Science Answer the following questions:[1 M]

The houses made from stone, bricks, and cement and concrete have a strong structure.

Metals, wood, stone, cement, concrete, timber, bricks, metal sheet, soil, Earth, marble, aluminium, iron, steel, bamboo, glass, plastic.
Concrete: is a wet mixture of sand, gravel, cement, and water used to create building foundations, footpaths or roads.

Soap, many liquid body wash are also used to clean our body.

Now a days we use variety of toothpastes and tooth powders to clean our teeth.

In olden times neem twigs, coal powder ash, tooth powder, salt, pomegranate rind, were used for cleaning teeth.

A naturally occurring mineral found in tooth paste and drinking water. Sodium Fluoride (NaF) is the source of fluoride in toothpaste.