G6 General Science Final Revision

What is the primary reason food coloring spreads out in still water?

• Gravity

• Wind

• Random motion and collisions of water particles

• Evaporation

What is diffusion?

• The process of particles sinking to the bottom of a container

• The movement of particles from an area of higher concentration to an area of lower concentration

• The increase in particle size over time

• The process of particles sticking together

As the kinetic energy of the particles increased, the ................ of the particles .................

• speed; decreased

• speed: increased

• space; decreased

• space; increased

In the context of diffusion, what happens when the concentration of particles is the same throughout the container?

• Diffusion stops

• Diffusion speeds up

• Particles settle at the bottom

• Particles evaporate

The energy of MOTION is called _______ energy.

• thermal

• kinetic

• potenial

• motion

Temperature is a measure of _____________.

• average kinetic energy

• average potential energy

• the sum of kinetic & potential energy

• the difference of kinetic & potential energy

As temperature increases, kinetic energy ________.

• stays the same

• increases

• decreases

What is thermal expansion?

• The decrease in volume when particles move faster

• The increase in volume when particle motion increases

• The increase in temperature when particles slow down

• The decrease in kinetic energy when particles move closer together

What happens to a substance when its particles lose kinetic energy?

• The particles move faster and spread out

• The particles slow down and move closer together

• The substance changes into a gas

• The temperature increases

What is thermal contraction?

• The increase in kinetic energy causing particles to spread out

• The decrease in volume when particle speed decreases

• The change of a liquid into a gas

• The increase in temperature when particles move faster