Match the following scenario to the type of change.
Column A
1.
burning fuel:
burning fuel
2.
cutting paper:
cutting paper
3.
rotting apple:
rotting apple
4.
boiling water:
boiling water
5.
slicing an orange:
slicing an orange
6.
rusting bike:
rusting bike
Column B
a.chemical change
b.physical change
1. burning fuel: a. chemical change
2. cutting paper: b. physical change
3. rotting apple: a. chemical change
4. boiling water: b. physical change
5. slicing an orange: b. physical change
6. rusting bike: a. chemical change
Matching the scenarios to the types of change:
1. burning fuel: a. chemical change
2. cutting paper: b. physical change
3. rotting apple: a. chemical change
4. boiling water: b. physical change
5. slicing an orange: b. physical change
6. rusting bike: a. chemical change
To match the scenarios to the type of change, we need to understand the difference between chemical and physical changes.
A physical change is a change in the form or state of matter. It does not result in the creation of new substances, but it may involve a change in shape, size, or phase (solid, liquid, gas).
A chemical change, on the other hand, is a change that results in the formation of new substances. It involves a rearrangement of atoms and the breaking or forming of chemical bonds.
Let's analyze each scenario:
1. Burning fuel: In this scenario, the fuel undergoes a chemical reaction with oxygen in the air, resulting in the release of energy. This is a chemical change (Answer: a).
2. Cutting paper: Cutting paper does not change the composition or properties of the paper. It only changes its shape and size. Therefore, this is a physical change (Answer: b).
3. Rotting apple: When an apple rots, the organic molecules in the apple chemically break down into simpler substances due to decomposition processes. This is a chemical change (Answer: a).
4. Boiling water: When water reaches its boiling point, it changes from a liquid phase to a gaseous phase (water vapor), but its chemical composition remains the same. Hence, this is a physical change (Answer: b).
5. Slicing an orange: Slicing an orange involves physically separating it into smaller pieces, but the chemical composition of the orange does not change. Therefore, this is a physical change (Answer: b).
6. Rusting bike: Rusting occurs when iron reacts with oxygen and moisture, resulting in the formation of iron oxide. This chemical reaction changes the composition of the bike's metal, so it is a chemical change (Answer: a).
Matching the scenarios to the type of change in column B:
1. burning fuel - a. chemical change
2. cutting paper - b. physical change
3. rotting apple - a. chemical change
4. boiling water - b. physical change
5. slicing an orange - b. physical change
6. rusting bike - a. chemical change