Gravity, Electricity and Magnetism

Lightning is an example of objects, clouds, becoming electrically charged due to induction. When the negative charges in the cloud jump to an object containing the opposite charge, we call the sudden flow of electrons ______________

• electric generator

• sonic boom

• static discharge

• static friction

Two negatively charged particles are 1 millimeter apart. The electric force between them is 20 Newtons. How will the amount of electric force between the particles change if the particles move closer together

• force will increase

• force will decrease

• force will stay the same

• force will disappear

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

If you cut a magnet in half you will have

• Two magnets, one with a north pole only and one with a south pole only

• One half will be a magnet and the other will no longer be a magnet

• Two magnets, each with a north pole and a south pole

• Two pieces but neither will be magnets anymore

An inflated balloon which has been rubbed against a person's hair is touched to a neutral wall and remains attracted to it. Which diagram best represents the charge distribution on the balloon and wall?

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Tags

NGSS.MS-PS2-3

Which of the following statements about gravitational fields is true?

• Gravitational fields affect objects only when two objects are touching.

• Gravitational fields affect objects only if the objects are not in contact.

• Any object that has mass is surrounded by a gravitational field: including a speck of dust, a human body, a paperclip, AND planets.

• Only very massive objects, such as Earth, are surrounded by a gravitational field.

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5

If two objects move away from each other. What happens to the gravitational attraction between them?

• it decreases

• it increases

• it becomes equal to zero

• it does not change

Which diagram best represents the gravitational field lines surrounding the Earth

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Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-5

A student claims that the gravitational force between two objects depends upon the mass of the objects and the distance between them. Which argument best supports the student's claim?

• If the distance between two objects increases, the gravitational force between the objects will decrease.

• If the distance between two objects decreases, the gravitational force between the objects will disappear.

• If the distance between two objects increases, the gravitational force between the objects will increase.

• If the distance between two objects decreases, the gravitational force between the objects will not change.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

Which of the following might make the spoons repel each other?

• Neither A nor B is electrically charged.

• Both A and B are negatively charged.

• A is positively charged, and B is negatively charged

• A is negatively charged, and B is not electrically charged.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What is the force that causes objects to fall towards the Earth?

• Magnetism

• Electricity

• Gravity

• Friction

Tags

NGSS.MS-PS2-4