Down |
1. | not the same as a planet but it does orbit the sun; made of dust and ice |
2. | increase in concentration of a chemical as it moves up the food chain (e.g. the reason you should not eat too much tuna or shark meat) |
4. | this kind of variable is held the same for each trial, it is called a "control" |
5. | abbreviation of "parts per million" |
7. | this is what happens to energy when it changes form, like chemical to thermal |
9. | allowing space junk to accumulate in outer space raises concerns of this type |
10. | the distance it takes light to travel in one year (two words) |
13. | rockets use chemicals for this |
15. | this is what you have to multiply by if you are converting from volts to millivolts, or any unit to "milli-" units (two words) |
17. | reducing the concentration of a solute in solution, usually by adding water |
19. | ours has eight planets orbiting around the Sun (two words) |
21. | tiny component that works like a switch in a tiny circuit (microcircuit) |
23. | these types of telescope use visible light, make good clear pictures but can only be used in daytime in good weather |
25. | SO2; major air pollutant that forms smog and acid rain (two words) |
30. | this is the variable that we watch to see what happens, when we change or manipulate something else |
31. | this effect has to do with certain gases, like carbon dioxide, trapping heat in the Earth's atmosphere |
32. | the name of the galaxy that our Sun and solar system belong to (two words) |
34. | the Sun is called a "main sequence" one of these |
35. | name of a famous rock band, taken from electricity: "alternating current -- direct current" |
38. | variable resistor, like a dimmer switch |
41. | the Sun is mostly made of this element, and converts it to helium by nuclear fusion |
43. | this effect refers to the apparent change in frequency of a wave as the observer and wave source are moving (e.g. how a siren changes pitch as it passes you) |
46. | testing on animals raises concerns and questions of this type |