Factors that influence the strength of gravity between two objects are their mass and their _______ apart.

• Newton

• Distance

• Gravity

• Freefall

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The SI unit for measure of weight is the _______.

• Newton

• Distance

• Gravity

• Mass

_______ is the measure of the force of gravity pulling on an object.

• Weight

• Mass

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Gravity has traditionally been defined as a force of attraction between things that have ______.

• Weight

• Mass

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Objects moving in one direction are affected by _______, accelerated by gravity.

• newton

• distance

• freefall

• mass

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NGSS.MS-PS2-4

Which of the following choices causes the atmosphere to be held in place around Earth?

• Speed

• Gravity

• Work

• Balance

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In an investigation, Ross drops a basketball from a ladder and watches it fall to the ground. What is the force that pulls the basketball to the ground?

• Acceleration

• Distance

• Gravity

• Mass

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NGSS.MS-PS2-4

London is conducting an experiment to see how far a marble will roll when she releases it at the top of an inclined plane. Why does the marble speed up as it travels down the inclined plane?

• The marble has a greater mass as it travels faster.

• The marble has less magnetic attraction to the inclined plane as it travels.

• The force of gravity pulls the marble down the inclined plane.

• The force of friction is reduced because the marbles surface is smooth.

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Which sentences is not a true description of the effect of Earth’s gravity on objects?

• Only objects that touch Earth are affected by Earth’s gravity.

• Only objects with mass are affected by Earth’s gravity.

• The farther away objects are from earth, the less affected they are by Earth’s gravity.

• The closer objects are to Earth, the more affected they are by Earth’s gravity.

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Why does the Moon orbit Earth?

• There is a chemical attraction between the Earth and the Moon.

• There is a gravitation attraction between the Earth and the Moon.

• There is a magnetic attraction between the Earth and the Moon.

• There is mechanical attraction between the Earth and the Moon.

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