Leap Prep

Students are testing different materials to find the one that transfers the most heat energy. Identical containers, made of different materials, were filled with hot water, and the temperature of the water was measured and recorded over time. Based on the graph of the time and temperature data, which material was most effective at transferring thermal energy?

• Material 1

• Material 2

• Material 3

• Material 4

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-3

Which of the following can be concluded from the graph?

• Kinetic energy only changes when speed changes.

• Speed is only related to the size of an object.

• Kinetic energy increases as speed increases.

• All moving objects have the same kinetic energy.

Tags

NGSS.MS-PS3-1

Four cubes, of the same size, but made of different materials, were placed in a hot water bath at a temperature of 100°C. The temperature of each cube was monitored for 30 minutes and the results graphed as shown here. The cube made of which substance will take the longest to reach a temperature of 75°C ?

• Copper

• Steel

• Plastic

• Glass

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

At which point in the roller-coaster's journey along the track does it have the greatest potential energy?

• W

• X

• Y

• Z

Tags

NGSS.MS-PS3-2

At which position on the diagram would an apple have the greatest potential energy?

• Position 1

• Position 2

• Position 3

• Position 4

Tags

NGSS.MS-PS3-2

NGSS.MS-PS2-4

Students are exploring heat transfer. They fill a cup with hot water and place it on a counter in their classroom. They observe that the cup of hot water starts at a temperature of 80℃, and after an hour, the temperature drops to 27℃. As the cup of hot water sits on the table in the room and cools off, how does the thermal energy transfer? (Select the 3 answers that are true)

• Thermal energy will be transferred from the table to the cup.

• Thermal energy will be transferred from the hot water to the air around it.

• Thermal energy will be transferred from the cup to the hot water.

• Thermal energy will be transferred from the hot water to the cup.

• Thermal energy will be transferred from the cup to the table.

Tags

NGSS.MS-PS1-4

The passing of traits from parents to offspring is known as....

• hierarchy

• heredity

• traits

• genetics

Tags

NGSS.MS-LS3-2

Why might some plants have thorns?

• to stay safe from animals that want to eat the plant

• to attract insects that spread pollen to other plants

• to take in nutrients from the air

• to provide shade for the plant

What is the primary reason for the occurrence of leap years in the Gregorian calendar?

• To correct the Earth's axial tilt

• To synchronize with the lunar calendar

• To account for the Earth's orbit around the Sun

• To adjust for seasonal changes

Which of the following scientific principles explains why we have leap years?

• Newton's First Law of Motion

• The Law of Conservation of Energy

• Kepler's Laws of Planetary Motion

• The Theory of Relativity