Questions | Answers |
what 3 ways do objests become charged? | Friction, contact, induction |
what did Ruthorfurd conclude about gold foil experiment? | cell contain postive nucleus, and cell has electron cloud |
what properties of aluminum make it useful for making food? | it is malleable and has a high melting point |
How many electrons are in a full outer electron shell of Bohr-Rutherford model? | Eight |
Characteristic of alpha particle | 4x mass of proton with 2x the positive charge. Made of matter |
Characteristic of Beta particle | Same mass as electron with the same amount of negative charge, made of matter |
Characteristic of gamma rays | No mass or charge. Made of energy. |
Why are atomic masses in decimals? | It is the ratio of all the isotope masses of that element |
What is another name for static electricity? | Electrostatics |
What causes lightning? | Collisions of water droplets, strip electrons off clouds and put the on others. The negative clouds induce a negative charge on the ground. The strong attraction b/w the ground and the cloud pulls electron off water molecules. Discharge occurs thro ions |
Why is static more common in winter? | The air is more dryer (insulator) and doesn't pick up the charge as the constantly collide against you. |
What is the cell theory? | 1-All organisms are made of cells. 2Cells come fr. other cells 3-Cells are basic unit of function&structure.4-activity of organism depends on cell activity |
What are the difference between plant and animal cell? | Plant cells have chlorplasts and a cell wall. Animal cells have many small vacuoles and the plant cell has one large one. |
What are the four stages of mitosis? | Prophase, Metaphase, Anaphase, Telophase |
What is the reproductive organ of a female in a plant? Male? | Female=Pistil . Male = Stamen |
What is the difference between Angiosperm and Gymnosperm? | The seeds of angiosperm is found in a flower and the seeds of gymnosperm are found in cones. |