride and water?

a)

potassium and hydrochloric acid

b)

potassium hydroxide and hydrochloric acid

c)

potassium oxide and sulfuric acid

d)

potassium and sulfuric acid

30.

How do you remove the water to leave solid copper sulfate crystals?

a)

Filter

b)

Evaporate

c)

Distill

31.

Complete the following word equation:

Metalcarbonate + acid -->

a)

Salt + Hydrogen

b)

Salt + Water + Carbon Dioxide

c)

Salt + Water

32.

What is the test for Carbon Dioxide?

a)

Add Litmus paper

b)

Lime water turning milky

c)

Squeaky pop

33.

Which salt would be formed by reacting cobalt carbonate and hydrochloric acid?

a)

Cobalt sulfate

b)

Cobalt chloride

c)

Cobalt hydroxide

d)

Cobalt sulfide

34.

How do you separate an excess insoluble reactant from a solution?

a)

Filtration

b)

Precipitation

c)

Crystalisation

d)

Evaporation

35.

Which two chemicals could you react to make only potassium chloride and water?

a)

Potassium and hydrochloric acid

b)

Potassium hydroxide and hydrochloric acid

c)

Potassium oxide and sulfuric acid

d)

Potassium and sulfuric acid

36.

When producing a soluble salt in a reaction between an acid and an alkali, how can you prepare dry solid crystals from the solution?

a)

Filtration

b)

Neutralisation

c)

Condensation

d)

Evaporation/crystallisation

37.

_________________ + nitric acid --> calcium nitrate + water

a)

calcium sulfate

b)

calcium oxide

c)

calcium carbonate

d)

calcium

38.

There is always more ____ than _____.

a)

solute, solvent

b)

solvent, solute

c)

solvent, solution

d)

solute, solution

39.
The _____is the part that gets dissolved. 
a)
solute 
b)
solvent 
c)
solution 
40.
The universal solvent is ______. 
a)
sodium 
b)
acid 
c)
water 
d)
wind 
41.
When one of the parts of the solution is water we call it _________. 
a)
water stuff 
b)
water mixture 
c)
aqua-man
d)
aqueous 
42.

This is the part of the solution that causes the dissolving to occur.

a)

solute

b)

solvent

c)

salt water

43.
If we are making Kool-aid with sugar, Kool-aid powder, and water, which part is the solvent?
a)
water
b)
powder
c)
sugar
d)
powder and sugar
44.

You can make a solution more concentrated by adding more __________.

a)
solute
b)
solvent
c)
water
d)

solution

45.

Aria is making lemonade. She adds sugar to the water. The sugar is a

a)

solute

b)

solution

c)

science

46.
Solutions are composed of __________ .
a)
salts and solutes
b)
solvents and salts
c)
solutes and alloys
d)
solutes and solvents
47.
a)

solvent

b)

solution

c)

solute

48.
a)

solvent

b)

solute

49.
a)

solute

b)

solvent

50.
a)

solvent

b)

solute

51.
a)

solvent

b)

solute

52.

Match the description to the correct term.

a)

particles that are being dissolved

1.

Solute

b)

homogeneous mixture containing water

2.

Aqueous Solution

c)

dissolving medium

3.

Solvent

53.

What is the unit to MEASURE force?

a)

Kilogram

b)

Meter

c)

Pounds

d)

Newton

54.

In an endothermic reaction, heat is ...

a)

taken in

b)

given out

55.
In an exothermic reaction, heat is ...
a)
taken in
b)
given out
56.

6. Which of these processes is always exothermic?

a)

A. evaporation

b)

B. burning

c)

C. insulation

d)

D. melting

57.
If a chemical reaction is EXOTHERMIC, the temperature would....
a)
Stay the same
b)
Increase
c)
Decrease
58.
During an endothermic reaction in a beaker if we are part of the surroundings and touched the beaker, it would feel _______. 
a)
Warm
b)
Cold
59.
Baking bread and cooking an egg are examples of....?
a)
Endothermic processes
b)
Exothermic processess
c)
None of these 
60.
What type of reaction is shown in the photo?
a)
Exothermic
b)
Isothermic
c)
Endothermic
d)
None of the  above
61.

