One region on the moon is covered with craters, while another is a smooth volcanic plain. which is older? how do we know?

6.4 One region on the Moon is covered with craters, while another is a smooth volcanic plane. Which is older? How much older? How do we know? The crater-covered surface is close to the same age as theMoon is - about 4 billion years. ... enshrouded in clouds, how do we know as much as we do about its surface?

The primarily goals of the zapatistas of mexico in 1994 were land reform and redistribution. it is also included in their demands to have a greater political and cultural autonomy for the indigenous people of chiapas and the rest of mexico.

This is all you, but i can give you some topics that you could try. if it rained when you want to do something outdoors, it 'limits' that human activity. maybe you want to do an experiment that goes throughout the whole year and you have to have above freezing the entire year. this 'limits' your activity. i thought of those just off of the top of my head. something that gets to me that might be getting to you is you are thinking too hard about what to do. think simply, and if it is too simple, then bump it up just a little bit.