Understanding Solar Phenomena and Observations

Bill Nye explains why the sun appears small due to its distance, despite its massive size. He describes how solar eclipses occur when the moon blocks the sun, casting a shadow on Earth. Bill demonstrates a safe method to observe the sun using a pinhole viewer, emphasizing the importance of not looking directly at the sun to avoid eye damage.

Why does the sun appear small when viewed from Earth?

• Because it is not very bright.

• Because it is actually small.

• Because it is very far away.

• Because it is hidden behind clouds.

How many Earths would it take to match the diameter of the sun?

• 109 Earths

• 100 Earths

• 75 Earths

• 50 Earths

What is the approximate temperature at the core of the sun?

• 1 million degrees Celsius

• 5 million degrees Celsius

• 10 million degrees Celsius

• 15 million degrees Celsius

What causes a solar eclipse?

• The Earth blocking the sun.

• The moon blocking the sun.

• The sun's light being too dim.

• The sun moving away from Earth.

What is the shape of the shadow cast by the moon during a solar eclipse?

• Round

• Square

• Triangular

• Irregular

What should you never do when observing the sun?

• Observe it at night

• Use a magnifying glass

• Look at it directly

• Use a telescope

What material is used to create the small hole in the pinhole viewer?

• Glass

• Paper

• Plastic

• Aluminum foil

What is the purpose of the white piece of paper in the pinhole viewer?

• To measure the sun's temperature

• To project the image of the sun

• To block sunlight

• To reflect sunlight