Section 1 and 2 Summative Assignment: Heat and Heat Transfer 1. What happens to Brownian motion when you increase the temperature of the water?
A. Brownian motion decreases
B. Brownian motion increases
C. Brownian motion stops
D. Brownian motion cannot be observed

2. What collides with pollen grains to cause the zigzag action of Brownian motion?
A. electrons
B. heat
C. protons
D. molecules

3. What is the cause of heat when two pieces of wood are rubbed together?
A. water
B. friction
C. radiation
D. caloric

4. Which of the following is a step required to complete the experiment on Brownian Motion (as you watch from the Crazy russian scientist hacker)
A. Pour 200 mL of cold water into a beaker or glass.
B. pour 200 ml of hot water into a beaker or glass
C. pour equal amounts of food coloring into both beakers
D. all of the above were observed

5. Which reason explains why the food colouring spreads out faster in hot water than in cold water?
A. Hot water is thinner than cold water, so the food colouring can move more easily in it.
B. The molecules of water in hot water are moving more slowly, allowing the food colouring to pass by.
C. The molecules of water in hot water are moving faster than those in cold water, colliding more often and harder with the food colouring.
D. The food colouring becomes thinner due to the heat from the hot water and, therefore, can move more easily.

6. Thermal energy (heat) is defined as
A. the sum of all the kinetic energies of all the particles in an object
B. the average of all the kinetic energies of all the particles in an object
C. the sum of all the numbers of particles in an object
D. the average number of particles in an object
7. Kinetic energy is defined as

A. a measure of the mass of an object
B. a measure of the amount of motion particles have
C. a measure of the distance between particles in an object
D. a measure of the number of particles in an object

8. Temperature is defined as
A. the average number of particles in an object
B. the average of the masses of the particles in an object
C. the average of the kinetic energies of all the particles in an object
D. the sum of all the kinetic energies of all the particles in an object