Energy

Examples of systems such as ecosystems and the atmosphere and solar system, where energy can be transferred into or out are called...

• open systems

• closed systems

• energy systems

• incomplete systems

Systems that do not interact with its surroundings and energy cannot get into or out of are called...

• open systems

• closed systems

• energy systems

• incomplete systems

Which law states that energy cannot be created or destroyed?

• law of conservation of time

• law of conservation of matter

• law of conservation of matter

• law of conservation of energy

What best describes energy?

• energy is the ability to do work

• energy exists in many forms

• energy can be changed from one form to another

• all of the above

What type of energy is transferred when a force acts between objects that push or pull on each other over a distance?

• thermal energy

• mechanical energy

• electrical energy

• chemical energy

What happens to the amount of mechanical energy when the strength of the forces or distance covered increases?

• the amount of energy decreases

• the amount of energy increases

• the amount of energy stays the same

What happens to the mechanical energy when objects no longer exert forces on each other, for example when all the dominoes in a line are knocked over?

• the energy disappears

• the energy multiplies

• the energy stops until the force is reintroduced

What type of energy are coal, oil and gas?

• mechanical

• chemical

• electrical

What type of energy involves pushing and pulling?

• mechanical

• sound

• thermal

What type of energy involves guitar, drum and vocal chords?

• electrical

• thermal

• sound