Let it Snow The First Direct Measure of Cloud Seeding SciShow News

The video discusses cloud seeding, a weather manipulation technique used to encourage precipitation. It explains the process of cloud seeding, its challenges, and recent research findings that measure its effectiveness. Additionally, the video covers the discovery of ancient green algae fossils in China, which pushes back the origin of these plants by 200 million years and provides insights into the evolution of photosynthesis and marine ecosystems.

What is the primary purpose of cloud seeding?

• To reduce global warming

• To encourage precipitation in dry areas

• To create snow for recreational activities

• To clear clouds for better visibility

What is the main challenge in determining the effectiveness of cloud seeding?

• Difficulty in measuring the difference between seeded and natural clouds

• Inconsistent weather patterns

• Lack of technology to seed clouds

• High cost of cloud seeding operations

How did researchers measure the impact of cloud seeding in the new study?

• By comparing rainfall in different regions

• By analyzing temperature changes

• By using snow gauges and radar devices

• By observing cloud color changes

What was the result of 20 minutes of cloud seeding in the study?

• It resulted in 67 minutes of snowfall

• It caused a temperature drop

• It had no measurable effect

• It cleared the skies

What significant discovery was made by researchers in China?

• A new method of cloud seeding

• Over 1000 tiny green algae fossils

• A new species of marine life

• A new type of photosynthesis

What do the algae fossils suggest about the origins of green plants?

• They are unrelated to modern plants

• They originated in marine environments

• They evolved much later than previously thought

• They originated in freshwater environments

What feature of the algae fossils helped researchers understand their structure?

• Their location in freshwater rocks

• Their complex branches and root-like structures

• Their large size

• Their color