Sms 8th Grade Science Eog Review

13 Questions  I  By Mrmorrow
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 Sms 8th Grade Science Eog Review
This is an NC 8th grade EOG review quiz. )

  
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Questions and Answers

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  • 1. 
    Which event will lead to the greatest reduction of dissolved oxygen in a lake?
    • A. 

      Decreased number of fish in the lake

    • B. 

      Increased nutrients and algal blooms

    • C. 

      Increased number of fish in the lake

    • D. 

      Decreased number of plants surrounding the lake


  • 2. 
    Which may result from increased recreational water activities on a lake?
    • A. 

      The turbidity of the lake may decrease

    • B. 

      The number of fish and other aquatic life may increase.

    • C. 

      The water quality of the lake may decrease.

    • D. 

      The amount of dissolved oxygen in the lake may increase.


  • 3. 
    Which would most greatly affect the health of fish in a local pond?
    • A. 

      The daily release of hot water into the pond from a local factory.

    • B. 

      A hurricane temporarily stirring up water and sediments in the pond.

    • C. 

      The occasional release of sediments into the pond from a nearby field.

    • D. 

      A small increase in the number of fishers who use the pond for food.


  • 4. 
     A scientist chemically combines 25 grams of hydrogen with 50 grams of oxygen to form water. After the chemical reaction is complete, there are only 72 grams of water. Which best explains why the total mass is reduced?
    • A. 

      Some of the water evaporated

    • B. 

      Oxygen has less mass when it is combined in a compound.

    • C. 

      When water combines, some of the mass is changed into heat.

    • D. 

      Hydrogen has less mass when it is combined in a compound.


  • 5. 
    A rock sample has 25% of its original radioactive element and the half-life of the element is 1 million years. How old is the sample?
    • A. 

      500,000 years old

    • B. 

      1 million years old

    • C. 

      2 million years old

    • D. 

      3 million years old


  • 6. 
    In what type of rock is an index fossil most likely to be found?
    • A. 

      Sedimentary

    • B. 

      Igneous

    • C. 

      Metamorphic

    • D. 

      Volcanic


  • 7. 
    Which animal cell organelle uses oxygen to release the energy stored in glucose?
    • A. 

      Mitochondrion

    • B. 

      Golgi Apparatus

    • C. 

      Endoplasmic reticulum

    • D. 

      Ribosome


  • 8. 
    Which is the relationship between flagella and cilia in animal cells?
    • A. 

      They are both structures used in reproduction.

    • B. 

      They are both structures used in digestion.

    • C. 

      They are both structures used in circulation.

    • D. 

      They are both structures used in movement.


  • 9. 

    Which can be easily determined by studying the periodic table of elements?
    • A. 

      Carbon (C) is a gas.

    • B. 

      Radon (Rn) is a metal.

    • C. 

      Fluorine (F) is a liquid.

    • D. 

      Francium (Fr) is a metal.


  • 10. 

    Which best describes elements that have similar chemical properties?
    • A. 

      In a row

    • B. 

      In a line

    • C. 

      In a group

    • D. 

      In a period


  • 11. 

    How can the element Carbon (C) be classified?
    • A. 

      A transition metal

    • B. 

      A nonmetal

    • C. 

      A metalloid

    • D. 

      Metal


  • 12. 

    How are elements organized in the periodic table?
    • A. 

      By increasing atomic mass

    • B. 

      By decreasing atomic mass

    • C. 

      By increasing atomic number

    • D. 

      By decreasing atomic number


  • 13. 

    Which group has the most reactive metals?
    • A. 

      Group 1

    • B. 

      Group 18

    • C. 

      Group 4

    • D. 

      Group 13


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