History of the Universe

When can a scientific theory be revised?

• As new evidence presents itself, a theory can change.

• A scientific theory cannot be revised because it has already been proven. 

• A scientific theory cannot be revised because it has already been proven. Once scientists gather evidence about a hypothesis, they generate a theory and then stop researching. 

• Whenever something different is posted on Little Suzie Flu Flu Gingersnap's blog.  She knows all.

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Which term should go in this label?

• Red Shift

• Blue Shift

• Green Shift

• Yellow Shift

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Which term should go in this label?

• Red Shift

• Blue Shift

• Green Shift

• Yellow Shift

Examine the diagram.  How does the ambulance sound to Little Suzie Flu Flu and Fido in the picture to the RIGHT?  Why?

• The ambulance sound is a lower pitch because the wavelengths are lower frequency.

• The ambulance sound is higher pitch because the wavelengths are higher frequency.

• The ambulance sound is lower pitch because there is increased energy in the wave.

• The ambulance sound is higher pitch because there is decreased energy in the wave.

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NGSS.HS-PS4-1

Maverick and Goose are flying their jets over Delmar, DE.  According to the picture above, where would the highest frequency waves be located?

• There is not enough information from the diagram to make a determination.

• The highest frequency wave is at the front of the plane near the nose because the waves have a shorter wavelength.

• The highest frequency wave is located in the rear of the plane near the tail because the waves have a longer wavelength.

• The highest frequency wave is at the center of the plane because Maverick and Goose are such awesome pilots.

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NGSS.HS-PS4-1

How did the discovery of red and blue shift impact our understanding of the history of the universe?

• Red and blue shift allowed scientists to calculate the age of the universe, and prove that the universe was still expanding.

• Red and blue shift allowed scientists to calculate orbital pathways of planets in our solar system, and prove that the universe was still shrinking.

• Red and blue shift allowed scientists to calculate the gravitational constant for earth, and proved that spectral signatures exist.

• Red and blue shift allowed scientists to calculate the eccentricity of a circle, and proved that gravity was an important part to the formation of stars.

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Choose the following progression with the appropriate terms in order

Red Shift - Wavelength - Frequency - Pitch:

• Lower - Lower -Lower -Longer

• Lower - Longer - Lower -Lower -

• Longer - Lower - Lower -Lower

• Lower - Lower - Longer - Lower

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NGSS.HS-PS4-1

Choose the following progression with the appropriate terms in order

Blue Shift - Wavelength - Frequency - Pitch:

• Higher - Higher - Higher - Shorter

• Higher - Higher - Shorter - Higher

• Higher - Shorter - Higher- Higher

• Shorter - Higher - Higher - Higher -

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NGSS.HS-PS4-1

Desmond and Lucian are viewing stars through a telescope in Ocean City, MD.  As they look through the lens, they notice that all of the stars are giving off a reddish hue (appear red).  Desmond says to Lucian, "Wow!  Leavitt and Hubble were correct!  Most of the stars are red-shifted!"  Lucian agrees with Desmond and says:

Choose TWO responses

• "Yes!  This is how they proved that the universe was still expanding!"

• "Yes!  This is how they proved that the universe is still shrinking!"

• "Yes!  Red shift means that all of those stars are moving toward us, making the wavelengths shorter!"

• "Yes!  Red shift means that all of those stars are moving away from us, making the wavelengths longer!"

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Place the life cycle of a star in order from BIRTH of a star to DEATH of a star.

• Main Sequence Star, Supernova, Red Super Giant, Protostar, Remnant

• Supernova Remnant, Protostar, Red Super Giant, Main Sequence Star

• Protostar, Main Sequence Star, Red Super Giant, Supernova Remnant

• Main Sequence Star, Red Super Giant, Protostar, Supernova Remnant