The sun heats Earth mainly through

Radiation

Explanation:

The sun heats Earth mainly through Radiation. When the sun's radiation reaches Earth, the molecules in the atmosphere warm up.

If you are making notes having irrelevant information when you are trying to frame your notes then then you should weed out any irrelevant information in your notes. If it’s not on topic, move it out of your note pile.After doing this, you should ask yourself if you have found out everything you need to know about a specific topic you are looking for. If not, you should continue researching for further information and gather the relevant information.