Etymology and Evidence of Big Bang Theory

The ​ (a)   is the best model used by astronomers to explain the creation of matter, space and time 13.7 billion years ago. There are two major scientific discoveries that provide strong support for the Big Bang theory.

One is ​ (b)   discovery of the relationship between ​ (c)   from ​ (d)   . The second evidence was the discovery of ​ (e)   .

• Big Bang
• Hubble's
• galaxy's distance
• Earth's and it's speed
• cosmic microwave background radiation

Tags

NGSS.HS-ESS1-2

Hubble used a technique pioneered by ​ (a)   to measure the ​ (b)   to remote objects in the sky ​ . Hubble used spectroscopic ​ (c)   data to measure the ​ (d)   these objects were traveling then ​ (e)   their distances from Earth against their speed.

• Henrietta Leavitt
• distance
• redshift
• speed
• graphed

The ​ (a)   away objects are from Earth, the ​ (b)   they are moving ​ (c)   from us. This became known as ​ ​ (d)  

• farther
• faster
• away
• Hubble's law

​ ​ (a)   discovered that the ​ (b)   at which astronomical objects move apart is ​ (c)   to their distance from each other

• Edwin Hubble
• speed
• proportional

According to the Big Bang theory, the universe was initially very ​ (a)   and ​ (b)   . As it ​ (c)   it ​ (d)  

• hot
• dense
• expanded
• cooled

Tags

NGSS.HS-ESS1-2

The ​ (a)   that Penzias and Wilson observed is ​ (b)   heat radiation from the Big Bang. Today, CMBR is very ​ (c)   due to expansion and cooling of the universe. It's only ​ (d)   -270.4 Celsius.

• cosmic microwave background radiation
• leftover
• cold
• 2.725 Kelvin

Tags

NGSS.HS-ESS1-2

​ (a)   were able to calculate the theoretical ​ (b)   of today's Universe and began to search for evidence of it.

• Cosmologists
• temperature

Tags

NGSS.HS-ESS1-2

​ (a)   and Robert Wilson discovered by accident the ​ (b)   in antenna they built to research how ​ (c)   could be reflected off orbiting​ (d)  

• Arno Penzias
• noise
• radio signals
• satellites

Tags

NGSS.HS-PS4-5

Cosmologists believe that tiny temperature ​ (a)   in CMBR temperature are caused by differences in the ​ (b)   of the matter in the early Universe.​ Areas of different ​ (c)   led to the formation of ​ (d)  

• variations
• density
• galaxies and stars

Tags

NGSS.HS-ESS1-2

The ​ (a)   survey produced a detailed temperature map of the entire sky. Colors indicate tiny variations in the temperature of the background radiation. These correspond to places where ​ (b)   formed

• WMAP
• galaxies

Tags

NGSS.HS-ESS1-2