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Year 8 Quiz

Total questions: 87

Worksheet time: 5hrs 7mins

Name
Class
Date
1.

Example of transparent object

a)

wood

b)

tissue paper

c)

clear water

2.

when the distance of the screen from the pinhole is increased, the size of the image __________

a)

increases

b)

decreases

c)

no change

3.

Image formed by a pin hole camera is

a)

real

b)

virtual

c)

inverted

d)

smaller in size

4.
The illustration shows a light ray striking an object.
In the illustration, the light ray striking the object is-
a)
absorbed
b)
stopped
c)
reflected
d)
refracted
5.
A student placed a pencil in a cup of water.  The pencil appears broken because light-
a)
always travels in a straight line
b)
bends when it passes through water
c)
makes the water in the glass evaporate
d)
reflects the pencil on the water's surface
6.
The bouncing off of light rays from the surface of an object such as a mirror or other shiny surface is called:
a)
mirror
b)
laser
c)
reflection
d)
refraction
7.
a)
Reflection
b)
Refraction
8.

What happens when a beam of light hits a solid object?

a)

The light passes through it

b)

All the light is absorbed

c)

A shadow forms

d)

All the light is reflected

9.

Which image CORRECTLY shows how light behaves when it travels from air through glass?

a)
b)
c)
d)
10.

Eyeglasses bend light to help the image form properly on the retina. The bending of light as it passes from one medium to another is called

a)

diffraction

b)

interference

c)

reflection

d)

refraction

11.
What part of the eye controls how much light enters the black hole (pupil) in the center of the eye?
a)
optic nerve
b)
pupil
c)
cornea
d)
iris
12.
The two parts of the eye that refract light are the ______________.
a)
eyelid and eyebrow
b)
eyelid and lens
c)
cornea and retina
d)
cornea and lens
13.
A person who is farsighted can be assisted by_________________.
a)
lenses that are tinted lenses
b)
concave lenses that make light rays focus on the cornea
c)
convex lenses that make light rays converge farther toward the retina
d)
surgery that enlarges the pupil
14.
What part of the eye acts like a convex lens?
a)
pupil
b)
retina
c)
cornea
d)
eyelid
15.
What is the order of the path of light in the human eye?
a)
cornea, pupil, lens, retina, optic nerve, brain
b)
 lens,cornea, pupil, retina, optic nerve, brain
c)
pupil, lens, retina, optic nerve, cornea, brain
d)
brain, pupil, lens, retina, optic nerve, cornea,
16.

What type of lens is wider in the middle than on the edges?

a)

Concave

b)

Convex

c)

Objective

d)

Ocular

17.

The point at which light rays converge after passing through a convex lens is called __________.

a)

The Horizon Point

b)

The Point Break

c)

The Focal Point

d)

The Perspective

18.
Mass is _________________________.
a)
the amount of matter in an object.
b)
the force of gravity on an object.
c)
both.
d)
neither.
19.
Weight is ________________________.
a)
the force of gravity on an object.
b)
the amount of matter in an object.
c)
neither.
d)
both.
20.
In physics, weight is measured in _____.
a)
grams
b)
newtons
c)
kilograms
d)
pounds
21.
In physics, the weight equation is _____________.
a)
Weight=Mass×Gravity
b)
Mass=Weight×Gravity
c)
Gravity=Mass×Weight
22.
You get in your spaceship and head on a trip to Mars.  As you leave Earth, your mass ______________.
a)
increases
b)
decreases
c)
remains the same
23.
An object weighs 340 N.  What is its mass?
a)
340 kg
b)
340 N
c)
34 kg
d)
34 N
24.
On which planet would your mass be the greatest?
a)
Earth
b)
Jupiter
c)
Sun
d)
Your mass doesn't change on different planets.
25.

On Earth the __________ field strength is 10 N/kg.

a)

kinetic

b)

magnetic

c)

gravitational

d)

elastic

26.

Look at the image. What does 'W' stand for and how is it measured?

a)

Weight and in Newtons per Kg (N/Kg)

b)

Weight and in Kilograms (Kg)

c)

Weight and in Newtons (N)

27.

Look at the image. What does 'g' stand for and how is it measured?

a)

Gravitational field strength and in Newtons per Kg (N/Kg)

b)

Gravitational field strength and in Kilograms (Kg)

c)

Gravitational field strength and in Newtons (N)

28.

