Mid Year 8th Grade Science Exam

100 Questions | Total Attempts: 42

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Mid Year 8th Grade Science Exam

High Point Academy-Mr. Zrinski


Questions and Answers
  • 1. 
    How many chemical bonds can each carbon atom form?
    • A. 

      One

    • B. 

      Two

    • C. 

      Three

    • D. 

      Four

  • 2. 
    A metal washer has a mass of 0.27g and a volume of 0.1 cubic centimeters. What is its density?
    • A. 

      0.027 g/cubic centimeter

    • B. 

      0.037 g/cubic centimeter

    • C. 

      2.7 g/cubic centimeter

    • D. 

      2.7 g/square centimeter

  • 3. 
    Electrons involved in bonding between atoms are...
    • A. 

      Valence electrons.

    • B. 

      Inside the nucleus.

    • C. 

      Closest to the nucleus.

    • D. 

      Positively charged.

  • 4. 
    Normal rainfall is slightly acidic, which means its pH must be...
    • A. 

      Less than 2.

    • B. 

      Between 5-7.

    • C. 

      Between 2-4.

    • D. 

      Between 7-9.

  • 5. 
    Explaining or interpreting the things you observe based on reasoning from what you already know is called...
    • A. 

      Observing

    • B. 

      Inferring

    • C. 

      Predicting

    • D. 

      Classifying

  • 6. 
    The first step in designing or redesigning a product is...
    • A. 

      Thinking about ways to solve the problem.

    • B. 

      Deciding what needs you are trying to meet.

    • C. 

      Building a prototype.

    • D. 

      Fully researching the problem.

  • 7. 
    If you heat a liquid and measure the temperature at which it boils, you are measuring a(n)...
    • A. 

      Atomic property

    • B. 

      Physical property

    • C. 

      Chemical property

    • D. 

      Molecular property

  • 8. 
    If a shoe box measures 6 cm high, 7 cm wide, and 20 cm long, what is its volume?
    • A. 

      420 centimeters

    • B. 

      420 cubic centimeters

    • C. 

      840 cubic centimeters

    • D. 

      840 centimeters

  • 9. 
    In a water solution, how do acids differ from bases?
    • A. 

      Acids form hydrogen ions, while bases form hydroxide ions.

    • B. 

      Acids turn litmus blue, while bases turn litmus red.

    • C. 

      Acids form salts, but bases do not.

    • D. 

      Hydrogen ions remain dissolved, but hydroxide ions do not.

  • 10. 
    A line graph shows...
    • A. 

      Changes in the responding variable only

    • B. 

      Changes in the manipulated variable only

    • C. 

      How the responding variable changes in response to the manipulated variable.

    • D. 

      How the manipulated variable changes on its own.

  • 11. 
    A well-tested explanation for a wide range of observations or experimental results is called a scientific...
    • A. 

      Inquiry.

    • B. 

      Hypothesis.

    • C. 

      Theory.

    • D. 

      Law.

  • 12. 
    What holds atoms together in a molecule?
    • A. 

      Density.

    • B. 

      Gravity.

    • C. 

      Physical bonds.

    • D. 

      Chemical bonds.

  • 13. 
    The number placed below an element's symbol in a chemical formula is called a ...
    • A. 

      Subscript

    • B. 

      Coefficient

    • C. 

      Reactant

    • D. 

      Product

  • 14. 
    One example of a chemical change is...
    • A. 

      Filtering.

    • B. 

      Burning wood.

    • C. 

      Boiling water.

    • D. 

      Crushing a can.

  • 15. 
    You can find the pH of a substance by using...
    • A. 

      Plain paper

    • B. 

      A thermometer.

    • C. 

      Litmus indicator.

    • D. 

      A conductivity tester.

  • 16. 
    What is the goal of technology?
    • A. 

      To produce and deliver cereal.

    • B. 

      To understand how the natural world functions.

    • C. 

      To study the natural world.

    • D. 

      To improve the way people live.

  • 17. 
    Fireworks exploding in the sky and giving off light are an example of a(n)..
    • A. 

      Endothermic change.

    • B. 

      Exothermic change.

    • C. 

      Physical change.

    • D. 

      Change in mass.

  • 18. 
    Which parts of the atom move around the nucleus?
    • A. 

      Atomic mass units

    • B. 

      Electrons

    • C. 

      Protons

    • D. 

      Neutrons

  • 19. 
    Which particles in an atom are in the nucleus?
    • A. 

      Protons and neutrons

    • B. 

      Protons and electrons

    • C. 

      Protons and ions

    • D. 

      Electrons and neutrons

  • 20. 
    When scientists put things into categories or group together items that are alike in some way, they are ....
    • A. 

      Inferring

    • B. 

      Predicting

    • C. 

      Classifying

    • D. 

      Making models

  • 21. 
    Table sugar and table salt are examples of 
    • A. 

      Atoms.

    • B. 

      Elements.

    • C. 

      Mixtures.

    • D. 

      Pure substances.

  • 22. 
    The volume of an irregular object can be measured by...
    • A. 

      Multiplying the object's length, width and height.

    • B. 

      Dividing the object's density by its mass.

    • C. 

      Submerging the object in water in a graduated cylinder.

    • D. 

      Placing the object on a triple-beam balance.

  • 23. 
    What is a double bond?
    • A. 

      A bond between two atoms.

    • B. 

      One pair of electrons shared between two atoms.

    • C. 

      Two pairs of electrons shared between two atoms.

    • D. 

      Two pairs of electrons shared between four atoms.

  • 24. 
    What happens when chemical bonds break and new bonds form?
    • A. 

      A physical change

    • B. 

      A chemical reaction

    • C. 

      Matter is destroyed

    • D. 

      Surface area increases

  • 25. 
    Which is a likely use for a base?
    • A. 

      As a vitamin in your food

    • B. 

      Etching metals for printing

    • C. 

      Making foods taste sour

    • D. 

      Making soaps and detergents

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