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Question 1 Match the vocabulary word to its definition. Column A 1. attraction: attraction 2. magnetic field: magnetic field 3. electric force: electric force 4. electron: electron 5. energy: energy 6. kinetic energy: kinetic energy 7. potential energy: potential energy 8. repulsion: repulsion Column B a.the energy of motion b.the region around an object that exerts a force on other charged objects c.the energy stored in an object due to its position d.the electric or magnetic force that acts between like charged objects, causing them to push apart e.ability to do work f.negatively charged subatomic particles found in all atoms g.the electric or magnetic forces that acts between oppositely charged objects, causing them to be pulled together h.the attractive or repulsive interaction between two charged particles Question 2 Match the vocabulary word to its defintion. Column A 1. magnet: magnet 2. magnetic pole: magnetic pole 3. current: current 4. electromagnet: electromagnet 5. force: force 6. magnetic domain: magnetic domain Column B a.a push or pull upon an object resulting from the object's interaction with another object b.the rate at which electric charge flows past a point on the electric circuit c.region at each end of a magnet where the magnetic field is strongest d.a region within a magnetic material in which the magnetization is in a uniform direction e.a magnet created by passing an electric current through coils in a wire f.any material capable of attracting iron and producing a magnetic field outside itself Question 3 When two North Poles of a magnet are held together, they will: a Attract b Repel c They will not do anything Question 4 Where is the magnetic field the strongest? a The magnetic field is the same strength no matter where you are b Close to the magnet c Further away from the magnet Watch the following video and answer the corresponding questions: Question 5 Magnetic metals include aluminum, copper, and gold. True False Question 6 Which of the following are uses of magnets/magnetic fields (Select all that apply) a Bird Migration b MRI machines c Creating energy d Maglev train Question 7 The image above shows a magnetized object. True False Question 8 A nail can be magnetized when it comes into contact with a permanent magnet because its domains become aligned. True False Question 9 How could you increase the strength of your electromagnet? (Select all that apply) a Increase the current flowing through the coils b Increase the number of coils c Decrease the current flowing through the coils d Decrease the number of coils Question 10 What are some of the uses of electromagnets from the video? (Select ALL correct answers) a ball point pens b cars c junk yards d toasters Question 11 What are the benefits, "strengths" of electromagnets? (Select ALL correct answers) a They can be turned off and on b They can be made stronger c Greater strength (compared to regular magnets of the same size) d They require electricity to work Question 12 What are the downsides, "weaknesses" of electromagnets? (Select ALL correct answers) a To work like permanent magnets, they require a constant source of power b They require power/electricity c They can be made stronger d They can be stronger, for the size, than regular magnets Question 13 Match the following to the correct answer: Column A 1. Protons: Protons 2. Electrons: Electrons 3. Neutrons: Neutrons 4. Like charges...: Like charges... 5. Opposite charges...: Opposite charges... Column B a.no charge b.positive charge c.negative charge d.repel e.attract Question 14 What is the unit for force? a Meters b Seconds c Newtons d Joules Question 15 In the equation for Coulomb's Law, q can have a negative value only. True False Question 16 If the value of F is positive, this tells us that the two objects are: a attracted to one another b this doesn't give us any information about the objects c repelled by one another Question 17 Based on Coulomb's Law, what happens to the force if you triple the distance? a Force will be 9x as large b Force will be 1/9 as large c Force will be 3x as large d Force will be 1/3 as large Question 18 Which of the four fundamental forces is responsible for holding the nucleus of an atom together? a strong force b weak force c gravity d electromagnetic force Question 19 Which of the four fundamental forces is responsible for all objects with mass being attracted to each other? a strong force b weak force c gravity d electromagnetic force Question 20 Is magnetism a contact or noncontact force? a contact b noncontact c both d it depends Question 21 What is the unit for electrical charge? a Newton b Coulomb c Watt d Joule Question 22 Maglev trains use attraction and ___________________________ of magnets to move the train. a field forces b repulsion c resistance d magnetism Question 23 Maglev trains are able to levitate based on the physic priciple that opposites attract while like ________________________. a resist b cancel out c repel Please read: The following questions are review questions from Units 2 and 3. Remember, your tests are cumulative so you will see material from previous units on all tests. Question 24 Simple machines reduce the amount of work done. True False Question 25 The efficiency of a simple machine is ____________________________________________________________. a greater than 100% b equal to 100% c always less than 100% d less than 50% Question 26 Would a person have more mass on Earth or the Moon? a Earth b Moon c neither, mass doesn't change d between Earth and the Moon Question 27 For an object to be in free fall... a it is falling at a constant velocity b gravity can be the only force acting on the object c the object must be a perfect sphere d the object must be on Earth Question 28 Mass and ___________________ are used to calculate kinetic energy. a gravity b weight c velocity d height Question 29 Potential energy is calculated using mass, gravity, and __________________________ of an object. a weight b height c velocity d acceleration Review Answers PrevNext English

1 answer

Sure! Here are the answers organized by question number.

