Clouds

Question 1

Cumulonimbus

Answer 1

cloud forming a towering mass with a flat base at fairly low altitude and often a flat top, as in thunderstorms.

Question 2

Cumulus

Answer 2

cloud forming rounded masses heaped on each other above a flat base at fairly low altitude.

Question 3

Stratus

Answer 3

cloud forming a continuous horizontal gray sheet, often with rain or snow.