Leap Science Review

Select 2

• All of the specimens are living because they are all part of the same ecosystem

• a microscope can be used to show how only living specimens contain cells

• only the living specimens can be seen using a microscope

• nonliving specimens will not show signs of growth over time

• nonliving specimens will only have one type of cell and living specimens will have many types of cells

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Box #1

• maximum potential energy

• increasing kinetic energy

• energy transfer

• no energy

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NGSS.MS-PS3-5

The engineers observed that the skateboard floats above the track because the magnets on the skateboard ______ the magnets on the track.

• attract

• repel

• make contact with

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When a rider steps onto the skateboard, the force between the skateboard and the track ____ .

• increases

• decreases

• stays the same

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If the magnets are removed from the skateboard, the height of the skateboard should ____.

• increases

• decreases

• stays the same

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Which claim about the mass of the different objects is best supported by the data in the table?

• Object 1 has the greatest mass because it is closest to the sun

• Object 2 has the greatest mass because its orbital period and distance from the sun are most similar

• Object 3 has the greatest mass because it has the largest surface gravity

• Object 5 has the greatest mass because it has the longest orbital period

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During a collision between a smaller space debris piece and the spacecraft wall, the force of the space debris piece _____ the force of the spacecraft wall.

• less than

• greater than

• equal to

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NGSS.MS-PS2-2

The force of the spacecraft wall is directed ____.

• up

• down

• toward the piece

• away from the piece

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Engineers can further reduce the force of incoming space debris on the spacecraft by slightly ___ the thickness of the aluminum layer.

• increasing

• decreasing

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

• To correct the drift between the calendar year and the solar year

• To account for the Earth's axial tilt

• To synchronize with the lunar calendar

• To adjust for the Earth's elliptical orbit