Today, the air we breathe has lots of oxygen – over 20 percent! But that wasn’t always the case.
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Ask An Earth and Space Scientist
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Rough and Smooth Lava
The surface of lava can appear smooth, rough, jagged, and sometimes like a pile of construction rubble. What are the stories behind these surface features and how did they form?
Ask An Earth and Space Scientist
Ask An Earth and Space Scientist is an educational resource for students, teachers, parents, and life-long learners. We encourage anyone interested in earth and space to make use of its content.
Meteorites are rocks from space, often from asteroids, Mars, or even the Moon. Join us on a journey through space and time, as we explore meteorites.
The surface of lava can appear smooth, rough, jagged, and sometimes like a pile of construction rubble. What are the stories behind these surface features and how did they form?
If humans discovered aliens, what would they look like? And where would we find them?
