Air Conditioner Pre-test

First and Last Name

Choose your Section Number

• 610
• 609
• 608
• 607
• 606

1. The table above shows different items that are found sitting on the counter in a kitchen. The temperature of the kitchen is 72 degrees Fahrenheit. Classify the objects according to whether their molecules will speed up or slow down after being left in the kitchen for a period of time. List each object under the appropriate category. Categories -Molecules will speed up -Molecules will slow down

2. The picture above shows the moving molecules in a beaker containing a liquid. What will happen if the molecules increase their speed?

• A. The molecules will gain mass.
• B. The liquid will change to a solid
• C. The temperature of the liquid will increase.
• D. The temperature of the liquid will decrease.

3 Part A. Read the passage below. Select the right option to complete the passage. Bre lives in New York City. At school, she is learning about the states of matter and movement of the molecules. For her class, she is asked to take pictures of people around the city and tell whether they are behaving like the molecules in a solid, liquid or gas. Bre took her camera all over town. She first rode the subway. The people around her were standing very close together. Bre took a picture of everyone acting like a ____1___. She then arrived at an ice skating rink. People skated around one another, just like a ___2____ they did not leave the ice skating rink. All Bre needed was people acting like a gas. She decided to go to a big open park to take her last picture. Bre got an ‘A’ on her test. Check the correct response for each Blank 1.

• Soild
• Gas
• Liquid

3 Part B. Read the passage below. Select the right option to complete the passage. Bre lives in New York City. At school, she is learning about the states of matter and movement of the molecules. For her class, she is asked to take pictures of people around the city and tell whether they are behaving like the molecules in a solid, liquid or gas. Bre took her camera all over town. She first rode the subway. The people around her were standing very close together. Bre took a picture of everyone acting like a ____1___. She then arrived at an ice skating rink. People skated around one another, just like a ___2____ they did not leave the ice skating rink. All Bre needed was people acting like a gas. She decided to go to a big open park to take her last picture. Bre got an ‘A’ on her test. Check the correct response for each Blank 2.

• Soild
• Gas
• Liquid

4. If a gas is compressed and heated, the pressure increases. This is due to

• A. gas molecules condensing
• B. gas molecules evaporating
• C. more molecules of gas being produced
• D. gas molecules striking the walls of the container

5. When molecules in a substance vibrate faster and faster, what happens to the temperature of the substance?

• A. It gets colder.
• B. It gets warmer.
• C. It stays the same.
• D. It depends on the change in speed of the vibrations.

6. What happens when an ice cube melts in a glass of water?

• A. No energy is transferred.
• B. The water warms up due to heat transfer.
• C. Heat travels from the ice to the warmer water.
• D. Heat is transferred from the warmer water to the ice cubes.

7. As a liquid changes to a solid, this change in state is called________.

• A. freezing
• B. melting
• C. sublimation
• D. condensation