Is photosynthesis an Exothermic or an Endothermic reaction?

a)
Endothermic
b)
Exothermic
62.

What type of reaction occurs in a hand warmer?

a)

exothermic

b)

endothermic

63.

5. When ammonium chloride dissolves in water the temperature falls. The type of energy change is described as?

a)

A. exothermic    

b)

 B. activated  

c)

C. decomposition            

d)

D. endothermic

64.

O2(g) + 2 H2 (g) → 2 H2O (g) + EnergyO_2\left(g\right)\ +\ 2\ H_2\ \left(g\right)\ \rightarrow\ 2\ H_2O\ \left(g\right)\ +\ Energy  

a)

endothermic

b)

exothermic

65.

6 CO2+ 6 H2O + Energy → C6H12O6 + 6 O26\ CO_2+\ 6\ H_2O\ +\ Energy\ \rightarrow\ C_6H_{12}O_6\ +\ 6\ O_2

a)

endothermic reaction

b)

exothermic reaction

66.

A student mixed two chemicals to allow them to react. The temperature before the reaction was 25 ° C. The temperature after the reaction was 18° C. Which of the following is true?

a)

It is an exothermic reaction

b)

It is an endothermic reaction

67.

Fire is an example of

a)

exothermic reaction

b)

endothermic reaction

c)

none

d)

both

68.

Fireworks are an example of

a)

exothermic

b)

endothermic

c)

both

d)

none

69.

A melting ice cube is an example of

a)

exothermic

b)

endothermic

c)

none

d)

both

70.

Energy is released during the process of cellular respiration. This is an example of an ___________ reaction.

a)

endothermic

b)

exothermic

71.

During evaporation, water absorbs heat so that bonds can break and water vapor forms. This is an example of an _____________ reaction.

a)

endothermic

b)

exothermic

72.

What type of wave are sound wave?

a)

longitudinal

b)

transverse

c)

electromagnetic

d)

sea wave

73.

In which medium sound can't travel?

a)

solid

b)

liquid

c)

gas

d)

vacuum

74.

What is an echo

a)

deflected sound

b)

refracted sound

c)

reflected sound

d)

diffracted sound

75.

In which medium speed of sound are fastest?

a)

vacuum

b)

solid

c)

liquid

d)

gas

76.

What is the range of frequencies audible to the human ear

a)

lower than 20 Hz

b)

20 Hz - 20.000 Hz

c)

higher than 20.000 Hz

d)

0 Hz - infinite Hz

77.

What is ultrasound?

a)

Sound with a frequency higher than 20.000 Hz

b)

Sound with a frequency lower than 20 Hz

c)

Sound with a frequency 20 Hz

d)

sound with a frequency 20.000 Hz

78.

look at the picture. There are 4 sound wave with different amplitude and wavelength. Which sound wave has loudest sound?

a)

A

b)

B

c)

C

d)

D

79.

look at the picture. There are 4 sound wave with different amplitude and wavelength. Which sound wave has highest pitch?

a)

A

b)

B

c)

C

d)

D

80.

The delay time between light of thunder and sound of thunder is 2 seconds. If the speed of sound at the air is 340 m/s, how far the thunder from you?

a)

680 m

b)

170 m

c)

342 m

d)

338 m

81.

What is the approximate speed of sound in air?

a)

330 m/s

b)

1500 m/s

c)

5000 m/s

82.

Which of the following best describes a sound wave with high amplitude?

a)

The sound wave is loud

b)

The sound wave is high pitched

c)

The sound wave is above the cloud

83.

What is the name for an area of low pressure in a longitudinal wave?

a)

compression

b)

rarefaction

c)

equilibrium

84.

What does the area pointed by the arrow in the diagram represent?

a)

compression

b)

rarefaction

c)

equilibrium

85.

Match these

a)

sound

1.

mechanical energy

b)

light

2.

radiant energy

c)

travels in waves

3.

both

86.

