Stored Energy in Fuels
Where is energy stored?
Fuels
Name the components of a torch circuit.
Wire, cell, switch, bulb
Define elastic
A material that returns to its original shape quickly after it is bent or stretched
Define a fulcrum
The centre point
Define an orbit
The path an object travels around another object
Is the following statement true or false?
Wood gives off movement energy when burned
False - It gives off heat and light
A torch circuit is called....
an electrical system
TThe more you pull on a capatult the ...... the stone goes
further
True or false:
A wheel and axle is an example of a mechanism
True
Earth revolves in:
12 hours
1 year
24 hours
12 months
24 hours
Which if these is input energy:
a) Wood
b) wax
c)matches
d) Lighter
e) Gas
c and d
What is a socket?
A device that you plug a device into to activate mains electricity
A jack in the box is an example of a .... spring
compressed spring
If a wheel is fixed onto an axle, and the axle moves around this is called a
Turning axle system
Earth rotates once around the sun every 24 hours
False rotates on its axis
What does a candle need to burn?
Fuel
Oxygen
Input energy
What is the source of most electricity in South AFrica?
Coal
a bird in the cage / thaumatrope is an example of a stretched or twisted elastic
twisted elastic
What is one of the most important inventions of all time
Wheel and axle system
The earth is on a path around the sun. How long does this take? What is the name of the pathway.
orbit
365 days
PASS stands for a way to use an extinguisher. What do the leters remind you to do?
Pull the pin
Aim at the base of the fire
Squeeze the trigger
Sweep from side to side
True of False:
Electricity does not go through rubber and plastic.
True - they are insulators
When an elastic is released the stored energy changes to ....
movement / kinetic energy
Vehicles with a wheel and axle sytsem are:
Pogo stick
Hinge
Ball point pen
Crane
Hinge
Crane
In which direction does earth rotate?
anticlockwise