CHEMICAL/ENERGY!!

3. alfred noble's famous invention.
4. opposite of release, taking in a substance
6. a weak acid-base method used to get an idea of the pH scale of a chemical
7. the basic unit of a chemical element, such particles as a source of nuclear energy.
9. chemical reactions that release energy such as a wood burning (releases carbon, heat, water and energy.)
10. has the pH scale equal to 7 (7.2)
13. the process by which green plants use sunlight to synthesise foods from carbon dioxide and water.
15. a substance that will destroy and damage other substances when they come into contact with one another.
17. source of energy for all ecosystems on Earth
18. regular bases can't be dissolved while ______ can be dissolved
19. A substance that can react with an acid to form a salt and water, has a pH scale greater than 7.2

1. a chemical substance that has the pH scale less than 7.2
2. the substance that goes into the reactor.
5. physical substance that which occupies space and possesses rest mass.
8. a green pigment, present in all green plants, responsible for the absorption of light to provide energy for photosynthesis.
9. when energy is absorbed from the surrounding substances such as an ice pack.
11. can't be dissolved.
12. the quality of being hot, high in temperature
13. a result of a reaction.
14. opposite of absorbing, letting go
16. can be dissolved.