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.

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 :)

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

1. The option "energy transfer by direct contact" is conduction. Conduction is the process of transferring heat or electricity through direct contact between particles or objects.

2. A chemical reaction system refers to the reactants and products involved in a reaction. It includes all the substances, whether they are solids, liquids, or gases, that participate in a chemical reaction.

3. If the products of a reaction have more energy than the reactants, then an endothermic reaction has occurred. In an endothermic reaction, heat energy is absorbed from the surroundings, resulting in an increase in the energy of the products.

4. During a fireworks show, an exothermic reaction is occurring. This is because fireworks produce light, heat, and sound energy by undergoing chemical reactions that release energy. Therefore, the option "It is an exothermic reaction. Fireworks are bright, indicating a release of light energy" is the correct answer.

5. Convection occurs because heat causes fluids (liquids or gases) to become less dense. When a fluid is heated, its particles gain energy and move faster, making the fluid less dense. This leads to the warmer fluid rising above the cooler fluid, creating a convection current and transferring energy in the process. Therefore, the option "Heat causes fluids to become less dense; so warmer fluids rise above cooler fluids, transferring energy" is the correct answer.

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.