Use math skills to figure out how far Landsat-7 is from the Earth.
Engagement Hold a globe for the students to see.
Exploration Shine a flashlight on the globe and pretend it is Landsat-7. Its orbital path is within 8 degrees of the North and South Poles. Spin the globe and move the flashlight from pole to pole and tell the students the satellite will return to take the same images at the same time every 16 days. Also, consistency in data is very important. Landsat-7 takes images of the same location at the same local time.