How can we measure our energy use?

if you look up in the top right corner you'll see your current profile picture, click than click "view profile" you'll be able to change it there.

geologic time scale (for gradpoint) =)

here is the answer

water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering. weathering is the breaking down or dissolving of rocks and minerals on earths surface. once a rock has been broken down, a process called erosion transports the bits of rock and minerals away.