Question 1: Match the vocabulary word to its definition.

  1. attraction: h. the attractive or repulsive interaction between two charged particles
  2. magnetic field: b. the region around an object that exerts a force on other charged objects
  3. electric force: g. the electric or magnetic forces that act between oppositely charged objects, causing them to be pulled together
  4. electron: f. negatively charged subatomic particles found in all atoms
  5. energy: e. ability to do work
  6. kinetic energy: a. the energy of motion
  7. potential energy: c. the energy stored in an object due to its position
  8. repulsion: d. the electric or magnetic force that acts between like charged objects, causing them to push apart

Question 2: Match the vocabulary word to its definition.

  1. magnet: f. any material capable of attracting iron and producing a magnetic field outside itself
  2. magnetic pole: c. region at each end of a magnet where the magnetic field is strongest
  3. current: b. the rate at which electric charge flows past a point on the electric circuit
  4. electromagnet: e. a magnet created by passing an electric current through coils in a wire
  5. force: a. a push or pull upon an object resulting from the object's interaction with another object
  6. magnetic domain: d. a region within a magnetic material in which the magnetization is in a uniform direction

Question 3

When two North Poles of a magnet are held together, they will:
b. Repel

Question 4

Where is the magnetic field the strongest?
b. Close to the magnet

Question 5

Magnetic metals include aluminum, copper, and gold. False

Question 6

Which of the following are uses of magnets/magnetic fields (Select all that apply)

  • a. Bird Migration
  • b. MRI machines
  • c. Creating energy
  • d. Maglev train

Answer: a, b, c, d

Question 7

The image above shows a magnetized object. (Please provide the image for accurate answer; if not available, answer can neither be confirmed nor denied)

Question 8

A nail can be magnetized when it comes into contact with a permanent magnet because its domains become aligned. True

Question 9

How could you increase the strength of your electromagnet? (Select all that apply)

  • a. Increase the current flowing through the coils
  • b. Increase the number of coils

Answer: a, b

Question 10

What are some of the uses of electromagnets from the video? (Select ALL correct answers)

  • a. ball point pens
  • b. cars
  • c. junk yards
  • d. toasters

Answer: b, c

Question 11

What are the benefits, "strengths" of electromagnets? (Select ALL correct answers)

  • a. They can be turned off and on
  • b. They can be made stronger
  • c. Greater strength (compared to regular magnets of the same size)

Answer: a, b, c

Question 12

What are the downsides, "weaknesses" of electromagnets? (Select ALL correct answers)

  • a. To work like permanent magnets, they require a constant source of power
  • b. They require power/electricity

Answer: a, b

Question 13: Match the following to the correct answer.

  1. Protons: b. positive charge
  2. Electrons: c. negative charge
  3. Neutrons: a. no charge
  4. Like charges...: d. repel
  5. Opposite charges...: e. attract

Question 14

What is the unit for force?
c. Newtons

Question 15

In the equation for Coulomb's Law, q can have a negative value only.
False

Question 16

If the value of F is positive, this tells us that the two objects are:
c. repelled by one another

Question 17

Based on Coulomb's Law, what happens to the force if you triple the distance?
b. Force will be 1/9 as large

Question 18

Which of the four fundamental forces is responsible for holding the nucleus of an atom together?
a. strong force

Question 19

Which of the four fundamental forces is responsible for all objects with mass being attracted to each other?
c. gravity

Question 20

Is magnetism a contact or noncontact force?
b. noncontact

Question 21

What is the unit for electrical charge?
b. Coulomb

Question 22

Maglev trains use attraction and ___________________________ of magnets to move the train.
b. repulsion

Question 23

Maglev trains are able to levitate based on the physics principle that opposites attract while like ________________________.
c. repel

Question 24

Simple machines reduce the amount of work done.
False

Question 25

The efficiency of a simple machine is ____________________________________________________________.
c. always less than 100%

Question 26

Would a person have more mass on Earth or the Moon?
c. neither, mass doesn't change

Question 27

For an object to be in free fall...
b. gravity can be the only force acting on the object

Question 28

Mass and ___________________ are used to calculate kinetic energy.
c. velocity

Question 29

Potential energy is calculated using mass, gravity, and __________________________ of an object.
b. height

If you have any other questions or need further explanation on any topic, feel free to ask!