1. WELCOME TO SCIENCE 11/16
Select a tray and a toothpick from the cart and carefully empty your soil sample onto the tray.
Today’s Schedule
1. Soil Samples
2. Ch. 10 Section 1 Notes/Discussion

2. What makes up your soil?

3. Have these places always looked like they do in these pictures?

4. What has caused these places to change the way they look?

5. What process changes the way Earth looks the most?
Weathering
The breaking down of rock into small pieces.

6. Mechanical Weathering
Physically breaking rock into smaller pieces.
How can this happen?
Wind, Water, Ice, Gravity, and Organisms

7. How do wind, water, and gravity cause weathering?
Abrasion
The action of rocks and sediment grinding against each other and wearing exposed surfaces.
Geology Rocks:

8. How do wind, water, and gravity cause weathering?
Ice
Ice Wedging- Water gets into cracks in rocks. When the water freezes, it expands, causing the crack to get bigger.
Weathering

9. Can plants & animals cause weathering?
YES!!!
Plants
Roots can grow into a crack causing the crack to get bigger and bigger.

10. Can plants & animals cause weathering?
As animals burrow into the ground, they loosen the soil which helps to break it down.
ARKive - Arabian sand boa
ARKive - Aardvark video

11. Welcome to Science 11/17
Have a seat with your lab group and get your notes out. Do not touch any of the computers or materials on the desks.
Today’s Schedule
1. Experiment of the Day
2. Question of the Day
3. Finish Notes/Discussion
4. Weathering Station Activity

12. Question of the Day
Scientists have linked the cause acid rain to high levels of air pollution. Observe the map below to predict which area will most likely have high amounts of acid rain.

13. Is mechanical weathering the only type of weathering?
Absolutely Not!!!
Chemical Weathering
The break down of rocks into new substances by a chemical reaction.

14. Water & Chemical Weathering
Just as water is the most important factor in mechanical weathering, it is also the most important factor in chemical weathering.
Water
It can dissolve rock
Acid rain can eat away rock
Earth: Acid Rain Eating Washington, D.C.