NGSS.MS-ESS1-2

Tides are caused by ___________

• wind
• gravitational pull of moon
• waves gravitation toward land
• rain

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NGSS.MS-ESS1-2

______ is a force that causes dust particles to stick together in a nebula.

• nuclear fusion
• gravity
• hydrogen
• friction

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NGSS.MS-ESS1-2

What is the Milky Way?

• a candy bar

• a star

• a solar system

• a galaxy

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NGSS.MS-ESS1-2

How did the apollo missions reach the moon?

• The apollo drifted towards the moon slowly

• The apollo orbited the Earth and used the force of gravity to accelerate towards the moon

• It had solar panels to generate electrical engines.

• The moons gravity pulled the apollo towards it.

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The gravitational pull on the Earth by the moon affects which of the following?

• The tilted axis

• Ocean tides

• Seasons

• The equator

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the orbit of one object around another object

• circling

• spinning

• rotation

• revolution

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How do scientists believe gravity influenced the formation of the planets in our solar system?

• A large cloud of gas and dust ignited into a planet.

• Gravity pulled the planets out of the Sun.

• A large explosion created the planets.

• Large pieces of debris clumped together to form planets.

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If the distance between Mercury and the Sun were increased, what could be done to maintain the same gravitational force of attraction between Mercury and the Sun?

• Decrease the masses of Mercury and the Sun

• Decrease Mercury's speed of orbit around the Sun

• Increase the masses of Mercury and the Sun

• Increase Mercury's speed of orbit around the Sun

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The path that planets take as they orbit the center of the solar system is a result of the interaction of what two things?

• The forward motion of the planet and gravitational pull of the Sun.

• The mass of the planet and the composition of its atmosphere.

• The magnetic field generated by the planet and friction with the air.

• The age of the solar system and the radioactive decay of elements.

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Galaxies are star systems made of millions or billions of stars, dust, gases and many other celestial bodies. Which of the following holds a galaxy together?

• Magnetic Forces

• Gravity

• Electromagnetic Radiation

• Thermonuclear Energy

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