Page 118 - Science Class 6 Times Publication

6. A mixture of two or more substances in which one component
completely disappears in another is called homogeneous mixture.

7. A mixture of two or more substances in which the particles
of the components are not uniformly distributed and can be
seen with naked eyes is called heterogeneous mixture.
8. Suspension is a heterogeneous mixture in which the size of
-5
the particles is 10 cm or bigger.
9. A colloid is a uniform mixture in which the diameter of the
-5
-7
particles ranges between 10 cm to 10 cm.
10. The process by which the components of a mixture are
separated is called separation of mixture.

11. The mixtures are separated on the principle that different
materials have different properties.

12. Winnowing, sieving, sedimentation, decantation, ltration,
evaporation, distillation, magnetic separation, etc are some
common methods used in the separation of mixtures.

Exercise

1. Choose the best alternative in each case:

a. Which of the following is a mixture?

i. Water ii. Hydrogen iii. Air iv. Iron

b. Which of the following is a mixture?

i. Tea ii. Milk

iii. Sugar solution iv. All of the above

c. An example of heterogeneous mixture

i. Muddy water ii. Brine

iii. Syrup iv. All of the above

d. Which of the following is a colloid?

i. Blood ii. Milk iii. Gum iv. All of these

Times' Crucial Science and Environment 114 Book 6