1.b
100

what is thermal energy 

the total kinetic energy (motion)of all the tiny atoms and molecules inside a substance 

200

an example of conduction  

ironing clothes 

300

 How do convection currents form in boiling water?

thermal energy changes the destiny of the water creating a continuous loop of rising warm fluid and sinking cool fluids 

400

Describe a real-world scenario where radiation is the primary method of heat transfer.

sunlight warming the earth through the vacuum of space