__________ means to move back and forth quickly.

a)

Pitch

b)

Amp (Amplitude)

c)

Vibrate (vibration)

d)

Echo

87.
Question Image

Match these parts of a sound wave

a)

Amplitude

1.

volume

b)

Frequency

2.

pitch

c)

Compression

3.

wave close together

d)

rarefaction

4.

wave spread out

88.

Match these

a)

sound

1.

longitudinal wave

b)

light

2.

transverse wave

c)

energy

3.

the ability to do work

89.
Question Image

Match these parts of a light wave

a)

Amplitude

1.

height of the wave

b)

wavelength

2.

distance from wave to wave; gives light its color

c)

crest

3.

top

d)

trough

4.

bottom

e)

frequency

5.

how often waves occur

90.

Order these colors from least energy to most energy

a)

red

b)

orange

c)

green

d)

blue

e)

purple (violet)

1)
2)
3)
4)
5)
91.

match

a)

vibration

1.

move back and forth

b)

echo

2.

sound bounces back

c)

reflection

3.

light bounces back

d)

refraction

4.

light bends

92.

We measure pitch in....

a)

Volume

b)

Decibles

c)

Amplitude

d)

Hertz

93.

Which sound wave has the lowest pitch?

a)
b)
c)
94.

The part of the sound wave when particles are furthest apart

a)

compression

b)

rarefaction

95.

pitch=

a)

amplitude

b)

frequency

96.
Question Image

Match these wave parts

a)

Crest

1.

top

b)

Trough

2.

bottom

c)

Wavelength

3.

distance between waves

d)

Amplitude

4.

height of wave

e)

frequency

5.

how often a wave occurs

97.

Sound moves in ... directions.

a)

one

b)

two

c)

all

d)

three

98.

... is the highness or lowness of a sound.

a)

volume

b)

tension

c)

pitch

d)

none of the above

99.

... is an organized pattern of sound.

a)

rhythm

b)

pitch

c)

noise

d)

none of the above

100.

The speed of the vibration is called ...

a)

pitch

b)

rhythm

c)

frequency

d)

none of the above

101.

The amount of force placed on an object that affects how tight or lose it is, called as ...

a)

tension

b)

energy

c)

speed

d)

none of the above

102.

The loudness or softness of a sound is ...

a)

pitch

b)

sound

c)

volume

d)

none of the above

103.

A measure of how loud or soft a sound and is measured in units known as decibels.

a)

echo

b)

pitch

c)

amplitude

d)

volume

104.

Astronomers can see the explosion of a star in space but they cannot hear the sound of the explosion. What is the reason?

a)

light travels faster than sound

b)

light is a form of energy but sound is not

c)

light can travel through space but sound cannot

d)

light is not reflected by the Earth's atmosphere but sound is

105.

When a key on a piano is pressed, a sound is heard. What produces this sound?

a)

the vibrating key of the piano

b)

the vibrating string of the piano

c)

the finger pressing the piano key

d)

the air molecules inside the piano

106.

Which of these sounds has a sound wave with the largest amplitude?

a)

a whisper

b)

a murmur

c)

a clap

d)

a lion's roar

107.
If distance C on the diagram increased, what would happen to the pitch? 
a)
The pitch would be louder. 
b)
The pitch would be softer. 
c)
The pitch would be higher. 
d)
The pitch would be lower. 
108.
If the distance represented by the letter A were increased, how would it change the way the sound was heard?
a)
The sound would be higher. 
b)
The sound would be lower. 
c)
The sound would be softer. 
d)
The sound would be louder. 
109.
A reflected sound wave is know as a/an ___________.
a)
frequency
b)
pitch
c)
echo
d)
rarefaction
110.
When an ambulance move TOWARD you it sounds ________ pitched. 
a)
high
b)
low
c)
medium
111.
When the car moves AWAY from you, its horn seems...
a)
Low pitched
b)
High pitched
c)
Normal
112.
When does sound refract?
a)
When it travels in a vacuum.
b)
When it moves through cold air.
c)
When it travels in only one medium.
d)
When it moves from one medium to another.
113.

