Watermelon Snow and Its Effects

Watermelon snow, a pink snow with a watermelon scent, is caused by the algae Chlamydomonas nivalis. Historically noted by Aristotle and explored by Captain John Ross, its pink hue is due to a red pigment that protects the algae from solar radiation. This algae thrives in high altitudes and cold environments, using carotenoids to manage photosynthesis. As snow melts, the algae become active, supporting other life forms. Sun cups, formed by the algae's heat absorption, are common in regions like the Sierra Nevada. While generally safe, consuming large amounts of watermelon snow may cause digestive issues.

What was the initial belief about the cause of the pink color in watermelon snow?

• Mineral impurities

• Presence of red dye

• Iron deposits in the soil

• Blood contamination

Which type of algae is responsible for the pink color in watermelon snow?

• Ulva

• Volvox

• Chlamydomonas nivalis

• Spirogyra

What pigment helps C. nivalis protect itself from solar radiation?

• Chlorophyll

• Astaxanthin

• Xanthophyll

• Beta-carotene

What is the main reason for the red outer layer of C. nivalis?

• To attract pollinators

• To store nutrients

• To protect from solar radiation

• To enhance photosynthesis

During which season do the algae in watermelon snow become active?

• Summer

• Autumn

• Spring

• Winter

What helps C. nivalis survive at high altitudes?

• Warm temperatures

• High nutrient levels

• Thick cell walls

• Low solar radiation

What are sun cups?

• Indentations in the snow caused by algae

• Snow mounds created by animals

• Ice crystals formed at night

• Snow formations caused by wind

Where in the United States can you find watermelon snow?

• Rocky Mountains

• Cascade Range

• Sierra Nevada

• Appalachian Mountains

What is a potential side effect of consuming watermelon snow?

• Diarrhea

• Dizziness

• Nausea

• Headache

How many people participated in the study on the effects of eating watermelon snow?

• Twelve

• Ten

• Seven

• Five