Ch. 3 Energy

Front

What is energy?

Back

Energy is the ability to do work or cause change. It exists in various forms, such as kinetic, potential, thermal, and more.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object in motion. The faster an object moves, the more kinetic energy it has.

Front

What is potential energy?

Back

Potential energy is stored energy based on an object's position or state. For example, a stretched rubber band has potential energy.

Front

What is thermal energy?

Back

Thermal energy is the energy that comes from the temperature of matter. It is the total kinetic energy of particles in an object.

Front

What is electromagnetic energy?

Back

Electromagnetic energy is a form of energy that travels in waves and includes visible light, radio waves, and X-rays.

Front

How do large windows help keep homes warm?

Back

Large windows capture sunlight, which is a source of thermal energy, helping to warm the interior of the home.

Front

What happens to energy when a paper clip is heated and straightened?

Back

When a paper clip is heated and straightened, a physical change occurs, and the energy is transformed into thermal energy.

Front

What is the role of windmills in energy generation?

Back

Windmills convert kinetic energy from wind into mechanical energy, which can then be transformed into electrical energy.

Front

Why is consistent wind important for windmill farms?

Back

Consistent wind is important because it ensures a steady supply of kinetic energy to generate electricity efficiently.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form or appearance of a substance without changing its composition, while a chemical change results in the formation of new substances.