Zack places iron filings on a piece of paper near a bar magnet. The iron filings quickly move and form a pattern around the magnet. Which argument does this evidence BEST support?(1 point)

Question

Responses

Big magnets can attract more objects.

Magnetic fields exist between objects that are not directly touching each other.
Magnetic fields exist between objects that are not directly touching each other.

Only materials that are made of metal have a magnetic force.
Only materials that are made of metal have a magnetic force.

A magnet can attract all objects through different materials.

Answer 1

The evidence provided by Zack's experiment with iron filings around a bar magnet BEST supports the argument:

Magnetic fields exist between objects that are not directly touching each other.

This is because the iron filings align according to the magnetic field created by the bar magnet, demonstrating that magnetic forces can act at a distance without direct contact.

Answer 2

Ellie made an electromagnet with wire, a nail, and a 2.5-volt battery. The electromagnet attracted a paper clip from 2 inches away.

What action will make the electromagnet weaker?

(1 point)
Responses

She can use a thicker piece of wire.
She can use a thicker piece of wire.

She can use a higher voltage battery.
She can use a higher voltage battery.

She can wrap the wire more times around the nail.
She can wrap the wire more times around the nail.

She can decrease the number of coils around the nail.

Answer 3

The action that will make the electromagnet weaker is:

She can decrease the number of coils around the nail.

Fewer coils around the nail result in a weaker magnetic field, thus reducing the strength of the electromagnet.

Answer 4

Electric motors create motion by using magnets and electromagnets.

What can a person do to make an electric motor stronger?

(1 point)
Responses

Add coils to the electromagnet and use larger magnets
Add coils to the electromagnet and use larger magnets

Add coils to the electromagnet and smaller magnets
Add coils to the electromagnet and smaller magnets

Remove coils from the electromagnet and use larger magnets
Remove coils from the electromagnet and use larger magnets

Remove coils from the electromagnet and use smaller magnets

Answer 5

To make an electric motor stronger, a person can:

Add coils to the electromagnet and use larger magnets.

Increasing the number of coils enhances the strength of the electromagnet, while using larger magnets provides a stronger magnetic field, both contributing to a more powerful motor.

Answer 6

girl is trying to make a simple electromagnet to help her pick up a piece of metal she dropped under a car. Which list of materials would she need to make an electromagnet?(1 point)
Responses

plastic rod for a core, copper wire, 12-volt battery
plastic rod for a core, copper wire, 12-volt battery

metal rod for a core, copper wire, 12-volt battery
metal rod for a core, copper wire, 12-volt battery

wooden rod for a core, copper wire, 12-volt battery
wooden rod for a core, copper wire, 12-volt battery

glass rod for a core, copper wire, 12-volt battery

Answer 7

To make a simple electromagnet, the girl would need:

metal rod for a core, copper wire, 12-volt battery.

Using a metal rod (such as iron) for the core enhances the magnetic field created by the copper wire when current flows from the battery.

Answer 8

Which statement is true about the variables that affect the force of gravity between two objects?(1 point)
Responses

Force of gravity is affected by the volume of the objects and their velocity relative to the Sun.
Force of gravity is affected by the volume of the objects and their velocity relative to the Sun.

Force of gravity is affected by the diameters of the objects and their distance from the Sun.
Force of gravity is affected by the diameters of the objects and their distance from the Sun.

Force of gravity is affected by the masses of the objects and the distance between their outermost edges.
Force of gravity is affected by the masses of the objects and the distance between their outermost edges.

Force of gravity is affected by the masses of the objects and the distance between their centers.
Force of gravity is affected by the masses of the objects and the distance between their centers.

Answer 9

The true statement about the variables that affect the force of gravity between two objects is:

Force of gravity is affected by the masses of the objects and the distance between their centers.

The gravitational force is directly proportional to the mass of each object and inversely proportional to the square of the distance between their centers (as described by Newton's law of universal gravitation).

Answer 10

Below is a table that lists the different masses of planets and Steve’s mass.

If Steve were standing on each planet, which is the correct order of the planets from the one that has the highest force of gravity to lowest force of gravity?

(1 point)
Responses

Earth, Mars, Venus
Earth, Mars, Venus

Mars, Venus, Earth
Mars, Venus, Earth

Venus, Earth, Mars
Venus, Earth, Mars

Earth, Venus, Mars
Earth, Venus, Mars
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Answer 11

To determine the correct order of the planets from the one that has the highest force of gravity to the lowest, we need to consider the relative gravitational forces on each planet. Typically, the order based on gravitational force from highest to lowest is:

1. Earth (highest gravity)
2. Venus
3. Mars (lowest gravity)

Thus, the correct order of the planets from the one that has the highest force of gravity to the lowest force of gravity is:

Earth, Venus, Mars.