(answer in grade 9 level): Choose any two variables (temperature, concentration, surface area, addition of a catalyst). Tell how the variables you have chosen might be seen acting in real life. For example, how could adding extra chocolate milk mix to your glass of milk result in a different product? How might over heating an oven result in burnt cookies? In your examples, see if you can related the situation to how particles are behaving. Are they colliding more often or less often? Are they larger or smaller? You can use a picture in your answer if you'd like to! You can write a paragraph or make a list!

Question

6 points

(6 points)

Answer 1

Variables: Temperature and Concentration

Example 1: Temperature - Baking Cookies

When baking cookies, if you overheat the oven, the temperature becomes too high. This causes the cookie dough particles to vibrate faster. As the particles move more rapidly, they collide more often with each other and with the heat around them. This can lead to the cookies cooking too quickly on the outside while not being fully cooked on the inside. Eventually, the sugar and fats can burn, causing the cookies to be crispy on the outside and burnt rather than a nice, golden-brown texture. The high temperature makes chemical reactions happen quicker, but if they happen too fast or too hot, the product can be ruined!

Example 2: Concentration - Making Kool-Aid

When you make Kool-Aid, the amount of drink mix you add to water represents concentration. If you add too much mix, the solution becomes more concentrated, which changes how the particles interact. In a more concentrated solution, there are more particles of Kool-Aid mix in the same amount of water. This means that the particles are crowded together and collide more frequently with the water molecules. As a result, the drink tastes much stronger and sweeter. If you add just the right amount, the particles are balanced, and the result is a refreshing drink. But if you add too little, the particles are too spread out, and the Kool-Aid ends up being watery and bland.

Summary

• Temperature affects how particles behave during baking. High temperatures lead to faster moving and colliding particles, resulting in burnt cookies if not monitored carefully.

• Concentration in a drink mix changes the flavor. More concentrated mixtures have more particles that collide in a smaller space, creating stronger flavors, while less concentration can dilute the taste.

Understanding how temperature and concentration impact particle behavior helps explain everyday situations in cooking and mixing drinks!