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