Shared Flashcard Set

Details

S1 Unit 2 Energy
FC Questions
33
Science
Not Applicable
02/04/2012

Additional Science Flashcards

 


 

Cards

Term
What is the main form of energy from a fire ?
Definition
heat
Term
What is the main form of energy from a torch ?
Definition
light
Term
What is the form of energy used by a TV?
Definition
electrical
Term
What is the form of energy coming from a radio?
Definition
sound
Term
What is the form of energy all moving objects have ?
Definition
kinetic
Term
What is the energy change in a kettle?
Definition
electrical → heat + sound
Term
What is the energy change in a light bulb ?
Definition
electrical → light + heat
Term
What is the name for stored energy?
Definition
potential
Term
What form of energy is stored in food, fuels and batteries ?
Definition
chemical
Term
What form of energy is stored in atoms?
Definition
nuclear
Term
What form of energy is stored in a person at the top of a slide ?
Definition
gravitational
Term
What form of energy is stored in a stretched catapult ?
Definition
elastic
Term
What is the energy change when wood is burned?
Definition
chemical → heat.(wood)
Term
What is the energy change when a mobile phone is on?
Definition
chemical → electrical
Term
What is the energy change when an apple falls off a tree?
Definition
gravitational → kinetic
Term
What is the energy change when you climb up stairs ?
Definition
chemical → kinetic → gravitational
Term
What is the Unit of energy?
Definition
joule
Term
If a car uses 5000J of chemical energy to make 4000J of kinetic energy how much energy is wasted ?
Definition
1000J
Term
How do you calculate % efficiency of a machine
Definition
useful energy÷ starting energy x 100
Term
What is the calculation for the % efficiency of a kettle that uses 100J of energy to make 80J of heat?
Definition
80÷100 x100 (=80%)
Term
What does friction mean?
Definition
when kinetic energy of surfaces rubbing against each other is transformed into heat
Term
When electric currents flow in wires what from of energy is produced?
Definition
heat
Term
How is electrical energy generated?
Definition
a moving magnet in a coil of wire
Term
What fuels are used in the majority of our electricity generation?
Definition
fossil fuels
Term
What is the energy change in the boiler of a power station?
Definition
chemical → heat (boiler)
Term
What is the steam used for in a power station?
Definition
to turn the turbines
Term
What is the energy change in a generator ?
Definition
kinetic → electrical
Term
Why do we need alternative ways of making electricity other than burning fossil fuels?
Definition
they are non-renewable and will run out
Term
How does a nuclear power station differ from a fossil fuel power station?
Definition
the heat is made by a nuclear reaction rather than burning a fuel
Term
How is a nuclear power station the same as a fossil fuel power station?
Definition
the heat boils water to make steam (the steam turns turbines the turbines turn a generator)
Term
What are four examples of renewable sources of energy?
Definition
Wind, Hydroelectric, Solar, Wave
Term
What is an advantage of wind energy?
Definition
renewable energy/does not produce waste gases
Term
What is a disadvantage of wind energy?
Definition
unreliable as no wind = no energy/ people do not like the appearance of the turbines
Supporting users have an ad free experience!