Name: ______Period: ______Score: ______/38
Kids Discover Magazine – Cells
Instructions: Read pages 2-5 and page 17 in Kids Discover - Cells. Use the information to answer the questions below.
1. Usually cells can only be seen through a ______.
2-3. The most common atoms are ______, hydrogen, nitrogen, and ______.
4. ______are atoms that are bonded together.
5. ______are the most basic units of life.
6. If an atom were the size of a pea, one cell would be the size of a ______.
7. Creatures made up of one cell are ______.
8. An ______is a unicellular organism that constantly changes shape.
9. Slime molds are a ______of cells working together.
10-11. Plants have specialized cells for transporting ______and ______.
12-17. List the 6 categories of specialized cells in humans: ______, ______, ______, ______, ______, and ______.
18. Creatures made up of two or more cells are ______.
19. Groups of similar cells form ______.
20-21. Tissues make up ______, such as the heart and ______.
21-22. An English scientist named Robert ______named cells when he looked at a thin slice of ______through a microscope.
23. The word cell comes from the Latin word cella, meaning ______.
24. The ______is the cell’s control center, or brain.
25. The cell membrane is made of a double layer of fatty material called ______.
26. A ______is used for storing fat and other substances.
27. The word organelle means “______.”
28-29. Plants use the sun’s light energy to combine carbon dioxide and water to make ______in a process called ______.
30. The ______produces energy for the cell to use by breaking down substances.
31. ______makes up 90% of a cell’s weight.
32. About half the stuff in your body is made of ______.
33-34. ______cells can change into other types of cells. This ability allows them to act as a ______system for the body.
35. Cells from an embryo can produce ______kinds of human cells.
36. The life span of red blood cells is about ______days.
37. The life span of bone cells is about ______years.
38. Scientists are looking for ways to control cell death so they can kill off harmful cells such as ______.
39-40. What 2 diseases can stem cell research possibly one day help to cure? ______and ______