Question

composition of matter
directions: choose the correct category from the list for each item. each category
will be used more than once.

1. chalk \ta. element
2. copper \tb. compound
3. granite \tc. suspension
4. vinegar \td. heterogeneous mixture
5. pond water \te. homogeneous mixture
6. water \tf. colloid
7. salt
8. permanent press fabric
9. soft drink
10. paint
11. gold
12. a river delta
13. fog
14. gelatin
15. lead

directions: complete the sentences by writing the letters of the correct terms on the lines provided.

1. all substances are built from ______.

\ta. elements \tc. metal
\tb. atom \td. salt

1. a beam of light can be seen as it passes through a(n) ______.

\ta. colloid \tc. element
\tb. solution \td. compound

1. a ______ is a homogenous mixture of particles so small they cannot be seen and

will not settle to the bottom of their container.
\ta. colloid \tc. element
\tb. solution \td. compound

Explanation:

Part 1: Classify each item (1 - 15)

1. Chalk: Chalk is mainly calcium carbonate, a compound. So 1 - b.
2. Copper: Copper is a pure element. So 2 - a.
3. Granite: Granite is a mixture with different components visible, heterogeneous mixture. So 3 - d.
4. Vinegar: Vinegar is a homogeneous mixture of acetic acid and water. So 4 - e.
5. Pond water: Pond water has suspended particles, a suspension (also heterogeneous, but suspension is a type). So 5 - c.
6. Water: Water (\(H_2O\)) is a compound. So 6 - b.
7. Salt: Table salt (\(NaCl\)) is a compound. So 7 - b.
8. Permanent press fabric: Often has a homogeneous mixture of polymers, etc. But if considering the options, maybe e (homogeneous mixture) or if it's a colloid? Wait, permanent press fabric might have a homogeneous mixture. But maybe better to check: Permanent press fabric is a homogeneous mixture (e). So 8 - e.
9. Soft drink: Soft drink is a homogeneous mixture (sugar, CO₂, water etc.). So 9 - e.
10. Paint: Paint is a suspension (particles can settle, heterogeneous). So 10 - c (or d, but suspension is more specific). So 10 - c.
11. Gold: Gold is an element. So 11 - a.
12. A river delta: Has sediments, heterogeneous mixture (d) or suspension (c). River delta has suspended sediments, so c (suspension) or d (heterogeneous). Let's say d (heterogeneous mixture) as it's a mixture with visible components. So 12 - d.
13. Fog: Fog is a colloid (liquid droplets in gas). So 13 - f.
14. Gelatin: Gelatin is a colloid (solid in liquid). So 14 - f.
15. Lead: Lead is an element. So 15 - a.

Part 2: Multiple Choice (16 - 18)

1. All substances are built from elements. Elements are the basic building blocks, compounds are made of elements, mixtures have elements/compounds. So 16 - a.
2. A beam of light can be seen as it passes through a colloid (Tyndall effect). So 17 - a.
3. A solution is a homogeneous mixture of particles so small they cannot be seen and will not settle. Colloids have larger particles (but still don't settle), but the definition here matches solution (particles are ions/molecules, very small). So 18 - b.

Answer:

s for Part 1 (1 - 15):

1. b
2. a
3. d
4. e
5. c
6. b
7. b
8. e
9. e
10. c
11. a
12. d
13. f
14. f
15. a