Look at the picture to the right. Some students are using acid to test rock samples they collected. Rock A formed bubbles and rock B didn’t. What can students say about the rocks after completing this test?

Where are large cobbles most likely to be found in a stream?

Where would clay most likely be found in a stream?

Which explanation best describes how a boulder can turn into silt as it moves down a river?

What is humus, and how does it form?

Explain which layers erode first in the Grand Canyon

A friend dug up two soil samples and forgot to record where they came from. What are several characteristics of soil that you could use to match them to the locations where they were collected?

. You „ nd some soil that is mostly made of clay and silt, but no sand. How might this soil have formed?

_______________ is a large, nearly level area of land that is higher than the surrounding area

Flat deposits of rock that cover a large area are called ________

When geologists work to find a relationship or connection between rock layers from two or more locations, we say that they are making a

Abrasion and ice wedging are forms of ______________ weathering

Clay, sand, silt, and pebbles are all kinds of _________________.