Lesson 80 of 84 · Spacetime
Simulation⭐ 30 XP🚀 StarbaseHow the Immune System Works (Part 2)
Spacetime.
🎯 Your mission
Play with the model. Break it. Understand it.
⚡ The twist
Gravity is invisible — but it shapes everything.
Mind = Blown
🌟 The light from the closest star (after the sun) takes 4 years to reach you.
Make a hypothesis first
Before you check: which is closer?
What You'll Learn
The immune system defends the body by finding and destroying harmful invaders such as bacteria and viruses. White blood cells hunt down germs, and after fighting an illness the body can remember it and respond faster the next time.
Key Words
Tap a word to see its definition.
Steps
Review the background information on Spacetime before starting.
Collect and classify 10 organisms from your yard into kingdoms, phyla, or groups. Use a dichotomous key if available.
Look for patterns in your observations.
Make a graph or chart showing your results.
Check Your Understanding
Question 1
1 of 3What is germination?
Where you see this in real life
Every sunrise and every shadow is this idea in action.
Stretch Challenge
Try this in real life this week.
Look at the moon tonight. Notice its shape. Look again in 3 days.
For the dinner table
“If you could visit any planet, which would you pick and why?”
Next Smart Experiment
We'll pick an experiment that matches exactly how you're thinking right now.
Share this experiment
Send it to a parent who's looking for a 10-minute kitchen science win.
Checkout complete lesson on Spacetime for 9th Grade
Get the full Spacetime track as a printable PDF — all lessons, worksheets, and answer keys.