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Year 10 - Shocking Stuff & Space Revision

Total questions: 55

Worksheet time: 28mins

Name
Class
Date
1.

Electrical current in a metal wire involves the flow of:

a)

Metals

b)

Electrons

c)

Water

d)

Atoms

2.

Which of the following are needed to light up a light globe as part of an electrical circuit?

a)

The circuit must be closed

b)

The circuit must be open

c)

There must be a similarity of charge at either end of an energy source

d)

The electrons in the connecting wires must be moving in random directions

3.

Which of the following provides the most energy to moving electrons?

a)

A 1.5 V torch battery

b)

A 12 V car battery

c)

A laptop power supply of 19 V

d)

A house power supply of 240 V

4.

When batteries are stacked end to end their voltages add together. What is the total voltage provided by six 1.5 V batteries used in a torch?

a)

3V

b)

6V

c)

9V

d)

12V

5.

What is resistance?

a)

Resistance is when a material such as a wire reduces the strength of an electrical current

b)

Resistance is when a material such as a wire increases the strength of an electrical current

6.

What is resistance measured in?

a)

Amps

b)

Volts

c)

Ohms

7.

What is the standard unit of current?

a)

Amp

b)

Volt

c)

Ohms

8.

What is a measure of the amount of "push" supplied to electrons in a circuit called?

a)

Volts

b)

Amps

c)

Ohms

9.

In the diagram, what is the symbol at the top?

a)

Lamp

b)

Switch

c)

Resistor

d)

Battery

10.

In the diagram, what is the symbol on the right hand side?

a)

Lamp

b)

Switch

c)

Resistor

d)

Battery

11.

In the diagram, what is the symbol on the left side?

a)

Lamp

b)

Switch

c)

Resistor

d)

Battery

12.

Doubling the voltage supplied to a circuit will:

a)

Halve the amount of current

b)

Halve the amount of resistance

c)

Double the amount of current

d)

Double the amount of resistance

13.

A certain circuit with a 9 V battery has a current of 3 A. How much current would flow if the same circuit was powered by a 3 V battery?

a)

0.3A

b)

1A

c)

3A

d)

9A

14.

Ohm discovered that current is directly proportional to voltage: double the voltage of a circuit and you double the current

a)

True

b)

False

15.

What is the formula for Ohms Law?

a)

Current in amps (I)=volts (V)×gradient (m)Current\ in\ amps\ \left(I\right)=volts\ \left(V\right)\times gradient\ \left(m\right)

b)

Current in amps (I)=current (c)×resistor (r)Current\ in\ amps\ \left(I\right)=current\ \left(c\right)\times resistor\ \left(r\right)

c)

Current in amps (I) = volts (V)gradient (m)Current\ in\ amps\ \left(I\right)\ =\ \frac{volts\ \left(V\right)}{gradient\ \left(m\right)}

16.

The circuit in a particular walkie-talkie has a total resistance of 450 Ω and the battery is supplying 9 V. How much current, in amps (A), is flowing?

a)

53.3A

b)

5.33A

c)

0.02A

d)

0.2A

17.

A closed circuit has a 10Ω10\Omega resistor and a 20Ω20\Omega resistor. How much total resistance is there?

a)

 10Ω10\Omega  

b)

 20Ω20\Omega  

c)

 30Ω30\Omega  

d)

 40Ω40\Omega  

18.

The higher the voltage supplied to a circuit:

a)

The higher the resistance

b)

The lower the current

c)

The less energy is used in a given time

d)

The bigger the "push" received by electrons

19.

When a charged battery is connected to a closed circuit, electrons flow from the ____________ terminal to the ____________ terminal.

a)

Negative; positive

b)

Negative; negative

c)

Positive; negative

d)

Positive; positive

20.

Adding resistance to a circuit will:

a)

Do nothing

b)

Decrease the current

c)

Increase the voltage

d)

Increase the current

21.

Will the circuit work?

a)

Yes

b)

No

22.

Will the circuit work?

a)

Yes

b)

No

23.

An electrician measures the current flowing through a 1000 Ω resistor as 0.02A. The voltage supplied to this resistor must be:

a)

0.02V

b)

20V

c)

50V

d)

50,000V

24.

Any object in space tat orbits around a larger body; such as the moon or a space station is called what

a)

Terrestrial planet

b)

Gas Planet

c)

Galaxy

d)

Satellite

25.

Who do you call a planet that is mainly composed of rocks or metals and has a solid surface?

a)

Terrestrial planet

b)

Gas planet

c)

Hyper giant

d)

Super giant

26.

Which of the following is NOT a property of a star?

a)

Giant ball of gas that produces heat and light

b)

Held together by gravity

c)

Colour depends on the temperature

d)

Made of heavy elements like lead or mercury

27.

Which of the following is NOT used to classify a planet?

a)

Orbit another planet

b)

Orbit a star

c)

Be large enough to be round

d)

Have cleared its orbit of debris

28.

What is made up of the Milky Way, the Andromeda galaxy and a few smaller galaxies?

a)

The interstellar neighbourhood

b)

The virgo supercluster

c)

The local gorup

d)

The universe

29.

