chemistry quiz

what is winnowing?

• the process of beating up stalks is called winnowing.

• the process of removing chaff from grains with help of air

• the process of cleaning your teeth

• the process of digesting food

the process of beating stalks is called____________

draw a picture of winnowing

(u can draw stickman figure too, just draw something :) )

what is a pure substance?

• the substances which has a mixture in it

• a substance with only 3 components

• a substance with only one type of particle

• i don't know

in threshing, we beat up____

some examples of pure substance_____

• gold

• liquid mercury

what is handpicking

what is filteration?

what do you mean by mixture?

who are you?