Why is the sky blue?

What color might short wavelength light appear to us? 

• green 
• blue
• red
• orange

this text describes what happens when light hits particles of different sizes. Why might the text include this description? 

• To persuade the reader to agree with the author about how light and particles interact. 
• To present evidence for different views about how light and particles interact. 
• To inform the reader about how light and particles interact. 
• To compare and contrast two ideas about how light and particles interact. 

Tags

NGSS.MS-PS4-2

When light strikes particles that are larger than its wavelength, the light's path may be altered. The gas molecules in Earth's atmosphere affect the path of the light with a shorter wavelength(blue light). Based on this evidence, what conclusion can be drawn

• the gas particles are smaller than the wavelength of blue light
• the gas particles are larger than the wavelength of blue light
• the gas particles are larger than the wavelength of red light
• the gas particles are smaller than the wavelength of violet light

Tags

NGSS.MS-PS4-2

If Earth had no atmosphere at all, what would the sky mostly look like? 

• red, with a very bright star
• violet, with a very bright star
• blue, with a very bright star
• dark, with a very bright star

what is the main idea of this text?

• Long wavelength light appears to us as red, while short wavelength light appears as blue
• The main reason why the sky looks blue is that our eyes are better at detecting blue light than light of other colors
• The sky appears blue because gas molecules in the atmosphere scatter the wavelength of light that appears blue to us. 
• the atmosphere contains many particles and gases, mainly nitrogen and oxygen

why might the author have chosen to include diagrams in this text?

• To provide interesting information that does not have to do with the main idea of the text. 
• to distract readers from the discussion of some of the technical concepts in the text. 
• to suggest that the information in the text can be interpreted in different ways
• to highlight and clarify concepts that are important to understanding the main idea of the text

Tags

NGSS.HS-ETS1-3

NGSS.HS-PS3-2

choose the answer that best completes the sentence: 
The gas molecules in the atmosphere scatter shorter wavelength light, ________ the longer wavelength light is largely unaffected by the atmosphere. 

• but
• similarly
• then
• therefore

Tags

NGSS.MS-PS4-2