Training book - Review

Question 1

Which Meduim conducts heat the fastest?

Answer 1

Solids because the particles are closer together.

Question 2

Insulators are

Answer 2

Bad conductors

Question 3

The transfer of energy is

Answer 3

when the form stays the same but travel to a new region or medium.

Question 4

Conduction

Answer 4

Direct contact of Particles to transfer heat energy.

Question 5

Convection is

Answer 5

Warm air rises as it is less dense and cool air sink as its more dense.
eg. Aircon.

Question 6

Radiation is

Answer 6

Method of heat transfer NOT needing particles. Eg. sun radiation heating earth.

Question 7

Transformation of energy is when

Answer 7

There is a change in the
form of energy.

Question 8

Transformation of energy example:

Answer 8

Sound > eletrical > sound

Question 9

Series circuit

Answer 9

globes are in a row, more globes means more resistance therefore dimmer light

Question 10

Ammeter

Answer 10

measures current (amps)

Question 11

Voltmeter

Answer 11

Set up in parallel, measures voltage in volts.

Question 12

parallel circuit

Answer 12

Light globes on separate ‘arms’ of the circuit, more globes means the same resistance and brightness.

Question 13

Ohms law

Answer 13

Shows the relationship between voltage, current and resistance
V = I x R

Question 14

Transverse Wave

Answer 14

Particles move up and down, electromagnetic spectrum. Eg -light.

Question 15

Compression Wave

Answer 15

Particles move side to side, compression, and rarefaction. Eg sound waves

Question 16

Wavelength

Answer 16

Distance between successive points. troughs or crests.

Question 17

Frequency

Answer 17

Number of wavelengths completed in a second, Measured in hertz

Question 18

How to find the velocity of a wave.

Answer 18

Velocity(m/s) =
Frequency(Hz) x Wavelengths (m)

Question 19

Light travels in

Answer 19

Straight lines

Question 20

Incident ray

Answer 20

Ray coming in

Question 21

Reflected ray

Answer 21

Ray reflected off surface

Question 22

Normal

Answer 22

90 degrees adjacent to reflective surface

Question 23

The angle of incidence =

Answer 23

The angle of reflection

Question 24

Transparent

Answer 24

All light rays pass through.
Eg. glass

Question 25

translucent

Answer 25

Some light rays pas through Eg. Frosted glass

Question 26

opaque

Answer 26

No light pass through Eg. wood

Question 27

Refraction

Answer 27

When light passes through the substance of different densities they slow down (bends towards normal) or speed up ( bend away)

Question 28

Gamma rays

Answer 28

The shortest wavelength,and highest frequency and energy

Question 29

Radio waves

Answer 29

The largest wavelength,and lowest frequency and energy.

Question 30

Sound can only be transmitted when

Answer 30

where particles are present.

Question 31

The pitch of a sound depends on how

Answer 31

Fast the air vibrates.

Question 32

High pitch =

Answer 32

High-frequency and fast-moving particles

Question 33

Low pitch =

Answer 33

low frequency and slow-moving particles

Question 34

Independent variable

Answer 34

One that changes, independant on its own

Question 35

dependant variable

Answer 35

dependant on the other one,

Question 36

The X-axis has which variable

Answer 36

Independent

Question 37

The Y axis has which variable

Answer 37

Dependant