Define a chemical reaction in your own words, as discussed in the video.

A chemical reaction is when ingredients combine to make something new, often involving a heat swap.

What is the key difference between an exothermic and an endothermic reaction?

Exothermic reactions release heat, while endothermic reactions absorb heat.

Faster molecular movement indicates higher heat, while slower movement indicates cooler temperatures.

Diagram should show reactants converting to products with an arrow indicating heat being released into the surroundings.

I can describe how interactions between substances can cause chemical reactions that are either endothermic or exothermic.

1
Exothermic reactions release heat, causing the surroundings to become warmer, while endothermic reactions absorb heat, leading to a decrease in temperature.
2
In an investigation of chemical reactions, measure temperature changes to classify reactions; a temperature increase indicates an exothermic reaction, while a temperature decrease indicates an endothermic reaction.
3
When planning an investigation, ensure accurate temperature measurements by using a thermometer and controlling variables such as insulation to minimize heat exchange with the environment, thus isolating the heat swap of the reaction.