Get started!

The text below describes how an area's environment changed over time. Read the text. Then answer the question.

sediment deposited by a fast-flowing river

A fast-flowing river deposited heavy sediment grains along its banks. Light sediment such as mud was carried away by the strong water current.

sediment deposited in a desert

Over thousands of years, the river dried up, and the area became a desert. In the desert, sediment was deposited by wind.

How did the sediment deposited in this area change over time?

First, a layer of sand and pebbles was deposited. Later, a layer of sand was deposited.

First, a layer of sand was deposited. Later, a layer of sand and pebbles was deposited.

ref_doc_title.

$Confetti$

Now entering the Challenge Zone—are you ready?

Teacher tools

Work it out

Not feeling ready yet? This can help:

Stage 1