Which of the following is the best example of an electrical conductor?

a)

tire

b)

steel

c)

plastic

d)

none of the above

114.

Which best briefly summarizes the law of electric charges?

a)

charges always attract

b)

charges always repel

c)

unlike charges attract

d)

unlike charges repel

115.

Which of the following statements is correct about conductor and insulator?

a)

the electrons in conductor do not move around

b)

the electrons in insulator do not move around

c)

the electric current can pass through the insulator

d)

the electric current can pass through both insulator and conductor

116.

Electric circuit is a path for transmitting electric current

a)

true

b)

false

117.

What is the main difference between parallel and series circuits?

a)

in series circuit, charges flow one path; charges in parallel circuit flow in multiple paths

b)

in series circuit, charges flow multiple paths; charges in parallel circuit flow in one path

c)

in parallel circuit, several lamps work separately; in series circuit, several lamps work independently

d)

in parallel circuit, if one lamp breaks then the other lamps will also off; in series circuit, if one lamp breaks then the other lamps still works

118.

What kind of circuit is this?

a)

series

b)

parallel

119.

If a substance has a higher number of electrons than protons on its surface, what type of charge does it have?

a)

neutral charged

b)

positively charged

c)

negatively charged

d)

no charges at all

120.

A ______ opens and closes a circuit.

a)

cell

b)

conductor

c)

wire

d)

switch

121.

What is this symbol for?

a)

light bulb

b)

wire

c)

cell

d)

battery

122.

When you remove a bulb from a three bulb circuit, and the other two bulbs go off, then the bulbs must have been connected in parallel.

a)

true

b)

false

123.

Electric current is the flow of _________.

a)

protons

b)

electrons

c)

neutrons

d)

none of them

124.

Electric current is measured in....

a)

watts

b)

joules

c)

newtons

d)

amperes

125.

When one light bulb burns out, the rest stay lit. The bulbs must be found in ....

a)

series circuit

b)

parallel circuit

126.

Carbon is The only non-metal material that can conduct electricity.

a)

true

b)

false

127.

What kind of circuit is this?

a)

series

b)

parallel

128.

Are the currents at A1 and A2 same?

a)

Yes, they are same

b)

No, they are different

129.

electric fires are put off by .........................

a)

sand

b)

water

130.

one of the dangers of electricity which damage the tissues of human body is ...................

a)

electric fire

b)

electric burns

c)

electric shock

131.

all the following are from the electric conductors except .......................

a)

human body

b)

rubber

c)

iron

d)

copper

132.

What is electricity?

a)

an object that electrons do not flow through

b)

energy created by moving charged particles

c)

when two objects repel each other

d)

a circuit that has only one path for electricity to flow

133.

Which of the following represents the rate of the flow of electricity, expressed in unit of amps?

a)

current

b)

circuit

c)

voltage

d)

resistance

134.

Which of the following represents the opposition presented to the current by a material or device, measured in ohms?

a)

current

b)

resistance

c)

voltage

d)

electricity

135.

Which of the following represents the potential difference between two points, measured in volts?

a)

voltage

b)

current

c)

electricity

d)

resistance

136.

In the model, what do the arrows represent?

a)

The flow of current

b)

The flow of resistance

c)

The flow of voltage

d)

The flow of positrons

137.

In the model, what does the lightbulb represent?

a)

electricity

b)

current

c)

voltage

d)

resistance

138.

In the model, what does the battery represent?

a)

voltage

b)

current

c)

circuit

d)

resistance

139.

Based on this model, what change should be made in order to increase the current?

a)

Close the switch

b)

Add another battery

c)

Add another lamp

d)

Remove a wire

140.

What is the formula for voltage?

a)

V = (I x R) / 2

b)

V = I / R

c)

V = R / I

d)

V = I x R

141.

What is the formula for current?

a)

I = V / R

b)

I = R / V

c)

I = V x R

d)

I = (V x R) / 2

142.

