Educational worksheet for identifying physical and chemical properties and changes in matter.

Problem Overview:

The task involves identifying physical and chemical properties, as well as physical and chemical changes, based on the definitions provided. Additionally, you are asked to classify given scenarios into either physical changes (P) or chemical changes (C).

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Step-by-Step Solution:

#### Part 1: Identifying Physical and Chemical Properties

Definitions Recap:
- Physical Property: Observed with senses; determined without destroying matter.
- Chemical Property: Requires a chemical change to use; matter will be changed into a new substance after the reaction.

List of Items to Identify:
1. blue color
2. density
3. flammability (burns)
4. solubility (dissolves)
5. reacts with acid
6. supports combustion
7. sour taste
8. melting point
9. reacts with water
10. hardness
11. boiling point
12. fluster
13. odor
14. reacts with air

Classification:
- Physical Properties (P):
- 1. blue color (observed with senses)
- 2. density (measured without changing the substance)
- 4. solubility (dissolves) (can be observed without changing the substance)
- 7. sour taste (observed with senses)
- 8. melting point (a characteristic property measured without destruction)
- 10. hardness (measured without changing the substance)
- 11. boiling point (a characteristic property measured without destruction)
- 13. odor (observed with senses)

- Chemical Properties (C):
- 3. flammability (burns) (requires burning, which is a chemical change)
- 5. reacts with acid (involves a chemical reaction)
- 6. supports combustion (involves a chemical reaction)
- 9. reacts with water (involves a chemical reaction)
- 12. fluster (likely a typo; if it means "rusts," it would involve a chemical reaction)
- 14. reacts with air (involves a chemical reaction)

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#### Part 2: Identifying Physical and Chemical Changes

Definitions Recap:
- Physical Change: A change in size, shape, or state; no new substance is formed.
- Chemical Change: A change in the physical and chemical properties; a new substance is formed.

List of Items to Identify:
1. NaCl (Table Salt) dissolves in water.
2. Ag (Silver) tarnishes.
3. An ice cube melts.
4. Heat changes H₂O to steam.
5. Baking soda reacts with vinegar.
6. Fe (Iron) rusts.
7. Alcohol evaporates.
8. Ice melts.
9. Milk sours.
10. Sugar dissolves in water.
11. Pancakes cook.
12. Pancakes burn.
13. Gasoline burns.
14. A tire is inflated.
15. Food is digested.
16. Paper towel absorbs water.

Classification:
- Physical Changes (P):
- 1. NaCl (Table Salt) dissolves in water. (No new substance is formed; just a change in state.)
- 3. An ice cube melts. (Change in state from solid to liquid; no new substance.)
- 4. Heat changes H₂O to steam. (Change in state from liquid to gas; no new substance.)
- 7. Alcohol evaporates. (Change in state from liquid to gas; no new substance.)
- 8. Ice melts. (Change in state from solid to liquid; no new substance.)
- 10. Sugar dissolves in water. (No new substance is formed; just a change in state.)
- 14. A tire is inflated. (No new substance is formed; just a change in pressure.)
- 16. Paper towel absorbs water. (No new substance is formed; just a change in state.)

- Chemical Changes (C):
- 2. Ag (Silver) tarnishes. (Silver reacts with oxygen to form a new substance, silver oxide.)
- 5. Baking soda reacts with vinegar. (Baking soda reacts with vinegar to form carbon dioxide gas, water, and sodium acetate.)
- 6. Fe (Iron) rusts. (Iron reacts with oxygen and water to form iron oxide, a new substance.)
- 9. Milk sours. (Microorganisms break down lactose in milk, forming lactic acid, a new substance.)
- 11. Pancakes cook. (Heat causes chemical reactions that change the structure of the ingredients, forming a new substance.)
- 12. Pancakes burn. (Excessive heat causes the breakdown of organic compounds, forming new substances.)
- 13. Gasoline burns. (Gasoline reacts with oxygen to form carbon dioxide and water, new substances.)
- 15. Food is digested. (Enzymes break down food molecules into simpler substances, forming new substances.)

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#### Part 3: Classifying Physical and Chemical Changes in Scenarios

Instructions Recap:
- If the substance has been changed into another substance, it is a chemical change (C).
- If the substance has not been changed into another substance, it is a physical change (P).

List of Scenarios:
1. An ice cube is placed in the sun. Later there is a puddle of water. Later still the puddle is gone.
2. Two chemicals are mixed together and a gas is produced.
3. A bicycle changes color as it rusts.
4. A solid is crushed into a powder.
5. Two substances are mixed and light is produced.
6. A piece of ice melts and reacts with sodium.
7. Mixing salt and pepper.
8. Chocolate syrup is dissolved in milk.
9. A marshmallow is toasted over a campfire.
10. A marshmallow is cut in half.

Classification:
- Physical Changes (P):
- 1. An ice cube is placed in the sun. Later there is a puddle of water. Later still the puddle is gone. (Melting and evaporation are physical changes; no new substance is formed.)
- 4. A solid is crushed into a powder. (Crushing changes the shape but not the chemical composition.)
- 7. Mixing salt and pepper. (No chemical reaction occurs; just a mixture.)
- 8. Chocolate syrup is dissolved in milk. (Dissolving is a physical change; no new substance is formed.)
- 10. A marshmallow is cut in half. (Cutting changes the shape but not the chemical composition.)

- Chemical Changes (C):
- 2. Two chemicals are mixed together and a gas is produced. (Formation of a gas indicates a chemical reaction.)
- 3. A bicycle changes color as it rusts. (Rusting involves a chemical reaction between iron and oxygen, forming iron oxide.)
- 5. Two substances are mixed and light is produced. (Light production often indicates a chemical reaction.)
- 6. A piece of ice melts and reacts with sodium. (Reaction with sodium forms a new substance, such as sodium hydroxide.)
- 9. A marshmallow is toasted over a campfire. (Toasting involves chemical reactions that change the structure of the marshmallow.)

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Final Answer:

#### Part 1: Physical and Chemical Properties
- Physical Properties (P): 1, 2, 4, 7, 8, 10, 11, 13
- Chemical Properties (C): 3, 5, 6, 9, 12, 14

#### Part 2: Physical and Chemical Changes
- Physical Changes (P): 1, 3, 4, 7, 8, 10, 14, 16
- Chemical Changes (C): 2, 5, 6, 9, 11, 12, 13, 15

#### Part 3: Classifying Scenarios
- Physical Changes (P): 1, 4, 7, 8, 10
- Chemical Changes (C): 2, 3, 5, 6, 9

Boxed Final Answer:
\[
\boxed{
\text{Part 1: P: 1, 2, 4, 7, 8, 10, 11, 13; C: 3, 5, 6, 9, 12, 14}
}
\]
\[
\boxed{
\text{Part 2: P: 1, 3, 4, 7, 8, 10, 14, 16; C: 2, 5, 6, 9, 11, 12, 13, 15}
}
\]
\[
\boxed{
\text{Part 3: P: 1, 4, 7, 8, 10; C: 2, 3, 5, 6, 9}
}
\]