Term 2 Flex Point Quiz MS Science 7/8

What are the 4 fundamental forces?

• centrifugal, centripetal, frictional, tensional
• thermal, kinetic, potential, mechanical
• magnetic, electric, weak force, strong force
• gravitational, electromagnetic, weak nuclear, and strong nuclear

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What are the charges on sub-atomic particles?

• Protons have a charge of -1, electrons have a charge of +1, and neutrons have no charge.
• Protons have a charge of +1, electrons have a charge of -1, and neutrons have no charge.
• Protons have a charge of 0, electrons have a charge of 0, and neutrons have a charge of 0.
• Protons have a charge of +1, electrons have a charge of +1, and neutrons have a charge of -1.

Hitting a ball with a bat is an example of which of Newton's Laws of Motion?

• Newton's First Law of Motion
• Newton's Second Law of Motion
• Newton's Law of Gravitation
• Newton's Third Law of Motion

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Thomas is pushing a shopping cart with a certain mass at an acceleration. According to Newton's second law of motion, what is the equation that relates the force Thomas applies, the mass of the cart, and the acceleration of the cart?

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The force that pulls objects toward the center of the Earth is called:

• Magnetic force

• Gravitational force

• Electric force

• Nuclear force

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What are the non-contact forces?

• Frictional force

• Nuclear force

• Centripetal force

• Gravitational force, magnetic force, and electrostatic force

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Which is the best example of Newton's First Law?

• An object in motion will change direction without any external force.
• An object in motion will slow down and stop on its own.
• An object in motion will continue in motion with the same speed and in the same direction unless acted upon by an external force.
• An object at rest will remain at rest unless acted upon by an external force.

An object with a mass of 1.5 kg is accelerating at 2.5 m/s². What force does it have?

• 3.75 N
• 1.25 N
• 4.50 N
• 5.25 N

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NGSS.MS-PS2-2

Two objects, with equal mass, are dropped from the same height on Earth, and at the same time. Setting air resistance aside, which will hit the ground first?

• Both objects will hit their respective surfaces at the same time.

• The object on the moon will never hit the surface

• The object on the Earth will hit first

• The object on the moon will hit first

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What two non-contact forces have both attraction and repulsion?

• Nuclear force and weak force
• Magnetic force and electric force
• Gravitational force and friction
• Centripetal force and centrifugal force

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NGSS.HS-PS2-4