Which of the following do not form by deposition? beaches, deltas, moraines, mountains

An empty fuel tank can still contain and therefore can be even more dangerous than one full of liquid fuel.

The alkali metals (group 1) consist of lithium (3), sodium (11), potassium (19), rubidium (37), cesium (55), and francium (87). they are soft, metallic solids with low densities and low melting points. based on the data shown in figure 1, how many valence electrons do alkali metals share?

What are the 4 phases of matter in order of increasing engery content?