Mid Year 8th Grade Science Exam

100 Questions | Attempts: 42
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    One useful tool that may help a scientist interpret data by revealing unexpected patterns is a ....

    • Variable
    • Graph
    • Theory
    • Law
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About This Quiz

High Point Academy-Mr. Zrinski

Mid Year 8th Grade Science Exam - Quiz

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  • 2. 

    What is the greatest number of valence electrons an atom can have?

    • 2

    • 3

    • 8

    • 12

    Correct Answer
    A. 8
  • 3. 

    During an experiment, which factors must be controlled so that researchers can draw a logical conclusion from the experiment?

    • Variables

    • Operational definitions

    • Inquiries

    • Theories

    Correct Answer
    A. Variables
  • 4. 

    When scientists create a representation of a complex process, they are ....

    • Inferring

    • Predicting

    • Classifying

    • Making models

    Correct Answer
    A. Making models
  • 5. 

    During an experiment, if you purposely change the temperature to test a hypothesis, the temperature is called the...

    • Manipulated variable.

    • Responding variable.

    • Operational variable.

    • Dependent variable.

    Correct Answer
    A. Manipulated variable.
  • 6. 

    The energy of matter in motion is called....

    • Kinetic energy

    • Potential energy

    • Chemical energy

    • Electromagnetic energy

    Correct Answer
    A. Kinetic energy
  • 7. 

    A group of parts that work together is called a ...

    • Technology

    • System

    • Process

    • Feedback

    Correct Answer
    A. System
  • 8. 

    Prototypes are used to ....

    • Patent an invention.

    • Test the operation of a product.

    • Identify a need.

    • Research a problem.

    Correct Answer
    A. Test the operation of a product.
  • 9. 

    How would you calculate the density of an object?

    • Divide its weight by its volume.

    • Divide its mass by its volume.

    • Multiply its volume times its mass.

    • Multiply its weight times its mass.

    Correct Answer
    A. Divide its mass by its volume.
  • 10. 

    Choose Option 1-Free Gift

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 1
  • 11. 

    How many meters are there in a kilometer?

    • 10

    • 100

    • 1000

    • 10,000

    Correct Answer
    A. 1000
  • 12. 

    What is the first thing you should do if an accident occurs?

    • Find the emergency equipment.

    • Notify the teacher.

    • Go to the nearest hospital.

    • Start first aid treatment.

    Correct Answer
    A. Notify the teacher.
  • 13. 

    Which of the following is a valid reason why a scientist might reject a scientific theory?

    • Some people disagree with it.

    • It covers too broad a topic.

    • New evidence contradicts it.

    • It is too old.

    Correct Answer
    A. New evidence contradicts it.
  • 14. 

    In the laboratory, volumes of liquid are usually measured with a(n).....

    • Electrode

    • Scale

    • Triple beam balance

    • Graduated cylinder

    Correct Answer
    A. Graduated cylinder
  • 15. 

    Acids are described as corrosive because they....

    • Turn litmus blue

    • Taste bitter.

    • "eat away" at other materials.

    • Feel slippery

    Correct Answer
    A. "eat away" at other materials.
  • 16. 

    Anything that has mass and takes up space is called...

    • Matter

    • Energy

    • Heterogeneous

    • Homogeneous

    Correct Answer
    A. Matter
  • 17. 

    An engineer is a.....

    • Legal document issued by a government that gives an inventor exclusive rights to make, use, or sell an invention for a limited time.

    • Person who studies plants.

    • Person trained to use both technological and scientific knowledge to solve practical problems.

    • Possible explanation for a set of observations or answer to a scientific question.

    Correct Answer
    A. Person trained to use both technological and scientific knowledge to solve practical problems.
  • 18. 

    A chemical reaction that absorbs energy in the form of heat is described as

    • Endothermic

    • Exothermic

    • Combustion

    • Unbalanced

    Correct Answer
    A. Endothermic
  • 19. 

    Ions that are made of more than one atom are examples of ....

    • Polyatomic ions

    • Negative ions

    • Positive ions.

    • Neutral ions.

    Correct Answer
    A. Polyatomic ions
  • 20. 

    A summary of what you have learned from a scientific experiment is called a(n)....

    • Hypothesis

    • Inquiry

    • Conclusion

    • Law

    Correct Answer
    A. Conclusion
  • 21. 

    From an element's location in the periodic table, you can predict...

    • Its properties.

    • Its chemical name.

    • Its chemical symbol.

    • When it was discovered.

    Correct Answer
    A. Its properties.
  • 22. 

    The metric system of measurement is based on the number ....

    • 1

    • 10

    • 12

    • 100

    Correct Answer
    A. 10
  • 23. 

    Chemistry is....

    • A characteristic of a substance that can be observed without changing the substance into another substance.

    • The study of matter and how matter changes.

    • Anything that has mass and takes up space.

    • A rapid reaction between oxygen and a substance called a fuel.

    Correct Answer
    A. The study of matter and how matter changes.
  • 24. 

    Which of these statements about a column of the periodic table is true?

    • The elements have similar properties.

    • The elements have a wide range of properties.

    • The elements have the same atomic number.

    • The elements have the same atomic mass.

    Correct Answer
    A. The elements have similar properties.
  • 25. 

    An ionic bond is the attraction between....

    • Similarly charged ions.

    • Oppositely charged ions.

    • Neutral ions.

    • Neutral atoms.

