Select all the correct answers.
Why are fireworks is an example of a chemical change?
Group of answer choices
Heat is produced and a gas is formed.
Fireworks are changing shapes.
A color change occurs
A new substance is formed.
Heat is produced and a gas is formed.
A color change occurs.
A new substance is formed.
The correct answers are:
- Heat is produced and a gas is formed.
- A color change occurs.
- A new substance is formed.
To determine the correct answers, we can carefully analyze each option in relation to the concept of a chemical change.
1) Heat is produced and a gas is formed: This answer choice is correct because during a firework display, the chemical reactions taking place generate heat and produce gases that result in the characteristic explosive effect.
2) Fireworks are changing shapes: This answer choice is not correct. A change in shape does not necessarily indicate a chemical change. It could be a physical change, where the substance remains the same but undergoes a structural modification.
3) A color change occurs: This answer choice is correct. During a firework display, different chemical compounds are burning, resulting in vibrant colors. This change in color indicates a chemical reaction.
4) A new substance is formed: This answer choice is correct. In a chemical change, one or more substances undergo a transformation, leading to the creation of new substances with different chemical properties. In the case of fireworks, the combustion of various chemicals produces new substances in the form of gases and ash.
So, the correct answers are:
- Heat is produced and a gas is formed.
- A color change occurs.
- A new substance is formed.