Primary 4 Basic Science and Technology Flashcards: Types, Generation, Conductors and Static Electricity

Question 1

What is electricity?

Accepted Answer

a form of energy used to power devices

Question 2

What are the two basic types of electricity taught in this lesson?

Accepted Answer

static electricity and current electricity

Question 3

What is static electricity?

Accepted Answer

electric charge that gathers on an object

Question 4

What is current electricity?

Accepted Answer

the continuous flow of electric charge

Question 5

Rubbing a plastic comb on dry hair can produce ____ electricity.

Accepted Answer

static

Question 6

A battery produces ____ electricity in a circuit.

Accepted Answer

current

Question 7

What is an electrical conductor?

Accepted Answer

a material that allows electric current to pass through

Question 8

What is an electrical insulator?

Accepted Answer

a material that resists the flow of electric current

Question 9

Which is a conductor: copper wire, dry wood, rubber, or plastic?

Accepted Answer

copper wire

Question 10

Which is NOT an electrical insulator: glass, rubber, plastic, or iron?

Accepted Answer

iron

Question 11

Why are electric wires covered with plastic?

Accepted Answer

plastic insulates users from electric current

Question 12

Static charge on a comb can attract small pieces of ____.

Accepted Answer

paper

Question 13

Electricity may be generated using flowing water at a ____ station.

Accepted Answer

hydroelectric power

Question 14

Sunlight can be changed into electricity by a ____.

Accepted Answer

solar panel

Question 15

A generator changes mechanical energy into ____ energy.

Accepted Answer

electrical

Question 16

The correct safety action near a damaged wire is to ____.

Accepted Answer

keep away and tell an adult

Question 17

Why must wet hands not touch switches?

Accepted Answer

water can increase the risk of electric shock

Question 18

Which materials should be grouped together as conductors: copper and iron, rubber and plastic, wood and glass, or paper and cloth?

Accepted Answer

copper and iron

Question 19

The main difference between conductors and insulators is their ability to ____.

Accepted Answer

allow electric current to pass

Question 20

What must a simple electric circuit have for current to flow?

Accepted Answer

a complete path

Strong work.