Chapter 7 Practice

​ ​ (a)   are regions of space that surround a magnet and exert a force on other magnets and objects made of magnetic material.

• Magnetic fields
• Magnetic poles
• Magnetism
• Magnets

Tags

NGSS.MS-PS2-5

According to the model, what might diesel engines be considered as? They convert mechanical energy into electrical energy.

• motors

• generators

• turbines

• electromagnets

Tags

NGSS.MS-PS3-5

Both motors and generators convert...

What causes a current to be induced in the coil of a rotating turbine? Look closely at the diagram!

• the attractive and repulsive forces between the coil and the turbine

• the changing magnetic fields the coil is in

• the mechanical energy being transmitted by the motor

• the electrical energy being transmitted by the generator

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

​ (a)   refers to the properties and interactions of magnets. A magnet is surrounded by a ​ (b)   that exerts a force on magnetic material. The place where the magnet exerts the most force are the ​ (c)   . Opposite poles​ (d)   and like poles ​ (e)   .

• Magnetism
• magnetic field
• magnetic poles
• attract
• repel
• Electomagnetism
• magnet field line
• magnetic domains

Tags

NGSS.MS-PS2-5

(a)   contain magnetic properties; in most elements' atoms, the magnetic properties ​ (b)   . In magnetic materials, the magnetic field created by each atom exerts a force on other nearby atoms. The forces cause groups of other atoms to align. The atoms aligned are together called ​ (c)   . As they align, their magnetic fields combine to make a magnetic field in the material. In a ​ (d)   , the field is strong enough to prevent the constant motion of the atoms from bumping domains out of alignment and it's not manmade!

• Electrons
• cancel out
• magnetic domains
• natural magnet
• Protons
• Neutrons
• permanent magnet
• combine
• atomic domains

Tags

NGSS.MS-PS2-5

Reorder the following using this prompt.

If the Earth lost its _____, _____ would strip away the ______ from Earth’s _______; leaving us exposed to _______.

• atmosphere

• UV radiation

• solar winds

• ozone layer

• magnetic field

The magnetic field arises from the _______ of molten iron and nickel metals in the Earth's liquid ______.

• radiation, outer core

• radiation, inner core

• convection, outer core

• convection, inner core

Bonus Question!

In what year did H.C. Oersted discover that an electric current flowing through a wire had a magnetic field around it?

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Generators and motors convert which two types of energy?

• mechanical

• thermal

• electrical

• radiant

Tags

NGSS.HS-PS3-3