Grade 9: ask at least two people who are about 15 years older than you, if they believe Climate Change is really happening, and what evidence do they have for this. Make a note of their responses, and decide for yourself if their reasons are subjective or objective.
Grade 8: Learn the pH scale (1,red acid; 7,green, neutral; 14 purple, alkali)
You do not have to know every single colour but those I have listed will give you the pattern.
