weathering physically breaks rock down into smaller pieces called . A. Chemical; clay B. Mechanical; clay C. Chemical; sediment D. Mechanical; sediment

D. Mechanical; sediment

Explanation:

Weathering is the gradual disintegration of rocks on the earth's surface into smaller particles called sediments to form soil. this might occur as a result of rain water, high temperature, human activities , plants and animals.

answer: 21

step-by-step explanation:

divide 630 by 30. 30 goes into 630 21 times