Tornadoes are common in areas of flat plains because
1. flat plains receive the most heat
2. flat plains receive the most moisture
3. winds are able to flow without obstruction
4. thunderstorms are common in flat plain regions

The blue particles in this image are able to cross the cell membrane through simple diffusion. how will they be transported? outside the cell inside the cell o a. the substances will move directly across the membrane from outside the cell to inside the cell. b. the substances will move through channels in the membrane proteins from outside the cell to inside the cell. o c. the substances will move through channels in the membrane proteins from inside the cell to outside the cell. o d. the substances will move directly across the membrane from inside the cell to outside the cell.

A(n) is a molecule influences the way that a molecule reacts.

When ash and dust begin to settle on the ground, they eventually become compacted by