Earth Science Rocks!Warm up November 1

Question:How would this rock change after it has been in

a riverbed for a long time?The rushing water would begin to break the rock down and the rock’s edges would become rounded.

Earth Science Rocks!Standard: Investigate the scientific view of how the Earth’s surface is formed.

MYP Unit Question: How does land change?

Area of Interaction: Environment

Learner profile: Caring and Principled.

Learning Target: I need to know how human activity causes erosion so that I can help control it.

Activating Strategy/Opening

What’s the first thing you thoughtof when you saw this picture?Now, stop

and really think about it. Is it really funny or cute?

What’s going to happen when all the polar ice caps are gone?

Examine each image and explain what is happening?

Clearing the land

Off-Roading

Water Drainage

Human ImpactEroding the Land

Erosion by Human ActivityAgriculture

and construction

are the 2 ways in which

humans cause

erosion. (Yes, write it down in your

foldable on the last flap.)

Human activity causes 10 times more erosion than all the natural processes combined.

Did you know?• Natural erosion amounts to about 60 feet every

1 million years. • In agricultural regions of the United States, the

rate runs around 1,500 feet per million years, due largely to the human touch.

• Rates are even higher in other parts of the world, he said today.

No, you DON’T have to write this down.

Why does this matter?• Earth's surface involves a balanced process,

where new soil forms at about the same rate as it erodes.

• If humans are stripping soil at that rate, nature won't be able to keep up.

(This neither.)

Why is this critical?Two Reasons

1. The Earth's human population is growing rapidly.

2. Almost all the land that is capable of producing crops is being used.

Or this. In other words, DON’T write it down.

Help!!!

What do we do now?

Soil Conservation--TerracingBanaue rice terraces in the Philippines

Soil Conservation—Crop Rotation

Other solutions

What do you need to do?1. Complete the “Erosion by Human Activity”

Section of your foldable. (See page 296 & 297 for ways to prevent erosion and think about what causes erosion .)

2. Finish your foldable (due Friday – beginning of class)

a. Cover — definition of Erosionb. Booklet pages–notes–quality drawings–Labels

c. Back Cover – write your name3. Clean up all markers, pencils, and crayons before

you leave.