An astronaut has a mass of 60kg. Calculate their weight When they are on the surface of the moon.

__ _ _ _ _ is the process of removing earth materials from their original sites through weathering and transport and depositing the in another location. a. erosion b. sedimentation c. lithification d. dissolution

This is a characteristic of the elements in the periodic table that shows a pattern. it may increase or decrease across or down the table.

Compare and contrast physical changes with chemical changes.