Energy Flashcards
What are the two major forms of energy?
Kinetic and potential energy.
What is potential energy?
Elastic potential energy is when an object has stored energy that can be released to create movement.
What is involved in nuclear energy?
Nuclear energy involves the splitting and joining of atoms.
What is light energy?
Light energy is energy. It comes from sources such as light globes, the sun, and fires.
What is a power source?
A battery or a power point in the wall (wall socket). It is the source of electrical potential energy.
What is heat energy
Heat energy ( also known as thermal energy) is made from friction such as rubbing your hands together. It is can also be generated from chemical reactions
What is nonrenewable energy?
Nonrenewable energy uses up resources that we cannot recreate. Some examples of this are gas to run our car and coal burned in power plants. Once they are used, they are gone forever.
What is renewable energy?
A renewable energy source is one that can be replenished. Examples of this include hydropower from turbines in a dam, wind power from windmills, and solar power from the sun.
What are wires usually made of?
Copper wire surrounded by a plastic coating.
What is a switch and what does it do?
A switch opens and closes the circuit. It breaks the conductive path when switched OFF and makes an electric circuit when switched ON.
Which of the following statements is the most accurate?
- Like charges will attract each other.
- Unlike charges repel.
- Charged objects will attract uncharged objects.
- Opposite charges will repel.
Charged objects will attract uncharged objects.
What type of energy does a trampoline use?
Potential kinetic energy.
Fill in the gap
Headphones convert _________ energy into sound energy
Electrical
Fill in the gap
A light bulb converts _________ energy into light energy
Electrical
Fill in the gap
A solar panel converts light energy into _________ energy
Electrical
What is kinetic energy?
Kinetic energy is the energy of movement
What is energy efficiency?
Energy efficiency is a measure of how much energy is transformed into the desired type, compared with the amount that might be by-product and lost as heat, sound or another type of energy.
Why is energy efficiency an important thing to consider?
Energy efficiency is an important thing to consider because when your using a higher star rated appliance you know less energy is being wasted.
Fill in the gap
Energy cannot be created nor destroyed it can only be _____.
Which law is this?
transferred. This is the 1st Law of Thermodynamics
What are the 3 components used to make a simple circuit?
Wires, power source and a resistor (light bulb).
What does an ammeter measure?
An ammeter measures currents.
What is a insulator?
A conductor is a material which does not easily pass electricity. Eg, plastic, wood, glass, ect.
What is a conductor?
An conductor is a material which easily allows electricity to pass through. Eg, copper, iron, ect.
Fill in the gaps
Electrons and protons ______ each other.
Attract
What is a current?
A flow of electricity which results from the ordered directional movement of electrically charged particles.
What is biofuel?
Biofuels can be used to create energy by buring or eating them.
What is static electricity?
The imbalance of positive and negetive charges.
What is the difference between a series circuit and a parallel circuit?
The most noticeable difference between a parallel circuit and a series circuit is that the series circuit’s power runs along one line, to both the resistors. Whilst in the parrellel circuit, each resistor is attached to the power source.
What is electricity?
A form of energy which is made up of charges that can produce light, heat or sound.
True or false?
Neutrons are negetively charged.
False. They are neutral.
True or false?
Protons are positively charged?
True
True or false?
Electrons are negetively charged.
True
