Question

directions: complete the concept map using the terms in the list below heterogeneous compound elements substances homogeneous mixtures matter is composed of various 1. which, when made up of like atoms, are of which two or more may combine in an easily separated manner to form 2. 4. of which two or more may form a which, if blended evenly throughout, are which, if the different materials are easily distinguished, are 3. 5. 6. directions: circle the term in parentheses that makes each statement correct. 7. a beam of light is (visible, invisible) as it passes through a solution, but (can, cannot) be seen as it passes through a colloid. 8. appearance and behavior are (chemical, physical) properties. 9. the change of one substance to another is a (chemical, physical) change. 10. when substances go through a chemical change, mass is always (gained, lost, conserved).

Explanation:

Concept Map Completion:

1. Step 1: Identify the first level under Matter

Matter is composed of various substances (since substances and mixtures are the two main categories of matter).

1. Step 2: Identify the category with like atoms

Substances made of like atoms are elements.

1. Step 3: Identify what elements form

Two or more elements form a compound.

1. Step 4: Identify the category of easily separated combinations

Combinations of substances that are easily separated are mixtures.

1. Step 5: Identify evenly blended mixtures

Evenly blended mixtures are homogeneous mixtures.

1. Step 6: Identify mixtures with distinguishable materials

Mixtures with easily distinguishable materials are heterogeneous mixtures.

Multiple Choice (Questions 7–10):

1. Step 1: Recall properties of solutions and colloids

Solutions are transparent, so light is invisible; colloids show the Tyndall effect, so light can be seen.

1. Step 1: Define physical vs. chemical properties

Appearance (color, state) and behavior (e.g., solubility) are physical properties (no chemical change needed to observe).

1. Step 1: Define chemical vs. physical change

A change producing a new substance is a chemical change.

1. Step 1: Recall the Law of Conservation of Mass

In a chemical change, mass is conserved (neither gained nor lost).

Answer:

s:

Concept Map:

1. substances
2. elements
3. compound
4. mixtures
5. homogeneous
6. heterogeneous

Questions 7–10:

1. invisible; can
2. physical
3. chemical
4. conserved