Science 8 Semester 1 Final

49 Questions | Total Attempts: 52

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Science 8 Semester 1 Final

Questions and Answers
  • 1. 
    Knowledge gained by observing the natural world is _____.
    • A. 

      Not part of physical science

    • B. 

      A theory

    • C. 

      Science

  • 2. 
    The first step in the Scientific Method is to _________.
    • A. 

      Test your hypothesis

    • B. 

      Create a hypothesis

    • C. 

      Make an observation

    • D. 

      Ask a question

  • 3. 
    A hypothesis is _________.
    • A. 

      All of the choices

    • B. 

      Created before you can perform an experiment

    • C. 

      A very important part of the Scientific Method

    • D. 

      An educated guess

  • 4. 
    Scientists often use these types of calculations to help them determine what kind of substance they are dealing with.
    • A. 

      Density

    • B. 

      Volume

    • C. 

      Weight

    • D. 

      Mass

  • 5. 
    Which of the following actions would involve both physical and chemical properties?
    • A. 

      Building a bridge that does not rust

    • B. 

      Removing a stain from a piece of clothing

    • C. 

      Chopping up vegetables

    • D. 

      Choosing clothing based on weather

  • 6. 
    A characteristic of a substance that can be observed without changing the substance is called a(n) _______.
    • A. 

      Physical property

    • B. 

      Constant property

    • C. 

      Essential property

    • D. 

      Chemical property

  • 7. 
    What is a measure of the gravitational force on an object called?
    • A. 

      Mass

    • B. 

      Weight

    • C. 

      Volume

    • D. 

      Matter

  • 8. 
    A scientist immerses an irregularly shaped object into a beaker of water and notes how far the water rises. What property of the object is the scientist measuring?
    • A. 

      Mass

    • B. 

      Density

    • C. 

      Weight

    • D. 

      Volume

  • 9. 
    When a candle is lit, the wick burns and the wax melts. These are examples of ________.
    • A. 

      Only chemical properties

    • B. 

      Neither chemical nor physical properties

    • C. 

      Only physical properties

    • D. 

      Both chemical and physical properties

  • 10. 
    The force that causes some liquids to form round drops is _______.
    • A. 

      Surface tension

    • B. 

      Melting

    • C. 

      Boiling

    • D. 

      Viscosity

  • 11. 
    When a chemical reaction between oxygen gas and hydrogen gas occurs _______.
    • A. 

      Oxygen atoms are lost

    • B. 

      Atoms in both substances are rearranged

    • C. 

      No chemical changes takes place

    • D. 

      No physical change takes place

  • 12. 
    When silica in the form of sand is melted into glass _______.
    • A. 

      A chemical reaction occurs

    • B. 

      No physical change takes place

    • C. 

      No new substances are formed

    • D. 

      A new substance is formed

  • 13. 
    The state of matter with a fixed shape and volume is a _____.
    • A. 

      Particle

    • B. 

      Gas

    • C. 

      Liquid

    • D. 

      Solid

  • 14. 
    Ammonia is a liquid at room temperature. Which of the following statements about the particles in the liquid is true? 
    • A. 

      They have no attraction toward one another.

    • B. 

      They have a weak attraction toward one another.

    • C. 

      They are tightly bound together.

    • D. 

      They have a rigid structure.

  • 15. 
    When a liquid freezes, the particles _______. 
    • A. 

      Break away from each other

    • B. 

      Move faster

    • C. 

      Slow down but still move in place

    • D. 

      Stop moving

  • 16. 
    Having a low viscosity means _______.
    • A. 

      The liquid forms very round drops

    • B. 

      The liquid forms very flat drops

    • C. 

      The liquid moves very slowly

    • D. 

      The liquid moves very quickly

  • 17. 
    Having low surface tension means _______.
    • A. 

      The liquid forms very round drops

    • B. 

      The liquid forms very flat drops

    • C. 

      The liquid moves very slowly

    • D. 

      The liquid moves very quickly

  • 18. 
    When elements form mixtures, the elements ________.
    • A. 

      Combine in a specific mass ratio

    • B. 

      React to form a new substance with new properties

    • C. 

      Always change their physical state

    • D. 

      Keep their original properties

  • 19. 
    How could a sugar cube be dissolved more quickly in water?
    • A. 

      Add more water.

    • B. 

      Crush the sugar cube.

    • C. 

      Cool the water.

    • D. 

      Let the cube sit in the water.

  • 20. 
    What is an object that appears to stay in place and that helps you detect motion in another object?
    • A. 

      An increase in velocity

    • B. 

      A black whole

    • C. 

      A reference point

    • D. 

      A Newton

  • 21. 
    To calculate an object’s average acceleration, you need to know ________.
    • A. 

      Average speed, distance, and the time it takes to change velocity

    • B. 

      Starting velocity, final velocity, and time it takes to change velocity

    • C. 

      Starting point, endpoint, and the object’s mass

    • D. 

      Starting velocity, distance traveled, and speed

  • 22. 
    The gravitational pull is greater between two objects that ________.
    • A. 

      Are moving at greater speed

    • B. 

      Are farther apart

    • C. 

      Have rougher surfaces

    • D. 

      Have greater masses

  • 23. 
    What is the net force on an object when you combine a force of 10 N north with a force of 5 N south?
    • A. 

      5 N north

    • B. 

      50 N north

    • C. 

      15 N north

    • D. 

      5 N south

  • 24. 
    The difference between speed and velocity is that _________.
    • A. 

      Speed has direction, while velocity does not

    • B. 

      Velocity has direction, while speed does not

    • C. 

      Speed involves time, while velocity does not

    • D. 

      Velocity involves time, while speed does not

  • 25. 
    To produce change in motion, a force must be a(n) ________.
    • A. 

      Gravitational force

    • B. 

      Frictional force

    • C. 

      Unbalanced force

    • D. 

      Balanced force

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