Unit 5: Electric, Magnetic, and Gravitational forces

What forces works by combining electric and magnetic forces?

• Electric

• Magnet

• gravitational

• Electromagnetism

On the electromagnetic spectrum: What has the highest frequency and energy?

• radio waves

• gamma rays

• microwaves

• infrared waves

• X-rays

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On the electromagnetic spectrum: What has the lowest frequency and energy?

• radio waves

• gamma rays

• microwaves

• infrared waves

• X-rays

Tags

NGSS.MS-PS4-1

Which electromagnetic wave was used to produce the image?

• radio waves

• gamma rays

• microwaves

• infrared waves

• X-rays

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Earth's gravity pulls objects toward the___

• Center of the sun

• Center of the moon

• Center of the Earth

• Center of the Solar System

What factors affect the strength of the gravitational force between objects?

• mass

• distance

• weight

• both mass and distance

Tags

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Answer the question using the image. The force of gravity is strongest between the objects in row____.

• Row A & B because they are both the same distance

• Row A & B because they both have objects of equal masses

• Row A because they have the same mass

• Row B because one of the objects has a greater mass than the other which forms a greater gravitational pull

Tags

NGSS.MS-PS2-4

Answer the question using the image. The force of gravity is weakest between the objects in row____.

• Row C because they are closer together

• Row C because they have the same mass

• Row D because they are farther apart

• Row D because they have equal masses

• As the orbital period gets longer, the gravitational pull gets stronger

• As the mass of the objects decrease, the gravitational pull gets stronger

• As the mass of the objects increase, the gravitational pull gets stronger

• As the distance between the objects increases, the gravitational pull gets stronger

Tags

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Scientists suggest that the movement of Earth’s liquid iron core results in electrical currents. These currents would then result in Earth’s magnetic field. Recent satellite data suggest that the strength of Earth’s magnetic field has weakened by about 3.5 percent in some areas. In other areas, Earth’s magnetic field strength has increased by about 2 percent.

Which statement best explains the differences in Earth’s magnetic field strength based on the movement of Earth’s liquid iron core?

• The movement of Earth's liquid iron core stopped in both locations

• The movement of Earth's liquid iron core changes direction in some locations

• The movement of Earth's liquid iron core is the same in all locations

• The movement of Earth's liquid iron core increased in speed in both locations

Tags

NGSS.HS-PS2-5

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