1. What mammal lays eggs?

2. What is another name for the Paleolithic Age?

3. Used primarily in fertilizers, which element is never found free in nature even though it makes up about 2.5% of the earth's crust?

4. What invention in about 1450 A.D. revolutionized communication and
the world?

5. Most commercial nuclear power plants worldwide are cooled by

6. How many time zones are there on Earth?

7. Which continent has the largest KNOWN deposits of coal?

8. The only species of cat that lives and hunts in groups is

9. What land mammal holds the record for the greatest age?

10. Who is known as the Father of the Atomic Bomb?

11. The science of weights and measures is called:

12. The study of poisons is called:

13. What country currently has the third largest number of satellites in
orbit?

14. The branch of medical science which is concerned with the study of
disease as it affects a community of people is called:

15. What month is showing on the calendar when the Earth is nearest the
sun?

16. The word atom is from a Greek word meaning:

17. The first animal launched into orbit was a:

18. What compound is a common component of air pollution, but is
essential in the upper atmosphere to protect life on earth?

19. The sun makes up approximately what percent of matter in our solar
system?

20. What is the better known name for the deadly poison prussic acid?

21. What is the name for the new technology whereby a glass fiber carries
as much information as hundreds of copper wires?

22. Identify the Earth's largest INVERTEBRATE animal.

23. Name the first woman to travel in space.

24. Which of the following is considered a renewable resource?

25. What is the formula of water