7

Lesson 7 of 84 ยท Matter and Atoms

Experimentโญ 30 XP๐Ÿงช Potion Kitchen

What Is a Chemical Reaction?

๐ŸงชLab Brief #7

Matter and Atoms.

๐ŸŽฏ Your mission

Run the experiment. Find out what really happens.

โšก The twist

If it bubbles, something invisible is escaping.

๐Ÿคฏ

Mind = Blown

๐Ÿ’ง Hot water can freeze faster than cold water under the right conditions. Nobody fully understands why.

๐Ÿ”ฎ

Make a hypothesis first

Guess: will the fizz be loud, soft, or none at all?

What You'll Learn

In a chemical reaction, substances called reactants are transformed into new substances called products. The total mass stays the same because atoms are rearranged, not created or destroyed.

Key Words

  • electron
  • ion

Materials Needed

  • ice cubes
  • salt
  • sugar
  • vinegar
  • baking soda

Safety First

  • Work in a well-ventilated area when using vinegar or other strong-smelling substances.
  • Dispose of materials properly after the experiment.

Steps

Step 1 โ€” Read

Look at the vocabulary words and write a definition for each in your own words.

Step 2 โ€” Do

Build a model of an atom using craft supplies. Show protons, neutrons, and electrons in the correct arrangement. Label each particle.

Step 3 โ€” Observe

Note any unexpected results and think about why they happened.

Step 4 โ€” Record

Share your findings with the class or a partner and discuss what you learned.

Check Your Understanding

Question 1

1 of 3

What is a mixture?

๐ŸŒ

Where you see this in real life

This is happening in your kitchen right now โ€” every time food cooks.

๐Ÿ†

Stretch Challenge

Try this in real life this week.

Find one ingredient in a snack and look up what it does.

๐Ÿ‘จโ€๐Ÿ‘ฉโ€๐Ÿ‘ง

For the dinner table

โ€œWhat's something we cook that mixes things together this way?โ€

๐ŸŽฏ

Next Smart Experiment

We'll pick an experiment that matches exactly how you're thinking right now.

๐Ÿ”ฌShare card

Share this experiment

Send it to a parent who's looking for a 10-minute kitchen science win.

๐Ÿ–จ๏ธ

Checkout complete lesson on Matter and Atoms for 7th Grade

Get the full Matter and Atoms track as a printable PDF โ€” all lessons, worksheets, and answer keys.

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What Is a Chemical Reaction? โ€” Matter and Atoms | 7th Grade Science | LittleActivity | LittleActivity