Lesson 70 of 84 · Earth Systems
Lesson⭐ 30 XP🌋 Rock RealmSeasons and Earth's Tilt (Part 2)
Earth Systems.
🎯 Your mission
Master the concept. Use it tomorrow.
⚡ The twist
Today's mountain was yesterday's ocean floor.
Mind = Blown
🌋 There are 1,500 active volcanoes on Earth right now.
Make a hypothesis first
Guess: where will the water go first?
What You'll Learn
The water cycle describes how water moves through Earth's systems. Water evaporates from oceans, condenses into clouds, falls as precipitation, and flows back to the ocean.
Key Words
- barometer
- tectonic plates
- erosion
Steps
Study the diagram and label the parts you recognize.
Test rock hardness using Mohs scale: try scratching rocks with your fingernail, a penny, and a nail. Rank them from softest to hardest.
Note any unexpected results and think about why they happened.
Share your findings with the class or a partner and discuss what you learned.
Check Your Understanding
Question 1
1 of 3What are the three types of rocks?
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 Systems for 8th Grade
Get the full Earth Systems track as a printable PDF — all lessons, worksheets, and answer keys.