NDGT

What is the primary component of Earth's atmosphere?

• Nitrogen

• Oxygen

• Carbon Dioxide

• Hydrogen

What color is the Sun when observed in the middle of the day?

• Orange

• White

• Yellow

• Red

What phenomenon causes the sky to appear blue?

• Rayleigh scattering

• Reflection

• Dispersion

• Refraction

What are the three primary colors of light according to the text?

• Yellow, Green, Violet

• Green, Blue, Indigo

• Red, Yellow, Blue

• Red, Green, Blue

Why do sunsets appear red?

• Because the Sun is cooler

• Because of pollution

• Because the Sun turns red

• Because of Rayleigh scattering

Why can't we see stars in the daytime?

• Because the Sun is too bright

• Because they are hidden by clouds

• Because they are too far away

• Because of the scattered blue light

What is the operational definition of space according to the text?

• Where there is no gravity

• Where there is no atmosphere

• 62 miles above Earth's surface

• Where humans cannot breathe

What percentage of Earth's atmosphere is nitrogen?

• 78%

• 21%

• 10%

• 5%

What is the correct sequence of colors in a rainbow?

• Yellow, Green, Blue, Indigo, Violet, Red, Orange

• Red, Yellow, Green, Blue, Indigo, Orange, Violet

• Blue, Indigo, Violet, Red, Orange, Yellow, Green

• Red, Orange, Yellow, Green, Blue, Indigo, Violet

What analogy is used to describe the thickness of Earth's atmosphere?

• The shell of an egg

• The skin of an apple

• The crust of a pie

• The cover of a book