Electricity Investigation

Question 1

what does Sonar stand for

Answer 1

SOund Navigation And Ranging

Question 2

Use fo Sonar

Answer 2

Used to locate and detect shipwrecks and fish. Uses high frequency noises. Works by measuring time taken for noises to echo back to ship.

Question 3

Echolocation

Answer 3

Used by animals to find prey and detect surroundings

Question 4

Name the spectrums of the electromagnetic spectrum in order

Answer 4

Radio waves
Infrared radiation
Visible light
Ultraviolet radiation 
X-rays
Gamma rays
Electromagnetic waves

Question 5

Radio waves

Answer 5

Low energy waves

Used to communicate over long distances

Question 6

Infra-red radiation

Answer 6

Created by all objects and sensed as heat

Question 7

Visible light

Answer 7

Visible
Plants cant photosynthesis without it
Travels at 300 000 kilometres per second

Question 8

Ultraviolet radiation

Answer 8

Needed by body to make vitamin D

Question 9

X-rays

Answer 9

Enough energy to pass through flesh.

Produced when fast-moving electrons give up energy quickly. Happens when electrons hit a target made of tungsten

Question 10

Gamma rays

Answer 10

Used to kill cancer cells and find weakness in metal.

Question 11

Electromagnetic waves

Answer 11

Waves travel through air at 300 000 000m/s. Can travel in a vacuum.
Waves consist of repeating pattern of electric and magnetic forces, forces generated by by changes in speed/direction of moving electric charge

Question 12

3 possible situations when light comes in contact with an object

Answer 12

Reflection, pass through, absorbed

Question 13

Reflection

Answer 13

Light bounces off surface

Question 14

Luminous

Answer 14

Produces own light

Question 15

Scattering

Answer 15

Light reflects when inside the object

Question 16

Transparent

Answer 16

Object where light can pass through

Question 17

Translucent

Answer 17

Some light passes through but not all

Question 18

Opaque

Answer 18

No light can pass through material

Question 19

3 types of mirrors

Answer 19

Plain - straight
Concave - curved in
Convex - curved out

Question 20

Law of reflection

Answer 20

Light is reflected of surface at same angle it bounced onto

Question 21

Focal point

Answer 21

When parallel rays bounce of concave or convex mirror, their intersection point is known as the focal point

Question 22

Lateral inversion

Answer 22

Sideways reversal of images they you se when you look in a mirror

Question 23

Refraction

Answer 23

When light travels from a denser or less dense medium into another medium it bends

Question 24

Image

Answer 24

Picture seen in mirror or water

Question 25

Electric circuit

Answer 25

Pathway in which electricity passes through

Question 26

Static electricity

Answer 26

Doesn’t move | Only moves when enough has built up.

Question 27

3 essentials in electric circuits

Answer 27

Power supply Load Conductive path

Question 28

Power supply

Answer 28

Provides the electrical energy

Question 29

Load

Answer 29

Where electrical energy is converted to useful forms of energy

Question 30

Conductive path

Answer 30

Allows electric charge to flow around the circuit

Question 31

How batteries work

Answer 31

Stores chemical energy and is released into electrical energy when chemical reaction takes place

Question 32

Electric current

Answer 32

Flow of electric charge Measure of amount of electric charge passing a particular point in circuit every second. Defined as direction of movement of positive charge. Current caused by negatively charged energy

Question 33

Voltage

Answer 33

Measure of amount of electrical energy gained or lost by electrical charge as it moves through circuit.

Question 34

2 types of circuits

Answer 34

Parallel | Series

Question 35

Parallel circuit

Answer 35

Each component is connected in seperate conductive path. | Same voltage all around the circuit, current different all around

Question 36

Series circuit

Answer 36

Power supply, load and conductive path all in line | Same current all round the circuit, different voltage all round

Question 37

2 factors affecting speed of energy flow

Answer 37

Amount of energy each electron has. | Number of electrons passing through the globe every second

Question 38

Electrical insulator

Answer 38

Has a large energy resistence

Question 39

Factors affecting resistance

Answer 39

Type of material Length of wire Diameter or thickness of the wire Temperature of the wire

Question 40

Resistance

Answer 40

Measure of how difficult it is for electrons to flow through part of a circuit.

Question 41

Variable resistor

Answer 41

Device in which resistance can be affected

Question 42

What is the electromagnetic spectrum

Answer 42

Range of wavelengths over which electromagnetic radiation extends