Understanding Why Stars Twinkle

What phenomenon is compared to the twinkling of stars in the introduction?

• A windy day

• A snowy day

• A hot day with blurry scenes

• A rainy day

What percentage of the Earth's atmosphere is made up of oxygen?

• 10%

• 78%

• 21%

• 50%

Which gas makes up the largest portion of the Earth's atmosphere?

• Nitrogen

• Argon

• Carbon Dioxide

• Oxygen

What happens to hot air in the atmosphere?

• It rises

• It sinks

• It stays still

• It disappears

What is the term used to describe the bending of light?

• Absorption

• Reflection

• Diffraction

• Refraction

Why do stars appear to twinkle when viewed from Earth?

• Due to the Earth's rotation

• Because they are changing colors

• Due to the refraction of light in the atmosphere

• Because they are moving

Why do planets not twinkle as much as stars?

• They emit their own light

• They are larger than stars

• They are not affected by the atmosphere

• They are closer and their light comes in a thicker beam

What do indigenous Australians use the twinkling of stars for?

• Storytelling

• Telling time

• Predicting weather

• Navigation

Which of the following is NOT a reason for the twinkling of stars?

• Earth's rotation

• Temperature variations

• Atmospheric winds

• Density changes in the atmosphere

Which planets are mentioned as examples that do not twinkle much?

• Uranus and Pluto

• Mercury and Neptune

• Mars and Saturn

• Venus and Jupiter