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Junior cert science physical world MS

Total questions: 50

Worksheet time: 31mins

Name
Class
Date
1.
Volume is 
a)
the amount of space an object takes up.
b)
the amount of matter in an object.
c)
the distance from one point to another.
d)
the amount of heat in a substance.
2.

The Basic unit for measuring length in the Metric system

a)

Meter

b)

Liter

c)

inches

d)

yards

3.

What is mass?

a)

How much SPACE something takes up.

b)

How big something is.

c)

How much of something there is.

4.

A solid piece of plastic has a density of 1.5g/cm3. Will it FLOAT or SINK in water?

a)

Float

b)

Sink

5.

What is the energy conversion when you plug in a stereo and listen to music?

a)

electrical to mechanical

b)

chemical to heat

c)

electrical to sound

d)

potential to sound

6.

What is the energy conversion when you put batteries in a flashlight to make it turn on?

a)

chemical to light

b)

light to kinetic

c)

chemical to thermal

d)

nuclear to light

7.

What is the energy conversion when photosynthesis takes place as the sun makes a plant grow?

a)

thermal to chemical

b)

potential to nuclear

c)

chemical to potential

d)

light to chemical

8.

Fossil fuels _______________________________. That means there is a limited supply. Once the world runs out, there is no way to get more.

a)

are clean-burning

b)

are non-renewable resources

c)

came to Earth on comets

d)

are found in fossilized sea shells

9.

Where on the track does the roller coaster train have the greatest potential energy?

a)

Point 1

b)

Point 2

c)

Point 3

d)

Point 4

e)

Point 5

10.

What is energy?

a)

moving energy

b)

stored energy

c)

renewable energy

d)

The ability to do work.

11.

The unit of work is

a)

watt

b)

hertz

c)

joule

d)

pascal

12.
Where does most of the energy go in this transformation.
a)
Electrical energy
b)
Light
c)
Heat
d)
other
13.

The energy efficiency shown in this diagram is:

a)

About 10%.

b)

About 30%.

c)

About 60%.

d)

Impossible to tell.

14.

What is Conduction?

a)

When heat is passed from particle to particle through an object.

b)

When particles get heated, expand, and become less dense.

c)

When heat transfers by waves through empty space.

15.

Is this item a conductor or insulator?

a)

conductor

b)

insulator

16.
Heat is transferred from one particle of matter to another without the movement of matter itself in a process called
a)
conduction.
b)
convection.
c)
radiation.
d)
insulation.
17.

The water is heated strongly at the top, but the ice only melts very slowly. Why does the ice melt so slowly?

a)

Thermal energy always travels upwards.

b)

Hot water is more dense than cold water.

c)

Metal gauze does not allow heat to pass through.

d)

Water is a poor thermal conductor.

18.

Between which two points is the substance changing from a liquid to a gas?

a)

Q and R

b)

R and S

c)

S and T

19.

The gees fly 23 Km/hr to the south when they migrate for the winter.

a)

speed

b)

velocity

c)

acceleration

20.
What is the person doing from 5 seconds to 10 seconds?
a)
Walking 
b)
Running
c)
Standing Still 
d)
Walking Fast
21.
What is this graph showing?
a)
Constant Speed
b)
Acceleration (speeding up)
c)
Deceleration (slowing down)
d)
No motion
22.
A roller coasters accelerates from an initial velocity of 6.0 m/s to a final velocity of 70 m/s over 4 seconds.  What's the acceleration?
a)
24 m/s2
b)
18 m/s2
c)
16 m/s2
d)
16 m/s
23.

A measure of the quantity of matter is

a)

density.

b)

weight.

c)

volume.

d)

mass.

24.
An eraser 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
25.
a)
Series circuit
b)
Incomplete circuit
c)
Parallel circuit
d)
Power source
26.
The flow of electricity through a conductor
a)
Battery
b)
Current
c)
Static electricity
d)
Switch
27.
a)
Parallel circuit
b)
Series circuit
c)
Incomplete circuit
d)
Switch
28.
An electrical force which occurs as electrons are built up in an object
a)
Complete circuit
b)
Static electricity
c)
Power source
d)
Load
29.
The tendency for a material to oppose the flow of electrons, changing electrical energy into thermal energy and light.
a)
Voltage
b)
Current
c)
Resistance
d)
Circuit 
30.

Which of the following is the SI unit for electric current?

a)

Ohm

b)

Watt

c)

Ampere

d)

Volt

31.
This bullseye demonstrates...
a)
High Accuracy & High Precision
b)
High Accuracy & Low Precision
c)
Low Accuracy & High Precision
d)
Low Accuracy & Low Precision
32.

What quantity does the instrument shown measure?

a)

Temperature

b)

Force

c)

Time

d)

Volume

33.
The application of scientific knowledge of materials and processes to benefit people is also known as...
a)
technology
b)
model
c)
society
d)
project
34.
Which direction will the heat flow while this person holds a hot cup of tea?
a)
from the cup to her hand
b)
from her hand to the cup
c)
no heat is transferred
35.

Claim: Carbon dioxide (CO2) emissions can be reduced by increasing the amount of electricity produced by wind.

Which pair of graphs, showing data for CO2 emissions and wind production of electricity would support this claim?

a)
b)
c)
d)
36.
How will this object move? 
a)
It won't move. 
b)
It will move to the right. 
c)
It will move to the left. 
d)
It will move in both directions. 
37.

To use an LED, you need to connect it in a circuit with a...

a)

resistor

b)

capacitor

c)

transistor

d)

inductor

38.
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
39.

A vernier calliper is sued to measure the

a)

length of a football pitch

b)

diameter of a coin

c)

volume of a liquid

40.

If a kettle has a power rating of 5 kW is used for 2 hours every day for a week, how many units of electricity are used?

a)

14 kWh

b)

49 kWh

c)

140 kWh

d)

70 kWh

41.

In a tug of war the left team pulls with a force of 200N. The right team pulls with a force of 150N.What is the resultant force?

a)

50N to the left.

b)

350N to the right.

c)

350N to the left.

d)

50N to the right.

42.

Which of the following is an example of a contact force?

a)

Electrostatic force (静电力）

b)

Magnetic force

c)

Frictional force

d)

Gravitational force

43.

Force does not change the ______ of the object.

a)

speed

b)

direction

c)

shape and size

d)

mass

44.

LED will work only if it is connected to a battery in

a)

Forward biased

b)

Reverse biased

c)

Both case

d)

Without battery

45.
To complete a circuit the switch must be
a)
unattached
b)
open
c)
closed
d)
It depends
46.
Read this scientific instrument to the nearest tenth. 
a)
6.3 mL
b)
6.6 mm
c)
6.6 mL
d)
6.3 mm
47.
Velocity is both ____ and _____. 
a)
speed , direction 
b)
direction, mass
c)
volume, density 
d)
direction, magnitude 
48.

If the original length of a spring is 20 cm and its extended length is 30 cm. What is the extension?

a)

20 cm

b)

30 cm

c)

50 cm

d)

600 cm

e)

10 cm

49.
A person would weigh less on on the Moon than on the Earth because . . .
a)
Moon has more mass, and therefore more gravity
b)
Moon has less mass, and therefore more gravity
c)
Moon has more mass, and therefore less gravity
d)
Moon has less mass and therefore less gravity
50.
You do 90 joules of work in 30 seconds. How much power have you generated?
a)
30 watts
b)
3 watts
c)
120 watts
d)
270 watts

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