Video Questions to Accompany:

Invisible World

1. What sense is our primary link with the world?

2. Which species has the most developed eyes?

3. We can see how many colors?

4. What is the resolution of our eye, i.e, we can see things that are how small?

5. a) When were plankton discovered?
b) What about bacteria?

6. What does it mean to say crystals "grow"?

7. What type of microscope uses an electron beam to magnify things?

8. Pollen grains are visible at what magnification?

9. At a magnification of 50 000 X, an egg would seem to be how tall?

10. a) What is the primary food source for dust mites?
b) They look like miniature versions of what creatures?

11. What type of life grows on our hair?

12. A head louse spends all its time where?

13. What causes the physical effects of scabies?

14. A single bacterium can multiply into a million cells in what time span?

15. A person carries approximately how many bugs on their skin?

16. a) What is the diameter of a uranium atom?
b) At a magnification of 10 million, they showed what unexpected behavior?

17. a) What was Edward Mybridge's favorite area of investigation?
b) He created the first photographic analysis of the dynamics of what?

18. a) Slow motion is a way of analysing what?
b) It can easily show incorrect technique in sports. T, F.

19. a) What device did Dr. Harold Edgerton invent to "slow" motion?
b) "Stretching" events reveal what?

20. If slow motion slows rapid events, what photographic technique speeds up slow events?

21. a) Grubs consume an apple in what time?
b) What consumed the dead mouse in what time?

22. The person is shown aging from childhood to young adult and back in what time?

23. a) Bees can see what "invisible" type of energy?
b) To bees, flowers look much the same as we see them. T, F.

24. Infrared images reveal what type of energy?

25. Who is the most famous Pharaoh?

26. High frequency sound can reveal what that is invisible to X-rays?

27. Electrophotography suggests objects are surrounded by what?

28. a) The Fermi National Accelerator Lab is searching for what subatomic particles?
b) The high energy beam is controlled by what?

29. a) Galaxies were just a hypothesis how long ago?
b) There are about how many of them?
c) Each may contain how many stars?

30. Where in the brain is our cerebral cortex located?