Across
- 1. - the amount of energy that needs to absorb for a chemical reaction to start.
- 6. - reversible chemical reaction. However, no net changes in the amount of reactants and products occur.
- 9. - cell of the immune system and also known as leukocytes.
- 12. - an enzyme in saliva that breaks down starch into simple sugars.
- 13. - a substance that decrease activation energy and increase the rate of chemical reaction.
- 14. - lasting attractions between atoms, ions, or molecules that enable the formation of chemical compounds.
- 15. - substances that take part in and undergo change during the reactions.
- 17. - living things.
- 18. - substances that are formed as the result of chemical reactions.
- 19. - a measure of how acidic or basic water is.
- 20. - act as biological catalysts for chemical reactions in living things.
- 21. - polysaccharide that is made and stored by plants.
Down
- 2. - can restore the previous situation.
- 3. - reactants are converted to one or more different products.
- 4. the processor of the body that provides resistance to infection and toxin.
- 5. - bacteria, viruses, or other microorganisms that can cause diseases.
- 7. - a group of two or more atoms.
- 8. - The measure of the amount of a sub-component in a solution.
- 10. - monomers that make proteins.
- 11. - the specific reactants that an enzyme acts on
- 16. - a physical quantity that expresses hot and cold.