Earthquakes, glaciers, water, and wind change our Earth. Scientists can measure and record these changes. So get ready to explore changes in our Earth. See how and why scientists measure the changes. Use your math skills to solve problems about the changes!
Earthquakes, glaciers, water, and wind change our Earth. Scientists can measure and record these changes. So get ready to explore changes in our Earth. See how and why scientists measure the changes. Use your math skills to solve problems about the changes!