Unit 7: Chemical Reactions

Unit 7: Chemical Reactions 

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  1. 00:01:20 

    Check all that apply: What are examples of chemical change?

     

    • Cooking an egg 
    • Food changing into energy 
    • Burning paper 
    • Breaking a glass 

  2. 00:01:54 

    Matter is constantly changing but is never created or destroyed.

     

    • True 
    • False 

  3. 00:02:52 

    Physical Changes occur when all of the following are seen, check all that apply:

     

    • Change in size 
    • Change in shape 
    • Change in phase 
    • Change in chemical composition 

  4. 00:05:30 

    If I change  water from its liquid form into its solid form I make a new chemical compound.

     

    • true 
    • false 

  5. 00:05:56 

    When matter interacts with other matter and changes its form chemical it has undergone what type of change?

     

    • Chemical  
    • Physical 

  6. 00:06:49 

    Check all that apply, what are different ways that you can tell a chemical change has taken place:

     

    • color change 
    • heat 
    • chemical change 
    • same material just smaller 

  7. 00:08:14 

    Seeing light is also a sign that a chemical change has taken place?

     

    • true 
    • false 

  8. 00:08:16 

    The formation of bubbles is also evidence that a chemical change has taken place.

     

    • true 
    • false 

  9. 00:08:39 

    Is the sawing of the wood a chemical or physical change?

     

    • chemical 
    • physical 

  10. 00:08:53 

    is the light bulb emitting light a chemical or physical change?

     

    • physical change 
    • chemical change 

  11. 00:10:21 

    Rusting is the addition of what element 

     

    • hydrogen 
    • oxygen 
    • iron 

  12. 00:14:03 

    1. Ice being broken into small bits is an example of a _____________ change.

     

    • Chemical 
    • Physical 

  13. 00:14:22 

    2. In a physical change the matter does not change ____________.

     

    • chemical 
    • its shape 

  14. 00:14:36 

    3. In a chemical change a ________ substance is formed.

     

    • new 
    • old 

  15. 00:14:54 

    4. A chemical _______________ is a way to describe how matter reacts with other matter.

     

    • reaction 
    • change 

  16. 00:15:14 

    5. Flammability is the chemical property describing how a substance ____________.

     

    • reacts 
    • changes with the addition of oxygen 

  17. 00:15:31 

    6. A clue that a chemical change is occurring in a burning flame is that ____________ is given off.

     

    • heat 
    • light 
    • heat and light 

  18. 00:15:42 

    7. Chemical changes occur at _________ speeds.

     

    • the same 
    • different  

  19. 00:16:01 

    8. _______ is the substance produced by iron reacting with oxygen in the air.

     

    • browing 
    • rusting 

  20. 00:16:19 

    9. A chemical __________ is the chemical change in which one or more substances change.

     

    • change 
    • reaction 

  21. 00:16:35 

    10. _____________ is a chemical reaction in green plants that produces energy and oxygen.

     

    • decomposition 
    • photosynthesis 

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