Look at the image. Which equation would I use to calculate Weight?

a)

W = g / m

b)

W = m x g

c)

W = m / g

29.

A cat on Earth has a mass of 2 kg. What is it's weight?

a)

2N

b)

20kg

c)

2kg

d)

20N

30.

A toolbox on Earth has a weight of 300N.

Calculate the mass.

a)

3000kg

b)

30kg

c)

30g

d)

30N

31.
If extension = Stretched length - original length. What is the extension of spring D.
a)
1mm
b)
2mm
c)
3mm
d)
0mm
32.

Forces can ...

a)

Stretch

b)

Compress

c)

Deform

d)

Smell

33.

The amount a spring or bungee cord can stretch is called

a)

push

b)

squash

c)

extension

d)

contact

34.
Stretching is another term for tension.  
a)
True
b)
False
35.
What is compression?
a)
a twisting or turning force
b)
a force that makes a straight material become curved
c)
a pulling force that stretches a material
d)
a pushing force that squeezes a material 
36.

Which of the following are contact forces?

a)

Magnetic force

b)

Friction

c)

Electrostatic force

d)

Air resistance

37.

How can a force deform an object?

a)

compress

b)

stretch

c)

tension

d)

extension

38.

weight (N) =

a)

mass (kg) / gravitational field strength (N/kg)

b)

mass (kg) x gravitational field strength (N/kg)

c)

gravitational field strength (N/kg) / mass (kg)

d)

gravitational field strength (N/kg) x mass (kg)

39.

Who said "For every action there is an equal and opposite reaction"

a)

Isaac Newton

b)

Robert Hooke

c)

Carl Linnaeus

d)

Gregor Mendel

40.
What are the 3 major types of rocks?
a)
Igneous, Metamorphic, Sedimentary
b)
Metamorphic, Igneous, Cementation
c)
magma, lava, crystals
41.
What is the MAIN way rocks are classified?
a)
Their color and shapes
b)
How they form
c)
Mineral bands
d)
Where they form
42.
The process by which metamorphic rocks are formed...
a)
heat and pressure
b)
erosion and deposition
c)
melting and cooling
43.
The process by which igneous rocks are formed...
a)
heat and pressure
b)
melting and cooling
c)
erosion and deposition
44.
Rock that forms sediment from older rocks get pressed and cemented together.
a)
Sedimentary Rock
b)
Metamorphic Rock
c)
Igneous Rock
45.
This rock was another type of rock that was heated and compressed over time. What type of rock is this?
a)
Sedimentary
b)
Igneous
c)
Metamorphic
46.
This rock started as molten magma. What type of rock is this?
a)
Sedimentary
b)
Igneous
c)
Metamorphic
47.

In the Earth's mantle, heat is transferred in large convection currents. Within these currents;

a)

cooler and hotter rock rise but do not sink

b)

hotter rock rises and hotter rock sinks

c)

hotter rock rises and cooler rock sinks

d)

hotter and cooler rock sink but do not rise

48.

Which of the following lists Earth's compositional layers starting with Earth's center and ending with the outermost layer.

a)

mantle, crust, core

b)

crust, mantle, core

c)

crust, core, mantle

d)

core, mantle, crust.

49.
Which compositional layer is made of iron and some nickel?
a)
crust
b)
mantle
c)
core
50.
Which physical layer is the thinnest?
a)
crust
b)
mantle
c)
core
51.
Which layer of the core is solid?
a)
inner
b)
outer
52.
What are the two types of crust?
a)
top crust,bottom crust
b)
oceanic crust, continental crust
c)
water,land
d)
none of the above 
53.

The surface of Earth is about ________ water and _____ land

a)

90%/10%

b)

50%/50%

c)

75%/25%

d)

water does not exist on Earth

54.
Why have geologists not reached the mantle?
a)
It is too hot for humans to go there.
b)
It is too smelly for humans to go there.
c)
It doesn't have Wi-Fi so none of their instruments work.
d)
Scientists have not figured out how to time travel.
55.

Iron + copper oxide =

a)

Iron + copper oxide

b)

Iron oxide + copper oxide

c)

Iron oxide + copper

d)

Magic

56.

Which of the following is more reactive?

a)

Calcium

b)

Magnesium

c)

Zinc

d)

Magnesium

57.
a substance that is formed as the result of a chemical reaction
a)
Product 
b)
Reactant
c)
Starters
d)
Enders
58.
A displacement reaction will occur when...
a)
a more reactive metal displaces a less reactive metal from its compound.
b)
A less reactive metal displaces a more reactive metal from its compound
c)
Displacement only occurs when two of the same metals are reacted 
d)
Displacement reactions will only occur in metals above iron in the reactivity series
59.

