Explain how the valley cross profile changes downstream (4 marks) In the course, the valley is in a V-shape due to vertical erosion.

Whereas in the middle course… this is due to ….

The cross profile of the lower course is different because..

Describe the river long profile

Which of the following is a way that advancements in technology improve humans' ability to measure air quality and protect human health?

Match the graph type to its description. 1. uses symbols to describe information pie 2. compares different quantities at the same point in time line 3. compares increases and decreases in a quantity over a period of time bar 4. shows the relationship of parts to each other and to the whole pictograph

You could say the relative location of washington, d. c.