Question

chapter 15 classification of matter quiz
classify the following as an element, compound, homogeneous, or heterogeneous mixture.

1. salt water:
2. nacl:
3. gold:
4. salad:

classify the following as a chemical change or physical change:

1. crushing ice:
2. food spoiling:
3. burning paper:

classify the following as chemical or physical property

1. flammability
2. melting point
3. corrosive

fill in: use word bank at bottom to answer 11 - 17 questions

1. the scattering of light by particles in a mixture
2. a homogeneous mixture that remains uniform
3. matter in which all atoms are alike
4. mixture of air and water droplets
5. heterogeneous mixture that does not separate
6. made from atoms of 2 or more elements
7. a type of mixture in which all substances are uniformly spread out.
8. substances can be split into two parts, what are they?

word bank
element homogeneous mixture colloid
tyndall effect solution fog
compound heterogeneous mixture coagulation
suspension law of conservation.

Explanation:

1. Salt water is a homogeneous mixture as salt dissolves uniformly in water.
2. NaCl is a compound as it is made of sodium and chlorine chemically bonded.
3. Gold is an element as it consists of only gold atoms.
4. Salad is a heterogeneous mixture as its components are not uniformly distributed.
5. Crushing ice is a physical change as it only changes the form of ice, not its chemical composition.
6. Food spoiling is a chemical change as it involves chemical reactions that alter the food's composition.
7. Burning paper is a chemical change as it results in the formation of new substances (ash, smoke, etc.).
8. Flammability is a chemical property as it describes a substance's ability to undergo a chemical reaction (burning).
9. Melting point is a physical property as it describes a physical change (melting) of a substance.
10. Corrosive is a chemical property as it involves a chemical reaction (corrosion) of a substance.
11. The scattering of light by particles in a mixture is the Tyndall Effect.
12. A homogeneous mixture that remains uniform is a solution.
13. Matter in which all atoms are alike is an element.
14. A mixture of air and water droplets is fog.
15. A heterogeneous mixture that does not separate is a suspension.
16. Made from atoms of 2 or more elements is a compound.
17. A type of mixture in which all substances are uniformly spread out is a homogeneous mixture.
18. Substances can be split into pure substances and mixtures.

Answer:

1. Homogeneous mixture
2. Compound
3. Element
4. Heterogeneous mixture
5. Physical change
6. Chemical change
7. Chemical change
8. Chemical property
9. Physical property
10. Chemical property
11. Tyndall Effect
12. Solution
13. Element
14. Fog
15. Suspension
16. Compound
17. Homogeneous mixture
18. Pure substances, Mixtures