True or false? Chemical reactions are easily reversible

a)

True

b)

False

60.

In a word equation, the starting chemicals are called...

a)

reactants

b)

products

c)

ingredients

61.

Sometimes, compounds can be broken down into simpler substances. What type of reaction is this?

a)

combustion

b)

oxidation

c)

decomposition

d)

displacement

62.

When energy is transferred from the substances to the surroundings during a chemical reaction, what type of reaction is this?

a)

endothermic

b)

exothermic

c)

decomposition

d)

combustion

63.

Which is NOT an example of something you could observe that would suggest a chemical reaction is taking place?

a)

melting

b)

fizzing

c)

smells

d)

temperature change

64.

In this chemical reaction, which is the product/s?

Magnesium + Oxygen --> Magnesium oxide

a)

magnesium

b)

magnesium and oxygen

c)

magnesium oxide

d)

oxygen

65.

What is the scientific term given when something burns?

a)

a fuel

b)

flammable

c)

combustion

d)

heating

66.

What does a fuel need in order to burn?

a)

fuel

b)

electricity

c)

oxygen

d)

hydrogen

67.

In the thermal decomposition of calcium carbonate:

Calcium carbonate --> Calcium oxide + ?

HINT: gas

a)

oxygen

b)

calcium

c)

carbon monoxide

d)

carbon dioxide

68.

What is the conservation of mass?

a)

mass of reactants > mass of products

b)

mass of reactants < mass of products

c)

mass of reactants = mass of products

69.

What is the equation involving speed, distance and time?

a)

Speed = Distance / Time

b)

Speed = Distance x Time

c)

Speed = Time / Distance

d)

Speed = Time x Distance

70.

Which of these isn't a unit for speed?

a)

m/s

b)

km/h

c)

mph

d)

km

71.

A runner runs 100m in 10s, what is their speed?

a)

10 m/s

b)

10

c)

1000 m/s

d)

0.1 m/s

72.

Using speed and time, how do you calculate distance?

a)

Distance = speed x time

b)

Distance = speed / time

c)

Distance = time / speed

d)

Distance = speed + time

73.

Using speed and distance, how do you calculate time taken?

a)

Time = distance / speed

b)

Time = speed / distance

c)

Time = speed x distance

d)

Time = distance x speed

74.

True or false. The steeper the line on a distance/time graph, the quicker the object is moving.

a)

True

b)

False

75.

What is the definition of speed?

a)

Speed is a measure of how fast an object is moving

b)

Speed is a numerical description of how far apart two things are

c)

Speed is the change in position with time of one object compared to another object

76.

What is accelerating?

a)

Increasing speed

b)

Constant speed

c)

Decreasing speed

77.

What is decelerating?

a)

Increasing speed

b)

Constant speed

c)

Decreasing speed

78.

What is the equation involving force, mass and acceleration?

a)

F = m x a

b)

F = m / a

c)

F = a / m

d)

F = m + a

79.
Friction is a force that acts in an ___________ direction of movement.
a)
similar
b)
opposite
c)
parallel
d)
west
80.
What surface would have the most friction?
a)
Glass
b)
Marble
c)
Pool table
d)
Sandpaper
81.

An object is falling downward through Earth's atmosphere. In which direction is the air resistance force?

a)

Down

b)

Up

c)

Around the object

d)

Through the object

82.

Which two of these forces act on parachutes?

a)

Air Resistance

b)

Gravity

c)

Thrust

d)

Kinetic Energy

83.

Another name for air resistance is...

a)

Buoyancy

b)

Streamline

c)

Gravity

d)

Drag

84.

The larger the surface area of the moving object, the ___________ air resistance there is.

a)

Less

b)

More

c)

Longer

d)

Quicker

85.

Air resistance pushes against falling

objects and __________________.

a)

Speeds them up

b)

Keeps them afloat

c)

Slows them down

d)

Spins them

86.

The larger the parachute the ____________

a)

Less air resistance

b)

More surface tension

c)

Less drag

d)

More drag

87.

Air resistance is a force caused by...

a)

Water pushing against moving objects

b)

Air pushing against moving objects

c)

Gravity pushing against moving objects

d)

Normal force pushing against moving objects

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