Topic 3 Part 1 - What is snow?

Question 1

What does the size of snowflakes depend on?

Answer 1

The size of snowflakes is dependent upon the temperature and amount of water vapour available at the time of development.

Question 2

What percentage of earth does snowflakes cover?

Answer 2

About 23% of the earths surface

Question 3

At above which temperatures does ice crystals form around small particles of dust in the air to form snowflakes?

Answer 3

-40 degrees Celsius

Question 4

How big is the atmostphere?

Answer 4

100 km

Question 5

What is the equation for volume?

Answer 5

Volume = Length x breadth x height

Question 6

What is the equation for density?

Answer 6

p = m / V

Question 7

What is the SI for density?

Answer 7

p is density, km m ^-3

Question 8

What is the SI for mass?

Answer 8

kg

Question 9

What is the SI for volume?

Answer 9

m^3

Question 10

What is the equation for the circumference of a circle?

Answer 10

c=2πr or c=πd

Question 11

What is troposphere?

Answer 11

The troposphere is the lowest layer of Earth’s atmosphere

Question 12

Thermal conduction

Answer 12

Thermal conduction is the transfer of internal energy by microscopic collisions of particles and movement of electrons within a body.

Question 13

Convection (Heat)?

Answer 13

Convection (or convective heat transfer) is the transfer of heat from one place to another due to the movement of fluid.

Question 14

endothermic process

Answer 14

a chemical reaction in which heat is absorbed

Question 15

What is latent heat?

Answer 15

The energy required for evaporation or sublimation is called latent heat

Question 16

What layer is above the troposphere?

Answer 16

tropopause

Question 17

What is the temperature like in the tropopause?

Answer 17

The temperature remains roughly constant

Question 18

Does convection stop in the tropopause?

Answer 18

Yes

Question 19

What layer is above the tropopause?

Answer 19

stratosphere

Question 20

How does temperature work in the stratosphere?

Answer 20

Temperature increase with increasing altitude

Question 21

What causes the increasing of temperature in the stratosphere?

Answer 21

It is mainly due to the radiation from the sun entering the atmosphere above

Question 22

What is precipitation?

Answer 22

Is the name given to any liquid or solid that falls from a cloud and reaches the floor

Question 23

At what diameter is water droplets considered to be raining?

Answer 23

0.5mm or larger

Question 24

How much does the temperature change with altitude?

Answer 24

Atmospheric temperature decreases approximately 6 °C per 1000 m of altitude.

Question 25

condensation nuclei

Answer 25

Is a very small called cloud particle which is the seed of a nuclei, on which water vapor condenses

Question 26

freezing nuclei

Answer 26

solid particles can promote the formation of ice crystals from water droplets

Question 27

What is supercooled?

Answer 27

A substance that is liquid at a temperature below its normal freezing temperature is said to be supercooled