3. It is a mixture of two materials in which different materials are not mixed uniformly, or the materials are can be easily seen.
a. solid-liquid mixture
b. heterogeneous mixture
c. homogenous mixture

4. It is a mixture of two materials in which different materials are mixed uniformly, or the materials are cannot be easily seen
a. liquid-solid mixture
b. heterogeneous mixture
c. homogenous mixture mixture.

5. Oil and water mixture is an example of
a. a solid and liquid mixture
b. liquid and liquid mixture
c. heterogeneous mixture. mixture

6. Sand and rock mixture is an example of
a. a solid and solid mixture
b. heterogeneous mixture
c. homogenous mixture​