Mini Test Mrs Conner Lesson 1

Question 1

Workdone=

Answer 1

Force (n) x distance (m)

Question 2

Gravitational potential =

Answer 2

Mass x g x height

Question 3

Power =

Answer 3

Work done (J) / time (s)

Question 4

Kinetic energy =

Answer 4

Kinetic energy = 1/2 x mass x velocity2

Question 5

Covection

Answer 5

Warm air is less dense as it expands so it rises

Cool air is more dense so it contracts and sinks

Question 6

Land and sea breeze

Day

Answer 6

Land is heated by the sun 
Warm air rises 
Bea she it's less dense 
Warm air I replaced by cool air from the sea 
Creates Convection current

Question 7

Land and sea breeze

Night

Answer 7

Sea stays warmer at night

Air above the sea is warmed and rises as it is less dense

Question 8

Radiation is the only method

Answer 8

that heat energy can travel through space

Question 9

Infrared radiation

Answer 9

Part of electromagnetic spectrum and travels at speed of light through vacuum

Question 10

Conduction

Answer 10

Is the energy transfer from hot to cold

Question 11

Energy is transferred by

Answer 11

Vibration

Question 12

What aids conduction

Answer 12

Metals have free electrons to aid conduction

Question 13

Solids are the the best

Answer 13

Conductors

Question 14

Insulator is a

Answer 14

Poor conduction

Question 15

Insulating materials

Answer 15

Wool

Firbre glass

Question 16

What is best imiter of radiation why ?

Answer 16

Black, best observer of radiation

Question 17

Wool traps …

Answer 17

Air which is a poor conductor as it is a gas

Question 18

On graph which line will be steeper
Colour wise for black and silver
Radiation

Answer 18

Silver would be steeper