science test 3 y7
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36 Terms
What is energy measured in?
Joules and kilojoules
What is renewable energy
Energy that has an infinite amount of energy e.g. wind and solar
What is non renewable energy
Energy that has a finite amount e.g. oil and nuclear.
What is energy transfer?
Energy transfer is the direct temperature or change in temperature
What is power
It is the rate that at which energy is transferred
What is the formula to calculate energy
Energy = Power x Time
What is the formula to calculate the running cost of a lamp?
Cost = Power x Time x Price
What is the formula to calculate power
Power = Energy/Time
What does 𝑥/s mean
It’s means rate
How many watts is a kilo watt
1000 watts is 1 kilo watt
What circuit symbol is this
Switch
What circuit symbol is this?
Cell
What circuit symbol is this
Battery
What circuit symbol is this
Battery
What circuit symbol is this
Lamp
What circuit symbol is this
Voltmeter
What circuit symbol is this
Ammeter
What circuit symbol is this
Buzzer
What circuit symbol is this
Variable resistor
What circuit symbol is this
Resistor
What circuit symbol is this
Motor
What circuit symbol is this
LED
What is an electric current
An electric current is the flow of electric charges(electrons) in a circuit
What is an electron
A negatively charged particle
What is the potential difference of a cell
It is measure of the amount of the energy given by the cell to moving electrons.
What is the units of currents
Amp
What is the unit of P.D
Voltage
What does the voltmeter measure
The potential difference
Explain why the potential difference changed when you add more cells
The potential difference changes when you add more cells as more cells give you more energy
What is the independent variable
What you/I change in a investigation
What is a dependent variable
What you measure to judge the effect of changing the independent variable
What is a control variable
What you must keep the same
How are categoric variables plotted
Bar chart
How are continuous variable plotted
Line graph
Which axis does the independent variable go on
X axis
Which axis is the dependant variable plotted on
Y axis
Note 
Flashcards (20)