S8P5A

What is the difference between charging by conduction and charging by induction?

• during conduction, charges move between objects that briefly touch; during induction, charges move between objects that are rubbed together

• during induction, charges move between objects that briefly touch; during conduction, charges move between objects that are rubbed together

• during conduction, charges move between touching objects; during induction, charges are redistributed within an object that is near another object

• during induction, charges move between touching objects; during conduction, charges are distributed within an object that is near another object

Two charged particles are near each other, but they do not touch. Which process is possible?

• charging by friction

• charging by induction

• charging by conduction

• charging only happens between objects that touch

Tags

NGSS.MS-PS2-5

Two neutrally charged balloons are touching. What will happen if a positively charged rod is brought near one of the balloons without touching it?

• the balloons will move toward each other

• the balloons will move away from each other

• electrons on the balloons will move toward the rod

• electrons on the balloons will move away from the rod

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which of the following is an electrical insulator?

• copper

• rubber

• aluminum

• iron

Tags

NGSS.MS-PS2-3

A science lab has copper wire coasted with rubber tubing, a plastic vial, and a pair of cotton gloves. Which of these materials is not an electrical insulator?

• copper wire

• cotton gloves

• plastic

• rubber tubing

How do an electric motor and electric generator differ?

• one uses a permanent magnet, while the other uses temporary magnets

• one produces electrical energy, while the other produces thermal energy

• one contains moving parts, while the other has only parts that do not move

• one uses an electric current to produce motion, while the other uses motion to produce an electric current

Which change would result in a stronger generator (aka electromagnet)?

• reducing the number of batteries

• increasing the voltage of the battery

• substituting another metal for the iron core

• decreasing the number of coils around the iron core

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

Which two factors affect the strength of the gravitational pull between two objects?

• Weight and Distance

• Mass and Distance

• Weight and Density

• Mass and Density

Tags

NGSS.MS-PS2-4

Which best describes why gravity on Earth has a stronger attraction with you than the Sun has?

• Earth has more mass than the Sun, allowing a stronger attraction to form.

• The Sun has more mass than Earth.

• Earth has a smaller mass than the Sun, but it is much closer to you than the Sun, allowing for a stronger attraction.

• Earth has more magnetism than the Sun.

Tags

NGSS.MS-PS2-4

The greater an object’s mass, the greater its pull of ____________.

• gravity

• repulsion

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4