A ​ ​ Theory is an ​ (a)   or model backed by ​ ​ (b)   data.

• explanation
• scientific
• proof
• law

Why do theories change?

• new technology or tools are invented

• people get tired of old theories

• someone comes up with a new thought

• theories never change

The Big bang Theory is ​ ​ (a)   ​

• an explanation of how Earth stays in orbit
• a theory of how cars were invented
• a theory of how the universe was formed

Tags

NGSS.HS-ESS1-2

True or False: The universe is still expanding

• False

• True

Tags

NGSS.HS-ESS1-2

How does blowing up a balloon demonstrate the Big Bang Theory?

• Because it can deflate

• This is ridiculous, a balloon can't demonstrate the Big Bang Theory

• The balloon expands, and can be popped simulating the "big bang."

Tags

NGSS.HS-ESS1-2

Match the following words with the definition

• galaxies, planets, and stars

• Geocentric

• theory of origin of universe

• Universe

• Universe model with earth at center

• Big Bang

• system of stars, planets, gas, and dust

• Galaxy

• Universe model with sun at the center

• Heliocentric

Tags

NGSS.HS-ESS1-2