Electromagnetic force quiz
Authored by K Zindel
Science
8th Grade
NGSS covered
Used 16+ times
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34 questions
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1.
OPEN ENDED QUESTION
15 mins • 8 pts
Static electricity occurs when charges build up on an object instead of flowing. The static charge on the object can build up in one of four ways. Name and give an example of each of the four ways that static electricity can be created.
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Answer explanation
Conduction: contact
Induction: near by but no contact
Polarization: push charge to otherside of item
Friction: Build up of charge due to rubbing of materials.
Tags
NGSS.MS-PS2-5
2.
OPEN ENDED QUESTION
3 mins • 6 pts
The magnetic field of Earth acts very similarly to a bar magnet. The magnetic field is created by molten iron within Earth’s core. Humans and animals rely on the magnetic field for navigation. Describe how the magnetic field is used for navigation, and explain how it protects life on Earth.
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Answer explanation
A magnetized needle creates a compass, which is used for
navigation. The magnetized needle aligns itself with the magnetic field lines
around Earth so that it always points towards the north magnetic pole. This
allows people to know which direction they are traveling in. Earth’s magnetic
field protects life on Earth from charged particles that stream from the sun,
called solar wind. Earth’s magnetic field changes the motion of the charged
particles so that they flow past Earth and into space.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
You are creating a circuit with a series of materials, which material would be best to use in terms to slowing the flow of the circuit?
Conductors have free electrons that allow easy flow of electric current.
Insulators have tightly bound electrons that resist the flow of electric current.
Conductors are made of insulating materials that block electric current.
Insulators convert electric current into heat more efficiently than insulators.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A proton is placed next to a negatively charged object. In which direction would the proton move?
Towards the negatively charged object
Away from the negatively charged object
It will not move
It will move randomly
Tags
NGSS.MS-PS2-3
NGSS.MS-PS2-5
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If you move two objects with opposite charges towards one another, what happens to the potential energy between them?
The potential energy increases.
The potential energy decreases.
The potential energy remains the same.
The potential energy becomes zero.
Tags
NGSS.MS-PS3-2
6.
DRAG AND DROP QUESTION
1 min • 3 pts
Sarah is building a diorama showing the parts of an atom. She wants to better understand the effects of electric forces. An atom is made up of particles called protons, neutrons, and electrons. Choose from the word bank to complete the sentences. Sarah learns that electric forces are (1) (a) between particles like protons and electrons. The electric forces are (2) (b) between particles like two protons. These forces can be experienced over a distance due to (3) (c) . Word bank: explosive, attractive, neutral, repellent, electric fields, electric discharge, electric charge, potential energy.
Tags
NGSS.MS-PS2-3
NGSS.MS-PS2-5
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
After Sandra combs her hair, she notices that her hair moves toward the comb. Choose the answer that properly describes the charges that build up on her comb vs on her hair.
The comb has taken on a positive charge, while her hair takes on a negative charge.
The comb takes on a negative charge, while her hair takes on a negative charge.
The comb takes on a positive charge, while her hair takes on a positive charge.
The comb takes on a negative charge, while her hair takes on a positive charge.
Tags
NGSS.MS-PS2-3
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