Question

practice together
directions: on the lines provided, write whether the following are examples of physical
or chemical properties.
physical properties are detected by the senses or measurements
chemical properties ability to react with a substance.

1. wooden blocks are solids.
2. bricks feel rough.
3. the body of a truck can rust.
4. a stop sign has eight sides.
5. some wild mushrooms are poisonous.
6. a marble floor is smooth.
7. raw, peeled potatoes can turn black.
8. steam is a gas.

Explanation:

1. Wooden blocks are solids: Solidity is a physical state (solid, liquid, gas) which is a physical property detected by observation (a measurement - state of matter).
2. Bricks feel rough: Roughness is a texture property detected by the sense of touch (one of the senses - tactile sense).
3. The body of a truck can rust: Rusting is a chemical reaction (oxidation of iron in the presence of water and oxygen). The ability to undergo this reaction is a chemical property.
4. A stop sign has eight sides: Shape (number of sides) is a physical characteristic detected by observation (visual sense).
5. Some wild mushrooms are poisonous: Poisonousness implies a chemical reaction when ingested (interaction with biological systems - a chemical reaction). So it is a chemical property.
6. A marble floor is smooth: Smoothness is a texture property detected by the sense of touch (tactile sense).
7. Raw, peeled potatoes can turn black: Turning black is due to a chemical reaction (enzymatic browning - oxidation reaction). The ability to undergo this reaction is a chemical property.
8. Steam is a gas: Gaseous state is a physical state (solid, liquid, gas) which is a physical property detected by observation (state of matter).

Answer:

1. Physical property
2. Physical property
3. Chemical property
4. Physical property
5. Chemical property
6. Physical property
7. Chemical property
8. Physical property