Types of Energy
The energy of movement is...
a) Kinetic
b) Gravitational Potential
c) Light
a) Kinetic
Energy cannot be ________ or ___________.
It can only be transferred and transformed.
Energy cannot be created or destroyed.
True or false: A pumped hydro dam uses the gravitational potential energy of water to spin a turbine and generate electrical energy.
True
Which of the following is an example of kinetic energy:
a) a ball falling
b) a ball sitting still
c) a fully stretched rubber band
a) a ball falling
What type of energy do we 'gain' from eating animals?
a) kinetic
b) sound
c) chemical
c) chemical
A book is sitting on a high shelf. What is the main form of energy?
a) Kinetic
b) Gravitational Potential
c) Sound
b) Gravitational Potential
Which of the following is an example of a transfer of kinetic energy?
a) a man climbing a hill
b) a rubber band being stretched
c) a man kicking a ball
c) a man kicking a ball
The pumped hydro dam provides more jobs. Is this an advantage or disadvantage to locals?
advantage
Which has the higher gravitational potential energy?
A 2kg box 5 meters above ground level
OR
A 2kg box 2 meters above ground level
A 2kg box 5 meters above ground level
What two main types of energy does the sun give off?
a) Light and heat
b) Sound and heat
c) Light and kinetic
a) Light and heat
An example of chemical energy would be:
a) a spring being compressed
b) a ball falling
c) eating a burger
c) eating a burger
A box is dropped. This is a transformation of:
a) electrical -> heat and light
b) gravitational potential -> kinetic and heat
c) kinetic -> gravitational potential and heat
b) gravitational potential -> kinetic and heat
A pumped hydro dam uses the gravitational potential energy of water to spin a turbine. By spinning the turbine, the gravitational potential energy is mostly transformed into...
a) kinetic energy
b) sound energy
c) chemical energy
a) kinetic energy
Which is an example of gravitational energy transforming into kinetic energy?
a) a ball hitting a bat
b) a man running up a hill
c) a sausage rolling down a hill
c) a sausage rolling down a hill
A man picks up a book. This is an example of an energy chain:
a) gravitational potential -> kinetic and heat
b) chemical -> kinetic and heat
c) kinetic -> gravitational potential and heat
c) kinetic -> gravitational potential and heat
What energy is displayed in a compressed spring?
Elastic
When a roller coaster travels down a hill, gravitational potential energy transforms into what one main type of energy?
kinetic
What is one advantage and one disadvantage of a pumped hydro dam for Queenslanders.
Advantage - more power supply, less green-house gases
Disadvantage - cost money, could cause environmental impacts
Does a skateboarder have kinetic or gravitational potential energy when they are half way down the ramp?
Both
A man kicks a ball. What is the main energy type missing from the following energy chain:
Sun (light energy) -> grass (chemical energy) -> beef (? energy) -> human (kinetic energy) -> ball (kinetic energy)
chemical energy
Which energy is a form of kinetic energy caused by vibrating objects?
Sound
When a man climbs a hill, what are the main energy transformations that occur?
__________ -> ____________
-> ____________
kinetic -> gravitational potential
-> heat
Explain how a hydro pump dam works.
The water is released from a high reservoir. The gravitational potential energy of the water is transformed into kinetic energy by the spinning turbine. The kinetic energy of the spinning turbine is transformed into electrical energy by a generator. The water is caught at the bottom, and pumped back into the high reservoir by excess electrical energy.
If a pendulum starts at a height of 1m, will it ever reach a height of 2m? Explain your answer in terms of energy.
No - the ball only has enough gravitational kinetic energy to reach a height of 1m. As energy cannot be created out of nothing, it needs to be transferred more energy to swing higher.
Draw an energy chain that shows how humans get energy from the sun to move (hint: there should be 5 steps).
Make sure to include not only the main energy types transferred, but also the wasted energy.
light energy from sun (wasted is heat) -> chemical potential energy from plant (wasted is heat) -> chemical potential energy from animal (wasted is heat) -> chemical potential energy from person (wasted is heat) -> kinetic energy from person (wasted is heat and sound)