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WorksheetsYear 10 - Shocking Stuff & Space Revision
Total questions: 55
Worksheet time: 28mins
Electrical current in a metal wire involves the flow of:
Metals
Electrons
Water
Atoms
Which of the following are needed to light up a light globe as part of an electrical circuit?
The circuit must be closed
The circuit must be open
There must be a similarity of charge at either end of an energy source
The electrons in the connecting wires must be moving in random directions
Which of the following provides the most energy to moving electrons?
A 1.5 V torch battery
A 12 V car battery
A laptop power supply of 19 V
A house power supply of 240 V
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?
3V
6V
9V
12V
What is resistance?
Resistance is when a material such as a wire reduces the strength of an electrical current
Resistance is when a material such as a wire increases the strength of an electrical current
What is resistance measured in?
Amps
Volts
Ohms
What is the standard unit of current?
Amp
Volt
Ohms
What is a measure of the amount of "push" supplied to electrons in a circuit called?
Volts
Amps
Ohms
In the diagram, what is the symbol at the top?
Lamp
Switch
Resistor
Battery
In the diagram, what is the symbol on the right hand side?
Lamp
Switch
Resistor
Battery
In the diagram, what is the symbol on the left side?
Lamp
Switch
Resistor
Battery
Doubling the voltage supplied to a circuit will:
Halve the amount of current
Halve the amount of resistance
Double the amount of current
Double the amount of resistance
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?
0.3A
1A
3A
9A
Ohm discovered that current is directly proportional to voltage: double the voltage of a circuit and you double the current
True
False
What is the formula for Ohms Law?
Current in amps (I)=volts (V)×gradient (m)
Current in amps (I)=current (c)×resistor (r)
Current in amps (I) = gradient (m)volts (V)
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?
53.3A
5.33A
0.02A
0.2A
A closed circuit has a 10Ω resistor and a 20Ω resistor. How much total resistance is there?
10Ω
20Ω
30Ω
40Ω
The higher the voltage supplied to a circuit:
The higher the resistance
The lower the current
The less energy is used in a given time
The bigger the "push" received by electrons
When a charged battery is connected to a closed circuit, electrons flow from the ____________ terminal to the ____________ terminal.
Negative; positive
Negative; negative
Positive; negative
Positive; positive
Adding resistance to a circuit will:
Do nothing
Decrease the current
Increase the voltage
Increase the current
Will the circuit work?
Yes
No
Will the circuit work?
Yes
No
An electrician measures the current flowing through a 1000 Ω resistor as 0.02A. The voltage supplied to this resistor must be:
0.02V
20V
50V
50,000V
Any object in space tat orbits around a larger body; such as the moon or a space station is called what
Terrestrial planet
Gas Planet
Galaxy
Satellite
Who do you call a planet that is mainly composed of rocks or metals and has a solid surface?
Terrestrial planet
Gas planet
Hyper giant
Super giant
Which of the following is NOT a property of a star?
Giant ball of gas that produces heat and light
Held together by gravity
Colour depends on the temperature
Made of heavy elements like lead or mercury
Which of the following is NOT used to classify a planet?
Orbit another planet
Orbit a star
Be large enough to be round
Have cleared its orbit of debris
What is made up of the Milky Way, the Andromeda galaxy and a few smaller galaxies?
The interstellar neighbourhood
The virgo supercluster
The local gorup
The universe
What is a galaxy?
Two stars that orbit around each other
A collection of planets that orbit around a star
A collection of dust, stars and gas held together by gravity
A light-year is defined as:
The distance light travels in one year
The distance between the sun and the earth
The time it takes light to travel form the sun to earth
The distance a planet travels in one revolution around the sun
The light from which of these stars takes the longest time to reach earth?
Canopus, 74 light years away
Vega, 25 light years away
Sirius, 8.6 light years away
Achernar, 139 light years away
It takes light from a star 3.45 light years to reach earth, how far away is the star?
0.345 light years
34.5 light years
345 light years
3.45 light years
Which of the following is NOT a method used to calculate parallax?
a2+b2=c2
sin(a)a=sin(b)b=sin(c)c
x=2a−b±b2−4ac
Parallax is the apparent motion of a star. It really depends on the motion of the observer. What is the relationship between the two?
The greater the motion of the observer, the greater the parallax
The greater the motion of the observer, the smaller the parallax
Atoms change in 2 ways, one of them being in a nuclear reaction. What is a nuclear reaction?
When the bonds between atoms remain the same but the electrons change
When the bonds between atoms are re-arranged
When an atom's nucleus changes by gaining or losing protons or neutrons
What state of matter is found in the suns core?
Plasma
Solid
Liquid
Gas
In the process of nuclear fusion, _________ fuse together and release ___________
Photons, protons
Protons, photons
The innermost layer of the sun is called the ___________
Core
Mantle
Nucleus
Plasma
The innermost layer of the sun is called the ___________
Core
Mantle
Nucleus
Plasma
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?
The attraction between protons and electrons in plasma
The inward pull of gravity
The balance between hydrogen and helum
The magnetic field created by plasma in the suns core
What is a nebula?
Area of vast clouds of dust and gas where stars are formed
A type of star that turns into other stars
The debris of exploded planets
A network of matured stars
Over hundreds of thousands of years, protostars get hotter and hotter. what is the main cause of this rise in temperature?
Nuclear fusion
The compression of matter
The gas and dust is already hot
In a main sequence star, the outward force of nuclear fusion is balanced by which inward force?
Magnetism
Friction
Tension
Gravity
As a star starts to run out of hydrogen in its core, the core becomes:
Hotter and more dense
Cooler and less dense
How does a red giant turn into a planetary nebula?
The entire star exposed and drifts out into space
The outer layers collapse in on the core
The outer layers drift outwards into space because gravity is too weak to hold them in place
Supernovas are formed when what kind of stars explode?
White dwarfs
Main sequence
Red supergiants
Red dwarfs
Stars 8-20 times more massive than the sun after they explode leave behind _____________
Neutron stars
Black holes
Supernovas can turn into either _________ depending on the size of the star
Neutron stars or black holes
Neutron stars or white dwarfs
Black holes or white dwarfs
A star expands to become a red giant when:
It sucks in gas from a nearby star
It begins to form iron, which glows red
Its gravity become strong enough to overcome fusion
Its core becomes hot enough to fuse helium
Neutron stars that spin fast that release 2 beams of radiation beams are called what?
Event horizons
Planetary nebulas
Pulsars
Which of the following is not a property of a black hole?
Singularity event
Event horizon
Accretion disk
Two radiation beams
Which statement below describes 'absolute magnitude'?
The brightness of stars if they were the same distance from earth
The weight of stars if they were the same distance from earth
The gravity of star if they were the same distance from earth
Different types of telescopes are used because they can detect different frequencies of the electromagnetic spectrum to create interstellar images
True
False
The Hertzpring-Russel is used to identify a stars _____________
Brightness and weight
Brightness and temperature
Temperature and weight
Temperature and distance from earth
Which of the following is NOT part of the main 4 classifications on the Hertzpring-Russel diagram?
Supergiants
White dwarfs
Blue giants
Giants
