directions: choose the correct category from the list for each item. each category will be used more than once
____ 1. chalk a. element
____ 2. copper b. compound
____ 3. granite c. suspension
____ 4. vinegar d. heterogeneous mixture
____ 5. pond water e. homogeneous mixture
____ 6. water f. 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.
____ 16. all substances are built from ____.
a. elements c. metal
b. atom d. salt
____ 17. a beam of light can be seen as it passes through a(n) ____.
a. colloid c. element
b. solution d. compound
____ 18. a ____ is a homogenous mixture of particles so small they cannot be seen and will not settle to the bottom of their container.
a. colloid c. element
b. solution d. compound

Question

directions: choose the correct category from the list for each item. each category will be used more than once
____ 1. chalk 				a. element
____ 2. copper 				b. compound
____ 3. granite 				c. suspension
____ 4. vinegar 				d. heterogeneous mixture
____ 5. pond water 				e. homogeneous mixture
____ 6. water 				f. 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.
____ 16. all substances are built from ____.
		a. elements 		c. metal
		b. atom 		d. salt
____ 17. a beam of light can be seen as it passes through a(n) ____.
		a. colloid 		c. element
		b. solution 		d. compound
____ 18. a ____ is a homogenous mixture of particles so small they cannot be seen and will not settle to the bottom of their container.
		a. colloid 		c. element
		b. solution 		d. compound

Accepted Answer

### Question 1
# Brief Explanations:
Chalk is a compound (calcium carbonate, $CaCO_3$), so it belongs to category b.
# Answer:
b. compound

### Question 2
# Brief Explanations:
Copper is an element (Cu), so it belongs to category a.
# Answer:
a. element

### Question 3
# Brief Explanations:
Granite is a heterogeneous mixture (different minerals mixed unevenly), so it belongs to category d.
# Answer:
d. heterogeneous mixture

### Question 4
# Brief Explanations:
Vinegar is a homogeneous mixture (acetic acid in water, uniform composition), so it belongs to category e.
# Answer:
e. homogeneous mixture

### Question 5
# Brief Explanations:
Pond water is a suspension (particles like dirt can settle), so it belongs to category c.
# Answer:
c. suspension

### Question 6
# Brief Explanations:
Water is a compound ($H_2O$), so it belongs to category b.
# Answer:
b. compound

### Question 7
# Brief Explanations:
Salt (sodium chloride, $NaCl$) is a compound, so it belongs to category b.
# Answer:
b. compound

### Question 8
# Brief Explanations:
Permanent press fabric often has a homogeneous mixture (polymer coatings, uniform), so it belongs to category e.
# Answer:
e. homogeneous mixture

### Question 9
# Brief Explanations:
Soft drink is a homogeneous mixture (sugar, flavor, CO₂ in water, uniform), so it belongs to category e.
# Answer:
e. homogeneous mixture

### Question 10
# Brief Explanations:
Paint is a colloid (pigment particles dispersed, don't settle quickly), so it belongs to category f.
# Answer:
f. colloid

### Question 11
# Brief Explanations:
Gold is an element (Au), so it belongs to category a.
# Answer:
a. element

### Question 12
# Brief Explanations:
A river delta has sediment (heterogeneous mixture, uneven distribution), so it belongs to category d.
# Answer:
d. heterogeneous mixture

### Question 13
# Brief Explanations:
Fog is a colloid (water droplets in air, Tyndall effect), so it belongs to category f.
# Answer:
f. colloid

### Question 14
# Brief Explanations:
Gelatin is a colloid (protein molecules dispersed), so it belongs to category f.
# Answer:
f. colloid

### Question 15
# Brief Explanations:
Lead is an element (Pb), so it belongs to category a.
# Answer:
a. element

### Question 16
# Brief Explanations:
All substances (elements, compounds) are built from elements. Atoms make elements, but the base building blocks of substances are elements. So option a.
# Answer:
a. elements

### Question 17
# Brief Explanations:
A beam of light is visible in a colloid (Tyndall effect), not in a solution, element, or compound. So option a.
# Answer:
a. colloid

### Question 18
# Brief Explanations:
A solution is a homogeneous mixture with particles too small to see and not settling. Colloid particles are larger but still don't settle, but the definition here matches solution (particles so small, no settling). Wait, actually, colloid particles are larger than solution, but the key: solution particles are ions/molecules (too small to see), colloid are larger (but still don't settle). Wait, the question says "particles so small they cannot be seen and will not settle". Solution particles are too small to see (ions, molecules), colloid particles are visible under microscope? Wait, no: solution - particles <1 nm, colloid 1 - 1000 nm. So "so small they cannot be seen" is solution. Wait, but the option: a. colloid, b. solution. Wait, the definition: a solution is a homogeneous mixture with particles that do not settle and are too small to see. Colloid particles are larger (can scatter light, Tyndall effect) but still don't settle. Wait, maybe the question's wording: "particles so small they cannot be seen" – solution. So option b.
# Answer:
b. solution

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