    Correct Answer
    A. Oppositely charged ions.
  • 26. 

    The measurement of how much mass is contained in a given volume is called...

    • Weight

    • Melting point

    • Boiling point

    • Density

    Correct Answer
    A. Density
  • 27. 

    Which is a characteristic property of acids?

    • They turn blue litmus paper red.

    • They turn red litmus paper blue.

    • They taste bitter.

    • They do not react with metals.

    Correct Answer
    A. They turn blue litmus paper red.
  • 28. 

    Because atoms are so small.....

    • Scientists create models to describe them.

    • They can not be made of smaller particles.

    • There is no way to describe them.

    • They cannot be synthesized by scientists.

    Correct Answer
    A. Scientists create models to describe them.
  • 29. 

    CaCO3  represents a chemical….. 

    • Symbol

    • Formula

    • Subscript

    • Reaction

    Correct Answer
    A. Formula
  • 30. 

    In the periodic table, the most reactive metals are found ....

    • In Group 1, the first column on the left.

    • In Period 1, the first row across the top.

    • In Groups 13 through 16 in the center.

    • In Periods 6 and 7 at the bottom.

    Correct Answer
    A. In Group 1, the first column on the left.
  • 31. 

    Observations that deal with a number or amount are called...

    • Manipulated observations.

    • Quantitative observations.

    • Qualitative observations.

    • Operational observations.

    Correct Answer
    A. Quantitative observations.
  • 32. 

    What is the chemical name for the compound with the formula Na2 S ?

    • Sodium fluoride

    • Magnesium sulfide

    • Lithium oxide

    • Sodium sulfide

    Correct Answer
    A. Sodium sulfide
  • 33. 

    The density of a block of wood with a volume of 50 cubic centimeters and a mass of 100 grams is 

    • 2 g/cubic centimeter

    • 0.5 g/cubic centimeter

    • 500g/cubic centimeter

    • 5,000g/cubic centimeter

    Correct Answer
    A. 2 g/cubic centimeter
  • 34. 

    Which of the following is a characteristic property of ionic compounds?

    • They have low melting points.

    • They have low boiling points.

    • They form hard, brittle crystals with characteristic shapes.

    • They contain no charged particles.

    Correct Answer
    A. They form hard, brittle crystals with characteristic shapes.
  • 35. 

    When an atom loses an electron, it becomes a ....

    • Positive ion.

    • Negative ion.

    • Neutral ion.

    • Neutral atom.

    Correct Answer
    A. Positive ion.
  • 36. 

    Electrons involved in bonding between atoms are...

    • Valence electrons.

    • Inside the nucleus.

    • Closest to the nucleus.

    • Positively charged.

    Correct Answer
    A. Valence electrons.
  • 37. 

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

    • Observing

    • Inferring

    • Predicting

    • Classifying

    Correct Answer
    A. Inferring
  • 38. 

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

    • Atomic property

    • Physical property

    • Chemical property

    • Molecular property

    Correct Answer
    A. Physical property
  • 39. 

    One example of a chemical change is...

    • Filtering.

    • Burning wood.

    • Boiling water.

    • Crushing a can.

    Correct Answer
    A. Burning wood.
  • 40. 

    You can find the pH of a substance by using...

    • Plain paper

    • A thermometer.

    • Litmus indicator.

    • A conductivity tester.

    Correct Answer
    A. Litmus indicator.
  • 41. 

    What is the goal of technology?

    • To produce and deliver cereal.

    • To understand how the natural world functions.

    • To study the natural world.

    • To improve the way people live.

    Correct Answer
    A. To improve the way people live.
  • 42. 

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

    • Inferring

    • Predicting

    • Classifying

    • Making models

    Correct Answer
    A. Classifying
  • 43. 

    What happens when chemical bonds break and new bonds form?

    • A physical change

    • A chemical reaction

    • Matter is destroyed

    • Surface area increases

    Correct Answer
    A. A chemical reaction
  • 44. 

    Which of the following terms means that metals can be pulled into thin strands or wires. 

    • Polar

    • Alloy

    • Ductile

    • Malleable

    Correct Answer
    A. Ductile
  • 45. 

    Making a forecast of what will happen in the future based on past experience or evidence is called...

    • Observing

    • Inferring

    • Predicting

    • Classifying

    Correct Answer
    A. Predicting
  • 46. 

    How do liquid water, ice, and water vapor differ from each other?

    • They are different states of matter.

    • They are different compounds.

    • They are made of different kinds of molecules.

    • They are made of different kinds of atoms.

    Correct Answer
    A. They are different states of matter.
  • 47. 

    Which stage of the scientific process enables a scientist to check the work of other scientists?

    • Classifying

    • Concluding

    • Hypothesizing

    • Communicating

    Correct Answer
    A. Communicating
  • 48. 

    In science, a hypothesis must be

    • Correct

    • Manipulated

    • Controlled

    • Testable

    Correct Answer
    A. Testable
  • 49. 

    Soil, a salad, and sugar water are all examples of ....

    • Elements

    • Compounds

    • Mixtures

    • Atoms

    Correct Answer
    A. Mixtures

Quiz Review Timeline (Updated): Mar 22, 2022 +

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  • Current Version
  • Mar 22, 2022
    Quiz Edited by
    ProProfs Editorial Team
  • Jan 03, 2015
    Quiz Created by
    Colleen Zeiss
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