Science Olympiad Miscellaneous Worksheet-25

Science Olympiad Miscellaneous Worksheet-25

Fill in the Blanks.

1. What is a mixture of broken-down rocks and decomposed plants and animals called?

2. What kind of simple machine is a wheelchair ramp?

3. What is the inner most region of the earth called?

True or False.

4. When salt water evaporates, it takes the salt from the ocean with it.

5. Changing some of the metals that make up a complex polymer would probably result in a compound with different chemical properties.

6. Two or more substances may be combined to produce a new material with different properties. This new material is called a plastic.

7. A satellite in geosynchronous orbit revolves around Earth once each day.

8. The number of valence electrons in an atom of an element determines many properties of the element, including the ways in which the atom can bond with other atoms.

Multiple Choice Question.

9. The presence of the same _________ on different continents are evidence for continental drift.

(a) Fossils                                      (b) wind systems

(c) river systems                           (d) weather patterns

10. Why does the Red Sea look red?

(a) It absorbs red color from the sun

(b) Because the water is so hot

(c) Because of red algae that live in this sea

11. If a species can adapt to a changing environment, or ________, its descendants will survive.

(a) become extinct                       (b) stay the same

(c) Evolve                                       (d) none of these

12. Quarks are held together by:

(a) Tapeons       (b) Mesons        (c) Gluons          (d) nucleons

Answer Key:

1. Soil

2. Incline

3. Core

4. False

5. False

6. False

7. True

8. True

9. (a)

10. (c)

11. (c)

12. (c)