What temperature does solid rock need to reach to melt and form liquid lava?

Which type of bond forms between water moleculesstrong bondhydrogen bondcovalent bondpolar bond

What best explains the inability for life to exist in earth early atmosphere

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.