UnScramble this Word: m t a i n e o t t s p?

Questions

What is the closest planet to the sun?

What is the collective term for a body of goods and monies from which future income can be derived?

What is the combination of fine clay and sand for making pottery?

What is the common name for corporations formed to act as trustees according to the terms of contracts known as trust agreements?

What is the common name for many species of burrowing mollusks?