NASA
Lava Layering
Take the old baking soda and vinegar volcano to the next level by using it to study repeated lava flows over time, examine geologic features on Earth and Mars, and speculate about some of the formations on Mars.
K5 Learning
Landforms
Valleys, mountains, and plateaus are just a few geographic landforms on our Earth. Read about these types and more in a brief landform passage. After reading, learners respond to six short answer comprehension questions.