Lesson 75 of 84 · Cells
Lesson⭐ 30 XP🌿 Wild JungleMass Extinctions Through History (Part 4)
Mass Extinctions Through History (Part 4).
🎯 Your mission
Understand the idea. Then look for it everywhere.
⚡ The twist
Every species solves the same problem differently.
Mind = Blown
🐙 An octopus has 9 brains and 3 hearts.
Make a hypothesis first
Before you watch: what do you think it'll do?
What You'll Learn
Extinction occurs when the last member of a species dies. Mass extinctions have occurred several times in Earth's history, the most famous killing the dinosaurs 66 million years ago.
Key Words
- species
- heredity
Steps
Read the introduction and identify the main idea of this lesson.
Extract DNA from a strawberry using dish soap, salt, water, and rubbing alcohol. Observe the stringy white substance—that's DNA!
Look for patterns in your observations.
Make a graph or chart showing your results.
Check Your Understanding
Question 1
1 of 3What is an allele?
Where you see this in real life
This is why plants grow toward windows and why scabs form.
Stretch Challenge
Try this in real life this week.
Watch a plant or pet for 5 minutes today and write down what you noticed.
For the dinner table
“Tell me something you noticed about your own body today.”
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.
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