Although Indiana has had many coal mines throughout its history, many of those are now closed. What would be the main reason behind the closure of those mines?

Fill in the combination notes for the main idea shown

Briefly describe in your own words the pros and cons of the changes people have made to the land in south florida.

As the earth formed, the force of gravity increased due to increased mass. what effect did this increased gravity have on the forming planet? the planet started to cool and an atmosphere formed. the planet started to become round and heat up. the planet started to wobble and turned upside down. the planet started to compress rock and form more radioactive elements.