fact and question: scraping an object may cause small particles to break off of that object
Question: Scraping the side of a cliff may result in

What's the answer?

answer: sand

fact and question: if all members of a species cannot produce offspring then that species will likely become extinct
Question: What happens when man moves into new environment but reproduction ceases to happen?

What's the answer?

answer: native species loses dwindle

fact and question: processes sometimes produce waste products
Question: What product eventually will become human waste?

What's the answer?

answer: corn

fact and question: as the size of an object appears larger , that object will be observed better
Question: A magnifying glass makes objects

What's the answer?

answer:
more clear