Question

1)What is the brittle material inside a pencil that helps us write on a paper?

2)Rough surfaces have more microscopic Hills and valleys then smooth surface. An ice cube slides more easily on floor then eraser why do you think this is?

Answer it fast please

Answer 1

1) lead is present inside the pencil.
2)As eraser has more friction and roughness than the floor. 

Answer 2

Explanation:

1.lead which is made up of graphite.

2.As compared to ice eraser have more roughness and friction. Thats why ice slides more easily than eraser.