6th Grade Science Unit 2- Energy

A student places a drop of purple food coloring into one beaker of water at 20°C and another drop into another beaker of water at 50°C. The temperature of the food coloring is 19°C. The picture shows what he observes. What explains what the student observes in this investigation? Select all that apply.

• The food coloring is denser than the cold water.

• The food coloring moves slower in hot water.

• The food coloring is less dense than the cold water.

• The food coloring separates into two different colors.

• The food coloring moves faster in hot water.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

A student with a body temperature of 37°C holds a can of cold soda with a temperature of 18°C. The student is in a room with an air temperature of 22°C. Which statement best describes the flow of heat throughout the entire system?

• Heat will flow from the air to the can and the student.

• Heat will flow from the student to the can and the air, and from the air to the can.

• Heat will flow from the student to the can.

• Heat will flow from the student to the can and the air to the can.

Carlos made a mistake on his list comparing conduction, convection, and radiation. Which mistake did he make?

• Radiation can also travel through matter.

• The rate of conduction is only dependent on time.

• Currents in the ocean are an example of radiation.

• Convection is also caused by electromagnetic waves.

Tags

NGSS.MS-PS3-3

Evan uses a thermometer to measure the temperature of the water over time. The chart shows his temperature recordings and his observations. Evan forgot to take the temperature at 15 minutes. At 15 minutes, the temperature of the water is most likely

• 0°C.

• 10°C.

• 13°C.

• 15°C.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What should Evan most likely do to make the water temperature decrease to below 0°C?

• Evan should add twice as much ice so more heat energy is transferred from the water to the ice.

• Evan should add twice as much ice so more cold energy can be transferred from the ice to the water.

• Evan should put the bin in an area that is lower than 0°C, so all of the heat energy from the water can be transferred to the surrounding air.

• Evan should put the bin in an area that is lower than 0°C, so all of the cold energy from the surrounding air can be transferred to the water.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-3

NGSS.MS-PS3-5

He takes the temperature of the beaker and the container over a period of 20 minutes. Which data table did Carl most likely write to record his results?

• A. Time in Minutes: 0, 5, 10, 15, 20 Temperature of the Beaker (°C): 6, 8, 10, 12, 14 Temperature of the Container (°C): 27, 29, 30, 32, 34

• B. Time in Minutes: 0, 5, 10, 15, 20 Temperature of the Beaker (°C): 6, 4, 2, 0, -2 Temperature of the Container (°C): 27, 25, 23, 20, 18

• C. Time in Minutes: 0, 5, 10, 15, 20 Temperature of the Beaker (°C): 6, 4, 2, 0, -2 Temperature of the Container (°C): 27, 29, 30, 32, 34

• D. Time in Minutes: 0, 5, 10, 15, 20 Temperature of the Beaker: 6, 8, 10, 12, 14 Temperature of the Container: 27, 25, 23, 20, 18

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

A student conducts an experiment using a metal ball and ring attached to a stand. The metal ball moves through the ring at room temperature. The student then heats the ball on a burner and tries to pass it through the ring again. Which BEST explains why the metal ball cannot pass through the ring after being heated?

• The ball expands and becomes larger in size.

• The ring expands and becomes larger in size.

• The ball contracts and becomes smaller in size.

• The ring contracts and becomes smaller in size.

Tags

NGSS.MS-PS1-4

Four different colored pieces of fabric were placed under direct light. After five minutes the temperature for each piece of fabric was measured. The table below shows results from the experiment. Why did Fabric X experience the greatest temperature increase?

• because it scattered the most heat energy

• because it refracted the most heat energy

• because it reflected the most heat energy

• because it absorbed the most heat energy

Tags

NGSS.MS-PS1-4

The image shows a thermometer measuring the temperature at 35°C and –20°C. Which BEST describes why the liquid in the thermometer falls when the temperature decreases?

• the liquid inside the thermometer solidifies

• the liquid inside the thermometer expands

• the liquid inside the thermometer contracts

• the liquid inside the thermometer evaporates

Tags

NGSS.MS-PS1-4

Railroad tracks have narrow gaps between them at regular intervals. What is the MOST LIKELY purpose of the narrow gaps?

• The gaps reduce dirt buildup on the tracks.

• The gaps prevent trains from coming off the tracks.

• The gaps prevent the tracks from breaking during temperature changes.

• The gaps reduce the noise pollution caused when trains move over the tracks.

Tags

NGSS.MS-ETS1-1