What is the formula for resistance?

a)

R = I / V

b)

R = V / I

c)

R = V x I

d)

R = (V x I) / 2

143.

If a charger for a tablet offers a voltage of 120V and has 240Ω of resistance, what is the amperage?

a)

0.5A

b)

2A

c)

14,400A

d)

28,800A

144.

If an electric ceramic brush has a current of 0.3 amps and a voltage of 120 volts, what is the resistance?

a)

18Ω

b)

36Ω

c)

200Ω

d)

400Ω

145.

If a computer has 10.0A of current and 11Ω of resistance, what is its voltage?

a)

0.9V

b)

1.1V

c)

55V

d)

110V

146.

Based on the model, which of the following would be true regarding the relationship between voltage, current, and resistance?

a)

Current will reduce voltage.

b)

Current will not pass through resistance.

c)

Resistance will reduce current.

d)

Voltage will reduce resistance.

147.

Based on the graph, which of the following would be true regarding the relationship of voltage and current?

a)

As voltage increases, current decreases.

b)

Voltage will not affect current.

c)

As voltage decreases, current increases.

d)

As voltage increases, current also increases.

148.

A light bulb has a resistance of 7Ω with a potential difference of 21V across it. What is the current flowing through the light bulb?

a)

147 A

b)

28 A

c)

3A

d)

30A

149.

What is the total resistance in this series circuit?

a)

10 Ohms

b)

25 Volts

c)

30 Volts

d)

30 Ohms

150.

The symbol for current is _____ and the unit is _______.

a)

C, Amps

b)

I, Volts

c)

C, Ohms

d)

I, Amps

151.

The symbol for resistance is ...

a)

Ω\Omega  

b)

θ\theta  

c)

A

d)

V

152.

Density is _____________.

a)

Mass/Volume

b)

Weight/Volume

c)

Mass/Weight

d)

Volume/Mass

e)

Volume/Weight

153.
Put the liquids in order from most dense to least dense?
a)
4, 3, 2, 1
b)
1, 2, 3, 4
c)
3, 4, 2, 1, 
d)
4, 3, 1, 2
154.
Frank has an eraser. It has a mass of 4g, and a volume of 2cm3. What is its density?
a)
8 g/cm3
b)
2 g/cm3
c)
1/2 g/cm3
d)
24 g/cm3
155.
Find the volume of this piece of brass.  
a)
50 g
b)
10 cm
c)
6 cm3
d)
12 cm3
156.
Which box has a higher density?  
a)
Box A
b)
Box B
c)
cannot be determined
d)
they are the same
157.
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
158.

Which has the greatest volume?

a)

One on left

b)

One on right

c)

Both the same

d)

Volume cannot be determined

159.

Which has the greatest density?

a)

A

b)

B

c)

C

d)

All the same density

160.

Ethanol has a density of 0.789 g/cm 3 .

What is the mass of 225 cm3 of ethanol?

a)

178g

b)

285g

c)

0.004 g

d)

225.789g

Similar Resources on Wayground

Quiz #13 - Light

159 questions

Quiz #13 - Light

quiz

Worksheet

•

6th - 8th Grade

UE4 Review

162 questions

UE4 Review

quiz

Worksheet

•

6th - 8th Grade

PSSA Science 8

161 questions

PSSA Science 8

quiz

Worksheet

•

8th Grade

Super Science Quiz of Awesomeness!!

158 questions

Super Science Quiz of Awesomeness!!

quiz

Worksheet

•

6th - 8th Grade

ULTIMATE Science

158 questions

ULTIMATE Science

quiz

Worksheet

•

6th - 8th Grade

Enviro A Final Exam Review

158 questions

Enviro A Final Exam Review

quiz

Worksheet

•

7th - 12th Grade

Energy transformations and thermal energy

159 questions

Energy transformations and thermal energy

quiz

Worksheet

•

8th - 9th Grade

Physical Science Content Vocabulary

157 questions

Physical Science Content Vocabulary

quiz

Worksheet

•

8th Grade