Exit Check 6.4: Electricity and Magnetism

6.4.1

Which of the following explains why electrical energy is a type of kinetic energy?

• Electrical Energy is the movement of electrons (negative charges).

• Electrical energy is sometimes used to power both toy and real cars.

• When people get shocked in movies, it always makes them move

• Electrical Energy is always causes by friction such as fur rubbing against amber.

Answer explanation

This question links to success criteria 6.4.1: I can explain what electricity is and the conditions under which it will flow.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

6.4.1

Which of the following is always needed for an electrical current to flow?

• A compass

• A closed circuit

• An open circuit

• A lightbulb

Answer explanation

This question links to success criteria 6.4.1: I can explain what electricity is and the conditions under which it will flow.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

6.4.2

If the current is going up on the front side of the coil then what side of the electromagnet is north?

• Up
• Down
• Left
• Right

Answer explanation

This question links to success criteria 6.4.2: I can relate a flowing electric current to the generation of a magnetic field.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

6.4.2

Students attached both ends of a long wire to the poles of a battery and wrapped the wire around a spoon. In this arrangement, the spoon is able to pick up five paper clips. The students wrap more wire around the spoon and want to determine if the strength of the magnetic force has increased. Which of the following observations would indicate that wrapping more wire has increased the strength of the electromagnet?

• More wire was needed to wrap around the spoon.

• Eventually, the battery runs out of energy.

• The spoon now picks up seven paper clips.

• The ends of the wire must touch the battery's poles.

Answer explanation

This question links to success criteria 6.4.2: I can relate a flowing electric current to the generation of a magnetic field.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

6.4.3

Which is point C on the speaker diagram?

• Permanent Magnet

• Cone

• Electromagnet

• Transistor

Answer explanation

This question links to success criteria 6.4.3: I can explain how electromagnetism can be used to convert electrical energy into various forms of kinetic energy.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

6.4.3

To make sound a speaker has to be able to move the cone back and forth. Using the picture, explain how this can be done.

• It can't that is why big speakers have two sound cones, one only uses attraction, the other only uses repulsion.

• By flipping the direction of the current, the electromagnet can be made to repel or attract.

• By playing good music, when the song is really good everyone taps their feet, even the speaker.

• Speaker's have a device called a commutator that spins to switch the direction of the current.

Answer explanation

This question links to success criteria 6.4.3: I can explain how electromagnetism can be used to convert electrical energy into various forms of kinetic energy.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

6.4.3

Which of the following best describes a simple electric motor?

• The battery inside the motor is spinning which causes the current to constantly change which makes it go in a circle.

• The commutator causes the direction of the magnets to constantly flip

  which lets it push to make sound.

• The commutator causes the direction of the current to constantly flip which makes it go around in a circle.

• Motors are magic, they go in circles because circles are pretty.

Answer explanation

This question links to success criteria 6.4.3: I can explain how electromagnetism can be used to convert electrical energy into various forms of kinetic energy.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Tags

NGSS.MS-PS2-3

6.4.3 Electric motors are devices that convert ​ (a)   energy into ​ (b)   energy.

• chemical
• potential
• radiant
• electrical
• kinetic

Answer explanation

This question links to success criteria 6.4.3: I can explain how electromagnetism can be used to convert electrical energy into various forms of kinetic energy.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

6.4.4

Which best describes where the Earth's magnetic field comes from?

• The Earth's core is a giant permanent magnet

• The spinning Earth makes the charges in the core move, which makes a magnetic field

• The high temperatures in the core make the charges move which makes a magnetic field

• Rising convection currents + the rotation of the Earth makes charges in liquid metal flow which makes a magnetic field.

Answer explanation

This question links to success criteria 6.4.4: I can relate the flowing charges in the core of a planet to the planet’s magnetic field.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Tags

NGSS.HS-ESS2-1

NGSS.HS-ESS2-3

6.4.4

Which of the following could be used to predict the strength of another planet's magnetic field?

• by measuring the speed of the planet's rotation.

  Faster spinning = stronger magnet.

• by measuring conditions in the planet's core.

  More moving charges = stronger magnet.

• by measuring the size of the planet.

  More mass = stronger magnet.

• by measuring the planet's distance from its star.

  Greater average distance = stronger magnet.

Answer explanation

This question links to success criteria 6.4.4: I can relate the flowing charges in the core of a planet to the planet’s magnetic field.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5