SCIENCE

2. This structure, found in cells, assembles proteins.
5. The breaking down of rocks on the earth's surface is ____
8. The longest phase of the cell cycle is______
10. This is the structure in plant cells that captures the sun's energy and changes it into chemical energy.
12. 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?
15. Which area of Earth science includes the study of stars?
17. On the Periodic Table, elements that are in the same vertical column are considered to be in the same_____
20. What is the hormone responsible for causing sudden emotional changes and sexual feelings that occur in males during puberty?

1. A species in danger of becoming extinct in the near future is referred to as a(an)_________species.
3. Which subatomic particle is NOT found in the nucleus of an atom?
4. 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?
6. On the Periodic Table, all elements that are in the same horizontal rows are considered to be in the same ____
7. ____are often slippery substances that are used for cleaning.
9. Which subatomic particle has a positive charge?
11. Which term refers to the number of protons in an atom and helps to place elements on the Periodic Table?
13. In addition to food, what else does a mitochondrion need to release energy?
14. The outer layers of plants, fungi and some protist cells which support and protect the cell are called the _____
16. Which organelle contains nearly all of a eukaryotic cell's DNA?
18. If fish are caught faster than they can breed, what will happen to the population?
19. Which of the following nutrients is used to build and repair cells?
21. The study of interactions between organisms and their environment is called_____