Scaffolded notes
Build the idea
Graphs make vertical patterns visible
An atmospheric profile places altitude on the vertical axis and a measured variable on the horizontal axis. Look first for overall direction, turning points, steep changes, and intervals that stay nearly constant.
Compare more than one variable
Temperature may reverse direction between layers, while pressure continues to decrease. Comparing two graphs prevents an incorrect claim based on one variable. A complete analysis names the interval and uses values or trends as evidence.
Scientific explanations connect evidence to a cause
A claim answers the question. Evidence comes from the data. Reasoning explains why the evidence supports the claim using a science idea, such as ozone absorbing ultraviolet energy or gravity concentrating air near the surface.
Stop and explain
Check your thinking
1. Why should layer boundaries be placed near temperature turning points?
Possible response: Atmospheric layers are defined by changes in temperature trend.
2. What happens to pressure across all four layers?
Possible response: It decreases as altitude increases.
Interactive challenge
Try the science
A profile shows temperature decreasing, then increasing with altitude. What does the turning point most likely mark?
Before you leave
Exit ticket
Write one pattern that applies to atmospheric pressure but not always temperature.