Learning Task No. 6: Choose the letter of the best answer. Write your answers on your answer sheet.

1. Mixture is ________________.

A. a chemically combined substance.

B. a combination of elements to make a new substance.

C. a combination of substances where new substances are formed through a reaction.

D. a combination of substances in which the atoms of the substance do not chemically combine2. Mixtures can be classified into

2 types, homogeneous and heterogeneous. They are different because

A.Heterogeneous has 2 substances while homogenous has 3 or more substances.

B. Homogeneous looks the same throughout, with heterogeneous you can see the different parts.

C. Heterogeneous looks the same throughout, with homogeneous you can see the different parts

D. They are the same, just different names

3. Which of these is a pure substance?

A.bread

B. table salt

C. garden soil

D. sea water

4. What is the simplest form that cannot be broken down to anything sim-pler?

A. element

B. solution

C. compound

D. colloids

5. Which of the following is a homogeneous mixture?

A. oil and water

C. halo-halo

B. sand and water

D. air

6. This type of mixture contains two or more substances that are visibly distinguishable.

A. homogeneous

C. solution

B. heterogeneous

D. suspension

7. A substance which consists of two or more elements which have been combined chemically is called _______________.

A. element

B. compound

C. mixture

D. atom

8.Select the term that describes the smallest particle of a compound that can exist and still retain the characteristic chemical properties of a sub-stance.

A. molecule

B. atom

C. electron

D. nucleus

9. Which of the following is a way in which elements and compounds are similar?

A.Elements and compounds are both pure substances.

B.Elements and compounds are both listed on the periodic table.

C.Elements and compounds are both made up of different kinds of at-oms.

D.Elements and compounds can both be broken down by physical changes.