Objectives:

• Students will describe and give examples of ways in which Earth's surface is torn down by mechanical and chemical weathering.

• Students will describe and give examples of ways in which Earth's surface is built up by the formation of soil.

• Students will describe and give examples of ways in which Earth's surface is down by processes of erosion.

Weathering and Soil pg. 212

1. How does erosion change Earth's surface?

2. How does weathering change Earth's surface?

Guiding Questions:

Weathering and Soil pg. 212

​Even the hardest rocks wear down over time on Earth's surface. Natural process such as the on that produced the wave in Figure 1, break down rocks and carry the pieces away. Geologist make inferences about what processes shaped Earth's surface in the based based on the principals of uniformitarianism. This principal states that the geological processes that operate today also operated in the past. Scientist infer that ancient landforms and featured formed through the same processes they observe today and will continue to do so in the future.

Breaking Down Earth's Surface

Breaking Down Earth's Surface

The processess of weathering and erosion work together to change Earth's surface by wearing down and carrying away rock particles. The process of wearing down and carrying away rcok particles. The process of weathering breaks down rock and other substances. Heat, cold, water, ice and gases all contribute to weathering. Erosion involves the removal of rock particles by wind, water, ice , or gravity.

Pg. 213