Circuits
What unit is voltage measured in?
Volts (V)
What are two types of energy?
Kinetic, potential, thermal, chemical, electrical, sound
What are the 2 types of energy resources?
Renewable and non-renewable
What is meant by the term 'renewable energy'
A resource that can be replaced, clean for the environment
What has happened to the world's population in the last 100 years?
It has quadrupled - 2 billion to 8 billion
What unit is resistance measured in?
Ohms
What is the energy transfer involved in clapping your hands?
Kinetic energy to sound energy
What is energy conservation?
Reducing the amount of energy used
What are two disadvantages of using solar energy?
Weather dependent, high cost, not efficient
How many marine mammals are killed each year from plastic in the ocean?
Just over 1 million
If the voltage increases in a circuit, what would happen to the current?
It would increase
Can energy ever be created or destroyed?
No - it is always transferred from one type to another
How does a coal power plant generate electricity?
Coal is burned to heat water, steam is created to turn a turbine
How is ethanol used as a fuel resource?
In petrol - E10
Name one marine species that has gone extinct in the last 200 years?
Steller's sea cow, sea mink, caribbean monk seal
What is the formula for Ohm's Law?
V=IR
Name one energy transfer that is not useful
Car engine - sound and heat produced, light bulbs - heat produced, phone charging - heat produced
What are two problems with burning fossil fuels?
Produces pollution (CO2) and we will run out
What is the name of Australia's largest hydroelectric scheme?
Snowy Hydro
How many pieces of plastic are estimated to be in the ocean?
5 trillion
If the battery in a circuit is 24V and the resistance is 12 ohms, what is the current?
2 amps
How does popcorn demonstrate energy transfer?
What are two advantages of burning fossil fuels?
Cheap, efficient, can be stored, creates jobs
Where in Australia are most of our wind farms?
South Australia, most southern states. None in the northern states.
What does CER stand for?
Claim, Evidence, Reasoning