Magnetism and Gravitational Forces 3

Which image correctly shows how a needle and magnet should interact to magnetize the needle?

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

A student wants to build a simple compass that shows the magnetism of Earth. Which of the following would be the best way to build a compass?

• placing a large magnet on a plank of wood

• placing a small bar magnet on a level surface

• placing a magnetized rock in a bucket of salt water

• placing a magnetized needle on a leaf floating in water

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

• Derrick made a bar magnet, and it created a gravitational field that attracted the screw.

• Derrick made a bar magnet, and it created a magnetic field that repelled the screw.

• Derrick made an electromagnet, and it created a magnetic field that attracted the screw.

• Derrick made an electromagnet, and it created a gravitational field that repelled the screw.

Tags

NGSS.MS-PS2-3

Which drawing below represents the electric field surrounding two objects that have equal magnitude charges of opposite polarity?

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Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which drawing below represents the electric field surrounding two objects that have equal magnitude charges of the same polarity?

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Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which of the four fundamental forces has the largest effect on objects' astronomical distances from each other?

• strong nuclear force

• weak nuclear force

• electromagnetic force

• gravitational force

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

When an astronaut is on a spacewalk and is moving away from the space shuttle, how is the force of gravity between the two objects affected?

• it increases

• it decreases

• it increases for the astronaut and decreases for the space shuttle

• it decreases for the astronaut and increases for the space shuttle

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5

Which of the following is true about gravitational forces?

• Gravitational forces are larger between objects that have small masses.

• Gravitational forces are smaller between objects that have large masses.

• Gravitational forces decrease as the distance between two objects decreases.

• Gravitational forces increase as the distance between two objects decreases.

Tags

NGSS.MS-PS2-4

If two charges attract to each other, then which of the following is true?

• Both charges must be positive.

• Both charges must be negative.

• Both charges must be different.

• Both charges must be equal in value.

Tags

NGSS.MS-PS2-3

• when the moon appears full in the night sky

• when North America faces the moon in the night sky

• when Earth and the moon are the farthest apart from each other

• when Earth and the moon are the closest to one another

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4