1. Plants need inputs to grow
2. Growing plants without soil
Week 3 - The environment has an effect on all living things
Week 4 - Chemical and Physical reactions
Week 5 - Introduction to Light
6. Energy
7. Growing Peas
8. Heat and Energy
9. Corn

How can you figure out pH?

Well the best way is to witness a chemical reaction. Chemical reactions have some pretty tell tale signs. They are different from physical changes but sometimes it can be a little tricky to see how.

Most physical changes are reversible, if you melt ice into water you can refreeze it.
Most chemical changes are irreversible, if you burn wood you cannot change the ash back into wood.