SCIENCE

2. The breaking down of rocks on the earth's surface is _____
4. What day is it when the sun is at its lowest elevation in the sky all year and we experience the shortest day of the year?
7. Which subatomic particle has a positive charge?
8. On the Periodic Table, all elements that are in the same horizontal rows are considered to be in the same ______
9. Which area of Earth science includes the study of stars?
10. Which organelle contains nearly all of a eukaryotic cell's DNA?
11. A species in danger of becoming extinct in the near future is referred to as a(an)_____ species.
12. If fish are caught faster than they can breed, what will happen to the population?
13. This structure, found in cells, assembles proteins.
15. In addition to food, what else does a mitochondrion need to release energy?
16. On the Periodic Table, elements that are in the same vertical column are considered to be in the same_____

1. What is the hormone responsible for causing sudden emotional changes and sexual feelings that occur in males during puberty?
3. Which term refers to the number of protons in an atom and helps to place elements on the Periodic Table?
5. The longest phase of the cell cycle is ______
6. 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?
7. Which of the following nutrients is used to build and repair cells?
11. Which subatomic particle is NOT found in the nucleus of an atom?
14. The study of interactions between organisms and their environment is called_____