Question
What do these two changes have in common? photosynthesis milk going sour Select all that apply. Both are only physical changes. Both are chemical changes. Both are caused by cooling. Both by heating.
Ask by Mccarthy Weaver. in the United States
Jan 30,2025
Real Tutor Solution
Tutor-Verified Answer
Answer
Both processes are chemical changes.
Solution
Both **photosynthesis** and **milk going sour** involve chemical changes. Here's a breakdown of each option:
1. **Both are only physical changes.**
- **Incorrect.**
- **Photosynthesis** is a chemical process where plants convert carbon dioxide and water into glucose and oxygen using sunlight.
- **Milk going sour** is a chemical change caused by bacteria converting lactose into lactic acid.
2. **Both are chemical changes.**
- **Correct.**
- Both processes involve the transformation of substances into different chemical compounds.
3. **Both are caused by cooling.**
- **Incorrect.**
- **Photosynthesis** is driven by sunlight (a form of energy), not cooling.
- **Milk souring** can be influenced by temperature, but it's typically accelerated by warmth rather than cooling.
4. **Both by heating.**
- **Incorrect.**
- While **photosynthesis** relies on sunlight (which includes heat energy), it's primarily the light energy that drives the chemical reactions, not just heating.
- **Milk souring** is accelerated by warmer temperatures, but heating alone doesn't cause the chemical changes; it's the bacterial activity facilitated by suitable temperatures.
**Summary:**
- **Both are chemical changes.**
Reviewed and approved by the UpStudy tutoring team
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Simplify this solution Beyond the Answer
Both photosynthesis and milk going sour involve chemical changes that transform substances into new products. Photosynthesis converts carbon dioxide and water into glucose and oxygen, undergoing significant chemical alteration driven by sunlight. On the flip side, when milk sours, lactic acid bacteria ferment lactose, changing it chemically from sweet milk to tangy sour. Neither process occurs due to simple heating or cooling; rather, they depend on environmental conditions or biological activities. In photosynthesis, sunlight is the catalyst, while in souring milk, it's the action of bacteria that initiates the chemical transformation. Fun, right?
