Demonstration of Learning - Grade 7 Science

A student notices that on a sunny day, dark-colored cars in the parking lot feel hotter than light-colored cars. Which statement best explains why dark-colored cars typically get hotter than light-colored cars in sunlight?

• Dark colors conduct heat more efficiently.

• Dark colors create stronger convection currents.

• Dark colors absorb more heat energy.

• Dark colors reduce heat loss through reflection.

Arthur is investigating how energy is transferred when his bowl of soup cools down.

He measures the temperature of the soup near the surface and also at the bottom of

the bowl, as shown in the image.

Over the course of the 5 minutes, the soup near the ________ lost more thermal energy. The particles of soup near the surface have ________ kinetic energy than the particles at the bottom.

• surface; less

• bottom; more

• surface; more

• bottom; less

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

If thermal energy transfers from the bottom of the soup towards the surface, it is transferred through the process of (a)   .

• conduction
• convection

Tags

NGSS.MS-PS1-4

During a flight why might passengers feel colder near the airplane windows compared to the middle of the cabin during flight?

• Radiation from the sun warms the center of the cabin more effectively.

• Cold air entering through the door creates drafts.

• The windows, being cooler due to external temperatures, conduct heat away from passengers.

• Convection currents are stronger in the center of the cabin.

Tags

NGSS.MS-PS1-4

An astronaut on a spacewalk is exposed to both the cold of space and the intense sunlight. Which model would best describe the astronaut's thermal energy exchange?

• A. A model emphasizing conduction as the astronaut's suit transmits heat to the cold vacuum.

• B. A model showcasing convection as the astronaut's movement creates currents in the vacuum.

• C. A model illustrating radiation, where the sun's energy heats the suit while heat escapes into space.

• D. A combined model where conduction is the primary method of heat transfer, while radiation and convection play minimal roles.

Tags

NGSS.HS-PS4-3

Read the scenario and look at the model below to answer Part A and B for question #5. A group of students is trying to determine how different materials absorb and release thermal energy. They conduct an experiment in which they place different room-temperature substances into separate beakers containing 100 g of water at 90 °C, and measure how much the temperature of the water changes every minute for 4 minutes. The data table below summarizes their results.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Read the scenario and look at the model below to answer Part A and B.

A group of students is trying to determine how different materials absorb and release thermal energy. They conduct an experiment in which they place different room-temperature substances into separate beakers containing 100 g of water at 90 °C, and measure how much the temperature of the water changes every minute for 4 minutes. The data table below summarizes their results.

Which substance absorbed the most thermal energy from the water over the course of the experiment?

• rock

• metal

• plastic

• both the rock and plastic

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which substance absorbed the most thermal energy from the water based on the data provided?

• Substance A

• Substance B

• Substance C

• Substance D

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4