Energy revision yr 9

Science Block 3

Where does our energy come from?

Multiple Select

Choose ALL of the nonrenewable energy resources

• sun

• fossil fuels

• nuclear fuel

• wind

• natural gas

Multiple Choice

Nuclear Fuel produce dangerous wastes that remain radioactive for thousands of years

• Pro

• Con

Multiple Choice

Nuclear fuel produces a large amount of energy and does not cause air pollution

• Pro

• Con

Multiple Choice

Fossil Fuels can cause acid rain and smog. Is this a pro or con

• Pro

• Con

Multiple Choice

Fossil Fuels are inexpensive to obtain and use. Is this a pro or con?

• Pro

• Con

Multiple Choice

Fossil fuels are Renewable resources. True or False?

• True
• False

Multiple Choice

what is a non renewable resource?

• water
• wind
• coal
• biomass

Multiple Choice

Non-Renewable resources are also known as what?

• Fossil Fuels
• Renewable
• Solar Energy
• Hydroelectric Energy

Multiple Choice

Which renewable energy source uses the superheated water below earth's surface to spin a turbine and generator?

• hydroelectric dam
• geothermal power
• wind farm
• hydrogen fuel

Multiple Choice

Which of these is a disadvantage of windmills?

• amount of land required
• time to construct one
• the availability of wind
• the location of reliable wind

Multiple Choice

Which is NOT an advantage of geothermal power?

• renewable
• no pollution
• you don't have to transport it
• geysers and volcanoes are everywhere

Multiple Choice

What is the best pro about renewable resources? 

• The are inexpensive 
• They are always available
• They are expensive
• They create pollution  

Multiple Choice

Energy we get from burning living things

• Hydroelectricity 
• Wind Energy
• Biomass Fuel
• Hydrogen Power

Multiple Choice

What is an example of a renewable resource?

• hydroelectric
• oil
• coal
• fossil fuel

Multiple Choice

The house illustrated here uses panels on the roof to collect a natural resource and convert it into electricity that can be used.
Which alternative energy source does this house use?

• Water
• Wind
• Solar
• Geothermal

Multiple Choice

_____________ power is electricity produced by flowing water.

• Solar 
• Wind 
• Hydroelectric 
• water

Multiple Choice

Renewable energy resources produce less_____________ than fossil fuels.

• pollution

• energy

• wind

• light

Multiple Choice

Why is solar energy considered renewable energy?

• It's cheaper than fossil fuels
• The sun's energy would not run out for billions of years
  
• Solar energy recharges batteries
• All of them

Multiple Choice

What is the unit of energy

• Newton (N)

• kilogram (kg)

• Joule (J)

• Watt (W)

Multiple Choice

After an energy conversion, you end up with the same total amount of energy as the original amount of potential energy. Which of the following laws explains this rule?

• a. law of energy changes
• b. law of conservation of energy
• c. law of power and energy
• d. law of potential energy

Multiple Choice

Every moving object has energy in this energy store

• Kinetic

• Elastic

• Chemical

• Nuclear

Multiple Choice

Energy stored in the nucleus of an atom

• Nuclear

• Magnetic

• Electrostatic

• Chemical

Multiple Choice

A stretched rubber band has energy in this energy store

• Magnetic

• Electrostatic

• Elastic

• Nuclear

Multiple Choice

Food, fuels and batteries have energy in this energy store

• Chemical

• Thermal

• Gravitational Potential

• Elastic

Multiple Choice

Hot objects have energy in this energy store

• Thermal

• Elastic Potential

• Gravitational Potential

• Chemical

Multiple Choice

Hot objects have energy in this energy store

• Thermal

• Elastic Potential

• Gravitational Potential

• Chemical

Multiple Choice

Which of these equations is correct?

•  $efficiency\ =\ \frac{useful\ energy\ transferred}{total\ energy\ transferred}$  

•  $efficiency\ =\ \frac{total\ energy\ transferred}{useful\ energy\ transferred}$  

•  $energy\ =\ efficiency\ \times100\%$  

•  $efficiency\ =\ \frac{wasted\ energy\ transferred}{total\ energy\ tranferred}$  

Multiple Choice

Total energy = 350J
Useful energy = 70J

Workout the efficiency of this iphoneX.
 $efficiency\ =\ \frac{useful\ energy}{total\ energy\ in}\ \times100\%$  

• 100%

• 80%

• 40%

• 20%

Multiple Choice

Total energy = 200J
Useful energy = 20J

Workout the efficiency of this lightbulb.
 $efficiency\ =\ \frac{useful\ enegy}{total\ energy\ in}\ \times100$  

• 100%

• 80%

• 40%

• 10%

Multiple Choice

What is the efficiency of a machine if 55.3 J of work are done on the machine, but only 14.3 J or work are done by the machine?

