Lesson 31 of 84 · Earth's History
Lesson⭐ 30 XP🌋 Rock RealmWhat Causes Ocean Tides
Earth's History.
🎯 Your mission
Master the concept. Use it tomorrow.
⚡ The twist
The slowest changes are the biggest ones.
Mind = Blown
🌊 The deepest part of the ocean is deeper than Mount Everest is tall.
Make a hypothesis first
Predict: which will erode faster?
What You'll Learn
Tides are the daily rise and fall of ocean water caused mainly by the Moon's gravity pulling on Earth. Most coasts experience two high tides and two low tides each day as Earth rotates.
Key Words
Tap a word to see its definition.
Steps
Read about Earth's History and write down three key facts.
Create a timeline of Earth's history on a 5-meter strip of paper. Place major events (first life, dinosaurs, ice ages, humans) at the correct scale.
Use your senses (except taste) to describe what you notice.
Write a summary of your findings in 3-5 sentences.
Check Your Understanding
Question 1
1 of 3What is the water cycle?
Where you see this in real life
This is shaping the ground you walk on, slowly, every single day.
Stretch Challenge
Try this in real life this week.
Find a rock outside and try to guess how old it is.
For the dinner table
“What's the slowest change you can think of?”
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 Earth's History for 4th Grade
Get the full Earth's History track as a printable PDF — all lessons, worksheets, and answer keys.