What is a galaxy?

a)

Two stars that orbit around each other

b)

A collection of planets that orbit around a star

c)

A collection of dust, stars and gas held together by gravity

30.

A light-year is defined as:

a)

The distance light travels in one year

b)

The distance between the sun and the earth

c)

The time it takes light to travel form the sun to earth

d)

The distance a planet travels in one revolution around the sun

31.

The light from which of these stars takes the longest time to reach earth?

a)

Canopus, 74 light years away

b)

Vega, 25 light years away

c)

Sirius, 8.6 light years away

d)

Achernar, 139 light years away

32.

It takes light from a star 3.45 light years to reach earth, how far away is the star?

a)

0.345 light years

b)

34.5 light years

c)

345 light years

d)

3.45 light years

33.

Which of the following is NOT a method used to calculate parallax?

a)

a2+b2=c2a^2+b^2=c^2

b)

asin(a)=bsin(b)=csin(c)\frac{a}{\sin\left(a\right)}=\frac{b}{\sin\left(b\right)}=\frac{c}{\sin\left(c\right)}

c)

x=b±b24ac2ax=\frac{-b\pm\sqrt{b^2-4ac}}{2a}

34.

Parallax is the apparent motion of a star. It really depends on the motion of the observer. What is the relationship between the two?

a)

The greater the motion of the observer, the greater the parallax

b)

The greater the motion of the observer, the smaller the parallax

35.

Atoms change in 2 ways, one of them being in a nuclear reaction. What is a nuclear reaction?

a)

When the bonds between atoms remain the same but the electrons change

b)

When the bonds between atoms are re-arranged

c)

When an atom's nucleus changes by gaining or losing protons or neutrons

36.

What state of matter is found in the suns core?

a)

Plasma

b)

Solid

c)

Liquid

d)

Gas

37.

In the process of nuclear fusion, _________ fuse together and release ___________

a)

Photons, protons

b)

Protons, photons

38.

The innermost layer of the sun is called the ___________

a)

Core

b)

Mantle

c)

Nucleus

d)

Plasma

39.

The innermost layer of the sun is called the ___________

a)

Core

b)

Mantle

c)

Nucleus

d)

Plasma

40.

The outward force of nuclear fusion int he sun is equivalent to 10 billion hydrogen bombs exploding every second. What holds the sun together and keeps it stable?

a)

The attraction between protons and electrons in plasma

b)

The inward pull of gravity

c)

The balance between hydrogen and helum

d)

The magnetic field created by plasma in the suns core

41.

What is a nebula?

a)

Area of vast clouds of dust and gas where stars are formed

b)

A type of star that turns into other stars

c)

The debris of exploded planets

d)

A network of matured stars

42.

Over hundreds of thousands of years, protostars get hotter and hotter. what is the main cause of this rise in temperature?

a)

Nuclear fusion

b)

The compression of matter

c)

The gas and dust is already hot

43.

In a main sequence star, the outward force of nuclear fusion is balanced by which inward force?

a)

Magnetism

b)

Friction

c)

Tension

d)

Gravity

44.

As a star starts to run out of hydrogen in its core, the core becomes:

a)

Hotter and more dense

b)

Cooler and less dense

45.

How does a red giant turn into a planetary nebula?

a)

The entire star exposed and drifts out into space

b)

The outer layers collapse in on the core

c)

The outer layers drift outwards into space because gravity is too weak to hold them in place

46.

Supernovas are formed when what kind of stars explode?

a)

White dwarfs

b)

Main sequence

c)

Red supergiants

d)

Red dwarfs

47.

Stars 8-20 times more massive than the sun after they explode leave behind _____________

a)

Neutron stars

b)

Black holes

48.

Supernovas can turn into either _________ depending on the size of the star

a)

Neutron stars or black holes

b)

Neutron stars or white dwarfs

c)

Black holes or white dwarfs

49.

A star expands to become a red giant when:

a)

It sucks in gas from a nearby star

b)

It begins to form iron, which glows red

c)

Its gravity become strong enough to overcome fusion

d)

Its core becomes hot enough to fuse helium

50.

Neutron stars that spin fast that release 2 beams of radiation beams are called what?

a)

Event horizons

b)

Planetary nebulas

c)

Pulsars

51.

Which of the following is not a property of a black hole?

a)

Singularity event

b)

Event horizon

c)

Accretion disk

d)

Two radiation beams

52.

Which statement below describes 'absolute magnitude'?

a)

The brightness of stars if they were the same distance from earth

b)

The weight of stars if they were the same distance from earth

c)

The gravity of star if they were the same distance from earth

53.

Different types of telescopes are used because they can detect different frequencies of the electromagnetic spectrum to create interstellar images

a)

True

b)

False

54.

The Hertzpring-Russel is used to identify a stars _____________

a)

Brightness and weight

b)

Brightness and temperature

c)

Temperature and weight

d)

Temperature and distance from earth

55.

Which of the following is NOT part of the main 4 classifications on the Hertzpring-Russel diagram?

a)

Supergiants

b)

White dwarfs

c)

Blue giants

d)

Giants