• 0.25 Joules
• 26%
• 3.86 Joules
• 386%

Multiple Choice

Which energy transformation occurs in a toaster?

• chemical to electric
• electric to thermal
• kinetic to chemical
• thermal to potential

Multiple Choice

A material that transfers energy easily.

• insulator
• heat
• conduction
• conductor

Multiple Choice

A material that reduces or prevents the transfer of energy.

• conductor
• conduction
• radiation
• insulator

Multiple Choice

What is the wasted energy here? (we want sound)

• electrical

• heat

• chemical

Multiple Choice

What is the wasted energy here? (we want heat and light)

• electrical

• sound

• chemical

Multiple Choice

What is the wasted energy here? (we want movement)

• heat, light and sound

• chemical, electrical and movement

• Sound, sound and sound

Multiple Choice

What is the wasted energy here? (we want movement)

• heat, light and sound

• chemical, electrical and movement

• Sound, sound and sound

Multiple Choice

E = 500 Joules

T = 25 seconds

P = ???

• 0.05 W

• 20 W

• 12500 W

• 2000 W

Multiple Choice

What is the equation for power and energy?

• P = E/t
• E = P/t
• T = P x E
• P = W/t

Multiple Choice

Which of these is a measurement of power?

• 100 joules
• 100 watts
• 100 meters per second
• 100 hertz

Multiple Choice

The unit for Electrical Power is

• hour

• ampere

• watt

• Volt

Multiple Choice

The S.I unit for Electrical Energy is

• kwh

• KWj

• kWh

• KWJ

Multiple Choice

A 5kW electric slow cooker is used for 4.5 hours to cook. Calculate the cost of electrical energy used if the rate per unit is 12 p.

• 67p

• 0.375 p

• 0.54 p

• 54 p

Multiple Choice

Heat transfer by conduction occurs when...

• particles collide into each other

• large numbers of atoms move from place to place

• atoms give off heat in the form of electromagnetic waves

• electromagnetic waves travel from place to place through a vacuum

Multiple Choice

Heat transfer always moves ...

• colder to hotter

• east to west

• hotter to colder

• north to south

Multiple Choice

Where do we see conduction in a pot of boiling water on the stove?

• The water heats up by touching the hot, metal pot.

• The steam from the hot water rises out of the pot.

• The heat from the fire can be felt on all sides.

Multiple Choice

Which material is the best conductor of heat?

• Wood
• Plastic
• Glass
• Steel

Multiple Choice

Why do metals conduct thermal energy more quickly?

• Particles vibrate faster

• Due to the presence of bound electrons

• Due to the presence of delocalised electrons

• Metals are grey

Multiple Choice

Convection can take place in ____________.

• solids only

• liquids only

• fluids

• solids, liquids and gases.

Multiple Choice

When air is heated, it's density becomes ___________.

• more dense

• less dense

• remains the same

Multiple Choice

When air is heated, its volume ____________.

• expands

• contracts

• remains the same

Multiple Choice

In the process of convection, energy is transferred _________.

• because of temperature differences in a solid

• because of density differences in a liquid

• by the diffusion of molecules throughout a fluid

• by the vibration of molecules

Multiple Choice

The diagram shows a refrigerator. The cooling unit is placed at the top. The cooling unit cools the air near it. What happens to the density of the air as it cools, and how does it move?

• The density of air increases. It moves down.

• The density of air increases. It moves up.

• The density of air decreases. It moves down.

• The density of air increases. It moves up.

Multiple Choice

What is infrared radiation?

• The circulation of a fluid caused by heating it.
• Transfer of heat inside a metal.
• Heat energy transfer by electromagnetic waves
• Transfer of light energy

Multiple Choice

Which of the following is best at reflecting infrared radiation?

• Dark, matt surface
• Light, shiny surface
• Dark, shiny surface

Multiple Choice

Which of the following is the best at absorbing infrared radiation?

• Dark, matt surface
• Light, shiny surface
• Dark, shiny surface

Multiple Choice

Which of the following is the best at emitting infrared radiation?

• Dark, matt surface
• Light, shiny surface
• Dark, shiny surface

Multiple Choice

Infrared radiation cannot pass through a vacuum (T/F)

• True

• False

Multiple Choice

The three cans were all filled with boiling water they were left for ten minutes and then the temperature of the water was measured again. In which can would the water temperature be the lowest?

• A

• B

• C

• There would be no difference.