Chapter 8-9 Physical Science Review Sheet

Front

Anything people can use that comes from nature.

Back

Natural resources are materials or substances that occur in nature and can be used for economic gain or to fulfill human needs.

Front

What type of energy is released by the sun and other stars when their nuclei fuse?

Back

Nuclear energy is the energy released during nuclear fission or fusion, particularly in stars where hydrogen nuclei fuse to form helium.

Front

Transfer of thermal energy between particles of matter that are touching.

Back

Conduction is the process of heat transfer through direct contact between materials.

Front

When particles move more quickly, temperature is ___________________ and an object feels _____________________.

Back

Increased/warmer. As temperature rises, particles move faster, resulting in a warmer sensation.

Front

Which of the following is the formula for kinetic energy?

Back

KE = 1/2 mass x velocity squared. This formula calculates the energy of an object in motion.

Front

What is the definition of kinetic energy?

Back

Kinetic energy is the energy an object possesses due to its motion, depending on its mass and velocity.

Front

What is potential energy?

Back

Potential energy is the stored energy in an object due to its position or state, such as gravitational potential energy.

Front

What is the law of conservation of energy?

Back

The law of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.

Front

What is thermal energy?

Back

Thermal energy is the total kinetic energy of particles in a substance, related to temperature.

Front

What is the difference between renewable and non-renewable resources?

Back

Renewable resources can be replenished naturally over time (e.g., solar, wind), while non-renewable resources exist in finite amounts (e.g., fossil fuels).