Leap 2025 Science

Scientist are planning an investigation to collect evidence to help predict future magnetic pole reversals of Earth's magnetic field. Using information from figure 3, describe how scientists can collect data on changes in Earth's magnetic poles and explain how the data can be used to predict future magnetic pole reversals.

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NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

Based on the information in the model, which statement best explains how DDT was introduced into eagle populations?

• The eagles absorbed the DDT directly from the air

• The eagles absorbed the DDT directly from the water

• The eagles absorbed the DDT after eating large fish

• The eagles absorbed the DDT after eating zooplankton

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NGSS.MS-LS2-4

What evidence from the graph best shows how the availability of corn likely affected the farming of domesticated turkeys in figure 1?

• An increase in corn production during the Great Drought increased the domestic turkey population.

• An increase in corn production during the Great Drought decreased the domestic turkey population.

• A decrease in corn production during the Great Drought decreased the domestic turkey population

• A decrease in corn production during the Great Drought increased the domestic turkey population.

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which statement about the forces acting on the balancing rock best explains the stability of the rock over time?

• No forces are acting on the rock

• the sum of the forces acting on the rock is zero

• the force of gravity is not acting on the rock

• the force of gravity is the only force acting on the rock

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NGSS.MS-PS2-2

NGSS.MS-PS2-4

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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NGSS.MS-LS1-1

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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NGSS.MS-PS2-5

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

• increases

• decreases

• stays the same

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

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

• increases

• decreases

• stays the same

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NGSS.MS-PS2-2

Which property of the objects in the model has a larger effect on the motion of moon 1?

• the orbital paths of planet 1 and planet 3

• the rotational speed of moon 2

• the force of gravity from planet 2

• the force of gravity from planet 3

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NGSS.MS-ESS1-2

NGSS.MS-PS2-4

NGSS.MS-PS2-5

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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NGSS.MS-ESS1-2

NGSS.MS-ESS1-3