Unit 1 Part 1 Review

Alex placed a small beaker of cold water on a hot plate and heated it for 10 minutes. He took the temperature of the water several times during those 10 minutes and recorded his data. Alex claims that the graph below shows the relationship between temperature and time when water is heated.Which statement best explains why the temperature leveled off in section 2 of the graph?

• Alex turned off the hot plate so the water did not get any warmer.
• The water reached the boiling point, so the temperature no longer increased.
• An experimental error caused the graph to level off, because the water temperature should keep increasing over time.
• Cold water heats faster than warm water, so once the cold water was room temperature, it took more than 10 minutes to make it hot.

Tags

NGSS.MS-PS1-4

Common kitchen appliances include electric stoves, toasters and blenders. Each appliance uses an energy source and involves energy changes to prepare food.An open pot of water is heated on the stove. As water boils, the molecules

• move slower and closer together
• move faster and farther apart.
• get larger
• get smaller

Tags

NGSS.MS-PS1-4

When the temperature of a sample of water is -5⁰C, the water is 

• a gas
• a liquid
• a solid
• a vapor

Tags

NGSS.MS-PS1-4

Delilah put a container of water in the freezer and left it there overnight. The next morning she saw that the water in the container had changed to ice.Which of the following statements best explains why the water changed to ice?

• The water gained energy.
• The water absorbed light.
• Mass was released from the water.
• Heat was taken away from the water.

Tags

NGSS.MS-PS1-4

A pond is pictured below in two different seasons.Which of the following has caused the changes in the pond from A to B?

• The pond water has lost heat energy.
• The pond water temperature has increased.
• Warm water has risen to the top of the pond.
• All of the water has evaporated from thepond.
  

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

As heat is slowly added to a glass of ice water, the temperature remains at 0⁰C. Which of the following statements explains why the temperature of the mixture of ice and water remains constant as heat is added?

• Heat is stored in the solid ice.
• Heat is stored in the liquid water.
• Heat is used to turn the solid ice into liquid water.
  
• Heat is absorbed equally by the solid ice and the liquid water.
  

Tags

NGSS.MS-PS1-4

Which of the following statements best describes what happens to water during evaporation?

• The temperature of the water increases until the water molecules react with nitrogen in the air.
  
• Water molecules on the surface overcome intermolecular forces and change into the gas phase.
  
• Water molecules on the surface come in contact with air molecules and are pulled into the gas phase.
• The temperature of the water increases until the water molecules separate and form oxygen and hydrogen gas.

Tags

NGSS.MS-PS1-4

A group of students conducted an investigation. They placed 10 grams of ice at −5⁰C and a thermometer into a beaker. The students then placed the beaker on an electric hot plate and heated the beaker of ice for 10 minutes. The students read the thermometer every minute, recorded the temperature, and then constructed the graph below.
Adding heat energy to the water in this investigation caused a

• physical change from a solid to a liquid
• physical change from a liquid to a solid
• chemical change from a solid to a liquid
• chemical change from a liquid to a solid

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS1-2

The graph shows the temperature changes as a sample of ice is heated.What is happening during time 1?

• The liquid is evaporating.
• The liquid is freezing.
• The solid is freezing.
• The solid is melting.

Tags

NGSS.HS-PS3-1

A solid substance is heated at a uniform rate. This graph shows how the temperature of the substance changes as heat is added. According to the energy diagram shown, the substance will boil at what temperature?

• -60⁰C
• -10⁰C
• 90⁰C
• 140⁰C

Tags

NGSS.HS-PS3-4