Lesson 5 of 5 · Human Impacts on Earth

Experiment⭐ 30 XP🌿 Wild Jungle

Choosing What to Measure

🧪Lab Brief #5

Human Impacts on Earth.

🎯 Your mission

Run the experiment. Find out what really happens.

⚡ The twist

What the body does in one minute is wilder than any cartoon.

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Mind = Blown

🦠 You have more bacterial cells in your body than human cells.

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Make a hypothesis first

Guess: how does the body solve this problem?

What You'll Learn

Deciding what to measure is half the investigation. "Is this plant healthy?" cannot be answered directly, but height, leaf count and leaf colour can all be measured — and together they stand in for health.

Key Words

Tap a word to see its definition.

Materials Needed

two potted plants
ruler
notebook

Safety First

Wash hands after handling soil.

Steps

Step 1 — Read

Read the explanation above and note the two key terms before you start.

Step 2 — Do

Choose three measurable indicators of plant health and record them for two plants over two weeks, one watered and one not. Say which indicator changed first.

Step 3 — Observe

Record what actually happened, including anything that did not match what you expected.

Step 4 — Record

Write a conclusion that answers the question this lesson opened with, and state your uncertainty.

Check Your Understanding

Question 1

1 of 2

An indicator is used when the thing you care about is:

How sure are you going to be?😐 maybe

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Where you see this in real life

Your own body is doing this thousands of times every second.

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Stretch Challenge

Try this in real life this week.

Find one thing about your body that's different from a friend's. Wonder why.

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For the dinner table

“Tell me something you noticed about your own body today.”

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Next Smart Experiment

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