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 Schedule1. Soil Samples2. Ch. 10 Section 1 Notes/Discussion

What makes up your soil?

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

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

What process changes the way Earth looks the most?

WeatheringThe breaking down of rock into small pieces.

Mechanical Weathering

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

How do wind, water, and gravity cause weathering?

AbrasionThe action of rocks and sediment grinding

against each other and wearing exposed surfaces.

Geology Rocks:

How do wind, water, and gravity cause weathering?

IceIce Wedging- Water gets into cracks in

rocks. When the water freezes, it expands, causing the crack to get bigger.

Weathering

Can plants & animals cause weathering?

YES!!!PlantsRoots can grow into a crack causing the

crack to get bigger and bigger.

Can plants & animals cause weathering?

AnimalsAs animals burrow into the ground, they

loosen the soil which helps to break it down. ARKive - Arabian sand boa ARKive - Aardvark video

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 Schedule1. Experiment of the Day2. Question of the Day3. Finish Notes/Discussion4. Weathering Station Activity

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.

Is mechanical weathering the only type of weathering?

Absolutely Not!!!Chemical WeatheringThe break down of rocks into new substances

by a chemical reaction.

Water & Chemical Weathering

Just as water is the most important factor in mechanical weathering, it is also the most important factor in chemical weathering.

WaterIt can dissolve rockAcid rain can eat away rock Earth: Acid Rain Eating Washington, D.C.