Science

7th

grade

Image

Unit 3: Chemistry (Practice Test)

user

32
plays

10 questions

Show Answers
See Preview
  • 1. Multiple Choice
    3 minutes
    1 pt

    When logs burn in a fireplace, a chemical reaction is occurring. What is true about this reaction?

    [Slide 17]

    The reaction is endothermic because it absorbs energy (heat & light) from it surroundings.

    The reaction is exothermic because it releases energy (heat & light) into its surroundings.

    The reaction involves an ionic compound made up of a metal and nonmetal.

    The reaction does not change break apart or change chemical bonds.

  • 2. Multiple Choice
    3 minutes
    1 pt
    Image

    Which chemical formula below shows a covalent compound? (Hint: Nonmetal + Nonmetal)

    [Slide 9]

    MgO

    NaCl

    HBr

    CO2

  • 3. Multiple Choice
    3 minutes
    1 pt
    Image

    Which chemical formula below shows an ionic compound? (Hint: Metal + Nonmetal)

    [Slide 9]

    N2O

    NaCl

    C6H12O6

    CO2

  • Answer choices
    Tags
    Answer choices
    Tags

    Explore all questions with a free account

    Already have an account?