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1. Which is conduction?(1 point)

energy transfer from a reaction system to its surroundings
energy transfer by currents of moving liquid or gas
energy transfer as electromagnetic waves
energy transfer by direct contact

2.What is a chemical reaction system?(1 point)
the reactants and products in a reaction
a container in which chemical reactions take place
everything outside the reaction
a diagram used to show energy changes in a reaction

3.The products of a particular reaction have more energy than the reactants. Which type of reaction has occurred?(1 point)
exothermic
endothermic
convection
radiation

4.Which type of reaction is occurring during a fireworks show? How do you know?(1 point)
It is an exothermic reaction. Heat must be added to light the fuses of the fireworks.
It is an endothermic reaction. Heat must be added to light the fuses of the fireworks.
It is an endothermic reaction. Fireworks are bright, indicating a release of light energy.
It is an exothermic reaction. Fireworks are bright, indicating a release of light energy.

5.Why does convection occur?(1 point)
Heat causes fluids to become less dense; so warmer fluids rise above cooler fluids, transferring energy.
Heat is released during some types of reactions and absorbed during others, transferring energy to the system or surroundings.
Heat increases the kinetic energy of molecules; the molecules have greater energy when they collide, increasing energy transfer.
Heat flows through the air as electromagnetic radiation, transferring energy without matter.

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3 answers
  1. I don't see any work on your part. Please do the following:
    1.Give your best answer and tell me why you think that is right OR
    2. If you have no clue tell me what you don't understand about the question.
    Note: I think you can find ALL of these on Google, especially the definitions such as exothermic vs endothermic and chemical system and conduction. I shall be happy to help you understand what you don't get. I just don't want to do all of your work for you. That's not the way you learn.

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  2. energy transfer 1 quick check:

    1) a. energy transfer by direct contact
    2) b. the reactants and products in a reaction
    3) b. endothermic
    4) a. it is an exothermic reaction. Fireworks are bright, indicating a
    release of light energy
    5) b. heat causes fluids to become less dense; so warmer fluids rise
    above cooler fluids, transferring energy.

    Also, DrBob222, I actually scoured the internet for the last three questions and couldn't find them anywhere. Sometimes students just need a little break and actually can in fact learn from receiving answers.

    Anyways, I just took the quick check and got number 4 wrong but it told me the right answer which is what I put here. Good luck :)

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  3. 100% after using @a random gorl 's answers, thanks bae <3

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