Matter, minerals, and rocks I need homework help?

This is my last one for now I promise. If I got any wrong tell me the num# and correct answer please. (MY ANSWERS ARE AT THE BOTTOM)


1. Early sailors discovered a gradual change in position of the North Star. This discovery helped to prove that


A. Earth is round.


B. Earth is flat at its poles.


C. Earth rotates on its axis.


D. Earth is approximately 40,074 kilometers in circumference.





2. A topographic map is one that


A. is not drawn to scale.


B. shows only part of the Earth.


C. shows the highs and lows of the land surface.


D. distorts distance and directions.





3. The smallest particle of an element that retains the chemical identity of that element is a/an


A. compound.


B. mixture.


C. molecule.


D. atom.





4. Which one of the following statements accurately describes a theory?


A. It's a suggested answer to a question.


B. It can be changed when new discoveries are made.


C. It can't be reproduced many times.


D. It represents the end of the scientific process.





5. Mohs' scale helps scientists to identify the _______ of a mineral.


A. crystal shape


B. hardness


C. color


D. cleavage





6. Marble is a type of _______ rock.


A. igneous


B. metamorphic


C. molten


D. sedimentary





7. Which of the following would be studied by a geologist?


A. The composition of a mineral


B. The climate of a particular area


C. The tides of the oceans


D. The methods used to protect the environment





8. Which one of the following objects will have the greatest force of gravity to the Earth at its surface?


A. A large book


B. A house


C. A human being


D. An average-size car





9. Which one of the following words best describes the term gradient?


A. Oblate


B. Slope


C. Weight


D. Contour





10. Which one of the following statements is characteristic of liquid water?


A. It has a definite volume but not a definite shape.


B. It has a definite volume and a definite shape.


C. It has a definite shape but not a definite volume.


D. It has neither a definite shapre nor a definite volume.





11. Which one of the following is a kind of organic sedimentary rock formed from the decayed remains of plants?


A. Sandstone


B. Limestone


C. Shale


D. Coal





12. One way to help identify a mineral is to rub it against a piece of porcelain tile. This procedure tests the _______ of the mineral.


A. streak


B. hardness


C. luster


D. cleavage





13. Which one of the following statements represents a qualitative observation?


A. The stratosphere begins 40 kilometers above the surface of Earth.


B. The circumference of Earth is 40,074 kilometers.


C. The sun is larger than Earth.


D. The distance between two lines of latitude is approximately 112 kilometers.





14. To describe a distance north or south of the equator, scientists use


A. lines of latitude.


B. the prime meridian.


C. projection maps.


D. contour lines.





15. In which subdivision of Earth will you find bodies of water, such as lakes and ponds?


A. Lithosphere


B. Troposhpere


C. Hydrosphere


D. Stratosphere





16. The tendency of a mineral to break along flat surfaces is referred to as


A. cleavage.


B. hardness.


C. streak.


D. fracture.





17. Fossils are found mainly in _______ rock.


A. intrusive igneous


B. metamorphic


C. extrusive igneous


D. sedimentary





18. The prefix that means 100 times is


A. mega.


B. kilo.


C. centi.


D. hecto.





19. What is unique about the biosphere?


A. It's the only sphere that contains water.


B. It's the coldest of all the spheres.


C. It's the only sphere that doesn't support life.


D. It exists entirely within the other spheres.





20. Why is coal not considered to be a mineral?


A. Coal is a manufactured product.


B. Coal is not inorganic.


C. Coal can exist in liquid form.


D. Coal doesn't have a definite chemical composition.





(1)C (2)C (3)D (4)B (5)B (6)B (7)A (8)B (9)B (10)A (11)D (12)B (13)C (14)A OR C? (15)C (16)A (17)D (18)D? (19)D (20)B

Matter, minerals, and rocks I need homework help?
#18 is C


#20 is A
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