8th grade science

Question 1

Battery

Answer 1

A device that stores chemical energy and converts it to electrical energy

Question 2

Watts

Answer 2

Unit of Power

Question 3

Difference between parallel and series circuits

Answer 3

Parallel circuits - individual lights can go on and off

Series Circuits - All lights go off and all go on

Question 4

What is the difference between endo-thermic and exo-thermic?

Answer 4

One releases, and one absorbs heat

Question 5

Joule

Answer 5

Measure of capacity to do work or generate heat

Question 6

Alternating currents

Answer 6

The values of the quantity and direction of the current are not constant. It changes at a regular interval

Question 7

Current

Answer 7

Rate of flow of negative charges in an electric current

Question 8

Electricity

Answer 8

A form of energy resulting from the existence in charged particle

Question 9

Semiconductors

Answer 9

Conducts some things well and some bad

Question 10

Transformers

Answer 10

The device that transfers electric energy from one current to another

Question 11

Direct current

Answer 11

Electric current that flows consistently in one direction

Question 12

Catalyst

Answer 12

Substance that changes the rate of the chemical reaction

Question 13

Power

Answer 13

Rate at which energy is transferred

Question 14

Law of conservation of Energy

Answer 14

Energy can not be created or destroyed only changed in form

Question 15

Parallel circuit

Answer 15

Multiple branches for electricity to form

Question 16

potential energy

Answer 16

The energy that comes from position or condition. The higher the object, the more potential energy it has

Question 17

Electrodes

Answer 17

Good conductors of electricity that is usually connecting nonmetals

Question 18

Ohm’s law

Answer 18

Voltage = residence * current

Question 19

Voltage

Answer 19

Voltage is a measure of how difficult it is for electrons to flow through a material

Question 20

circuit

Answer 20

A circuit is a complete circular path that electricity flows through.

Question 21

Insulators

Answer 21

a material in which electrons can not move easily from place to place

Question 22

conductors

Answer 22

Allow electrons to move through easily

Question 23

ions

Answer 23

An atom or molecule with a net electric charge

Question 24

Kinetic energy

Answer 24

Objects in motion has kinetic energy

Question 25

Resistance

Answer 25

The measure of how difficult it is for electrons to flow through a material

Question 26

electric current

Answer 26

Steady flow of electrons through a conductor measure in units of ampers

Question 27

series circuit

Answer 27

Only one path for an electric current to follow

Question 28

Energy transformation

Answer 28

The change of energy from one form to another

Question 29

Energy

Answer 29

Energy is the ability to change

Question 30

draw a parallel and series circuit