8th 2.1

The gravitational attraction between two objects depends on the distance between the objects and their _____.

• magnetic attraction
• masses
• momentum
• volumes

Tags

NGSS.MS-PS2-4

Jupiter is much more massive than Earth. What would happen to an astronaut on Jupiter?

• The astronaut would weigh the same on Jupiter as on Earth.
• The astronaut would weigh a little less on Jupiter than on Earth.
• The astronaut would weigh more on Jupiter than on Earth.
• The astronaut would have no weight at all on Jupiter.

Tags

NGSS.MS-PS2-4

When you walk across a rug on a cold dry winter day you might touch a doorknob and get a shock. What causes this shock?

• electrons moving from the rug to the wooden door

• electrons moving from the air to your hand

• electrons moving from your hand to the doorknob

• electrons moving from your hand to the rug

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

A coil of wire with an electric current passing through it has what effect on a magnet?

• The magnet is not affected by the current.
• The positive pole of the magnet is attracted to the electric current.
• The magnet loses its magnetism.
• The magnet reverses its polarity.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which of these statements describes how an electric motor works?

• Electricity creates a magnet that causes other parts of the motor to move.
• A permanent magnet is turned into an electromagnet using electricity.
• Electricity is used to move a turbine.
• Moving turbines cause magnets to move, producing electricity.

Tags

NGSS.MS-PS2-3

What is potential energy?

• energy from the sun
• energy of motion
• energy of position
• energy from chemicals

Tags

NGSS.MS-PS3-2

In an electric generator, ______ will increase the output of electricity

• decreasing the turns of wire

• increasing the turns of wire

• decreasing the size of the magnet

• decreasing the speed of the spinning magnet

Tags

NGSS.MS-PS2-5

NGSS.MS-PS3-5

What will happen if an object with a positive charge is pushed toward another object with a negative charge?

• They will repel each other.
• Thunder will occur.
• They will attract each other.
• They will produce smoke.

Tags

NGSS.MS-PS2-3

When the Apollo astronauts went to the moon, they weighed about one-sixth of what they weighed on Earth because ________.

• they lost a lot of weight during their journey to the mooon

• they were much farther from Earth

• the moon's mass is less than the Earth's mass

• the moon's mass is greater than the Erath's mass

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

What will happen if two negatively charged objects are pushed toward each other?

• They will attract each other
• They will repel each other
• They will create a static charge.
• They will create a spark.

Tags

NGSS.MS-PS2-3