SCIENCE

5. On the Periodic Table, all elements that are in the same horizontal rows are considered to be in the same ______
9. Which subatomic particle has a positive charge?
10. What is the hormone responsible for causing sudden emotional changes and sexual feelings that occur in males during puberty?
12. The study of interactions between organisms and their environment is called_____
13. Which subatomic particle is NOT found in the nucleus of an atom?
14. In addition to food, what else does a mitochondrion need to release energy?

1. Which term refers to the number of protons in an atom and helps to place elements on the Periodic Table?
2. Which body system pumps and transports the blood to all parts of the body as well as supply oxygen and remove waste products from body tissues?
3. On the Periodic Table, elements that are in the same vertical column are considered to be in the same_____
4. Which of the following nutrients is used to build and repair cells?
6. This structure, found in cells, assembles proteins.
7. The breaking down of rocks on the earth's surface is _____
8. Which area of Earth science includes the study of stars?
11. A species in danger of becoming extinct in the near future is referred to as a(an)_____ species.