1. Weather dynamics
Day 2 – Heat
Science 10

2. Heat
Thermal energy: the energy of the average movement of the particles (atoms, ions, molecules) of a substance
Heat: transfer of thermal energy from one object to another.
Goes from high to low thermal energy

3. Heat transfer
There are 3 methods of heat transfer
conduction
convection
radiation
Song:

4. Conduction
Conduction: heat transfer through collisions between high and low energy particles
Usually with solids i.e. a pot on the stove or between a solid and a liquid/gas

5. Convection
Convection: heat transfer during which high energy particles rise.
Hot particles rise (because they are less dense)
Cold particles fall (because they are more dense)
This movement creates convection currents.
Usually with liquids and gases – Why not with solids?

6. Radiation Radiation: heat transfer through electromagnetic waves.
These waves transport energy through space and release it only when they interact with certain types of matter
No particles are necessary for this transfer

7. Types of Thermal Energy Transfer

9. The Earth’s Energy Budget
No life on Earth would be possible if all the Sun’s energy was absorbed by the biosphere (land, air, water) without losing any of it
Temperature would continue rising too high
The Earth radiates as much energy into space as it absorbs from the Sun
Radiation back into space = absorption from Sun

10. Heating Air
Solar radiation is the primary source of energy that heats soil and water.

13. Wind
Wind is created from unequal heating of air.

14. To Do
Day 2 Questions