CS2: Quarter 2 Pre/Practice Test

Front

What is the primary difference between the colors of visible light?

Back

The wavelength of each color.

Front

What happens when heat is transferred to a substance?

Back

The substance can change from a liquid to a gas.

Front

What energy transformation occurs in a toy drone powered by batteries?

Back

Chemical energy is transformed into electrical energy, and the electrical energy is transformed into mechanical energy.

Front

What happens when a hot spoon is placed in cold ice cream?

Back

The ice cream will melt because heat will flow from the spoon to the ice cream.

Front

What property is used to divide the colors in the spectrum of white light?

Back

Wavelength.

Front

Define wavelength in the context of light.

Back

Wavelength is the distance between successive peaks of a wave, determining the color of light.

Front

What is thermal energy?

Back

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

Front

Explain the process of melting.

Back

Melting is the transition from solid to liquid when a substance absorbs heat.

Front

What is the role of batteries in a toy drone?

Back

Batteries provide chemical energy that is converted into electrical energy for the motor.

Front

Describe the flow of heat between two objects at different temperatures.

Back

Heat flows from the hotter object to the cooler object until thermal equilibrium is reached.