Chemistry Unit 2 Lesson 2 Physical Change vs. Chemical Change Answers
1. Which property of matter is an extensive, rather than an intensive, property of matter?
Answer - Mass
2. Why is it difficult to classify dissolving as simply a physical or a chemical change?
Answer - Some substances keep the same molecular structure when they break down, and others do not.
3. While camping, you make a snack over a campfire. You roast a marshmallow over the campfire...etc...etc Which statement correctly identifies a part of this process as a physical or a chemical change?
Answer - The toasting of the marshmallow is a chemical change.
4. Which term best describes a milkshake that contains pieces of chocolate cookies?
Answer - heterogeneous mixture
5. Which list only includes terms that describe water?
Answer - compound, molecule, pure substance
100% Hope this helps!
Also, just an FYI, never trust the letter answers for these type of QC's. They are different for everyone.
1. Which property of matter is an extensive, rather than an intensive, property of matter?
Answer - The ability of matter to accumulate more debt than it can pay off.
2. Why is it difficult to classify dissolving as simply a physical or a chemical change?
Answer - Because the particles in the drink are having the time of their lives, dancing and mingling, and we wouldn't want to label their party as just one thing.
3. While camping, you make a snack over a campfire. You roast a marshmallow over the campfire...etc...etc Which statement correctly identifies a part of this process as a physical or a chemical change?
Answer - The marshmallow turning into a charcoal briquette is definitely a chemical change. It went from fluffy and delicious to solid and burnt.
4. Which term best describes a milkshake that contains pieces of chocolate cookies?
Answer - Ah, the ultimate dream of milkshakes! This would be a heterogeneous mixture. Just like life, it's a blend of different components.
5. Which list only includes terms that describe water?
Answer - Well, water can be described as wet, splashy, and refreshingly quenching. Oh, you meant in terms of chemistry? It would be a compound, molecule, and pure substance. But let's not forget its outstanding qualities as a fantastic thirst quencher!
Hope my humorous answers brightened your day a bit! Remember, laughter is like a solution that can dissolve even the toughest of questions.
To get the answers to the questions regarding the properties of matter, physical and chemical changes, and terms related to water, you can refer to your Chemistry Unit 2 Lesson 2 materials. Here are the explanations for each question:
1. Which property of matter is an extensive, rather than an intensive, property of matter?
Answer: Mass
Explanation: An extensive property of matter is one that depends on the amount or size of the matter present. Mass is an example of an extensive property because it increases with the amount of matter you have.
2. Why is it difficult to classify dissolving as simply a physical or a chemical change?
Answer: Some substances keep the same molecular structure when they break down, and others do not.
Explanation: Dissolving can be considered a physical change because the substance being dissolved does not change its chemical composition. However, in some cases, dissolving can also involve a chemical change when the substance being dissolved undergoes a chemical reaction with the solvent.
3. Which statement correctly identifies a part of this process as a physical or a chemical change?
Answer: The toasting of the marshmallow is a chemical change.
Explanation: The toasting of the marshmallow involves the browning and caramelization of the sugars present in the marshmallow, which is a chemical change. Chemical changes involve the formation of new substances with different properties.
4. Which term best describes a milkshake that contains pieces of chocolate cookies?
Answer: Heterogeneous mixture
Explanation: A homogeneous mixture is a mixture that has a uniform composition and the components are evenly distributed. A heterogeneous mixture, on the other hand, has a non-uniform composition with visible differences between its components. Since a milkshake with pieces of chocolate cookies does not have a uniform distribution of the cookie particles, it would be classified as a heterogeneous mixture.
5. Which list only includes terms that describe water?
Answer: Compound, molecule, pure substance
Explanation: Water (H2O) is a compound because it is made up of two different elements (hydrogen and oxygen) chemically bonded together. It is also a molecule because it consists of two or more atoms chemically joined. Additionally, since water is composed of only one type of substance (H2O), it is considered a pure substance.
Remember to always consult your specific course materials or refer to trusted sources to get accurate information tailored to your course curriculum.