Matter & Energy Mid-Unit Review

A jar of water is placed over a flame and the flame warms the water at the bottom of the jar.

• The water at the bottom of the jar will get warmer and warmer, but it will not rise until it starts to boil.

• The water at the bottom of the jar will get warmer, but it will not rise.

• As the water at the bottom of the jar becomes a little warmer than the water around it, the warmer water will start to rise.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Convection currents are one way that thermal energy can be transferred. In which of the following can a convection current occur?

• In gases but not in liquids or solids

• In liquids but not in solids or gases

• In liquids and gases but not in solids

Tags

NGSS.MS-PS1-4

A teacher opens a window in her classroom, letting in air that is colder than the air inside the classroom.

What will happen to the colder air when it comes into contact with the warmer air in the classroom?

• The cold air will stay at the same height as the window, neither rising nor sinking.

• The cold air will sink toward the floor.

• The cold air will sink if it is much colder than the air around it; but if it is only a little colder than the air around it the cold air will not sink.

Tags

NGSS.MS-ESS2-5

Which of these items is NOT and insulator?

• A cardboard coffee cup sleeve

• An oven mitt

• A plastic cup

• A pan

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

What happens to a substance when it reaches the freezing point?

• The substance changes from a solid to a liquid.

• The substance changes from a liquid to a solid.

• The substance changes from a solid to a gas.

• The substance changes from a gas to a solid.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Mike was sitting in a chair about 10 feet from his fireplace at home and felt the heat from the fire. Which type of heat transfer is involved in Mike feeling the heat while sitting in front of the fireplace?

• absorption

• conduction

• convection

• radiation

Sean cooks soup in a large pot. He leaves the bottom half of a ladle (large soup spoon) in the soup for 5-10 minutes. After some time, Sean notices the top half of the ladle has become warm.

What mode of heat transfer made the top half of the ladle warm?

• conduction

• convection

• emission

• radiation

Emily is heating water in her science lab as shown in the diagram.

What is the main method of heat transfer occurring within the water?

• absorption

• conduction

• convection

• radiation

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

Which statement describes the shape of a solid?

• It has its own shape.

• It does not have a shape.

• It takes the shape of its container.

• It changes shape with temperature.

What is matter? Choose all that are true.

• anything that doesn't take up space

• anything that has particles

• a solid, liquid, and gas

• heat and electricity

• anything that takes up space