make a list of 10 things you know about scientific theory. (5-7 minutes) ◦ what is the definition?...
TRANSCRIPT
Make a list of 10 things you know about scientific theory. (5-7 Minutes)◦ What is the definition?◦ What are some examples?◦ Can scientific theories change?◦ If so, how can scientific theories change?
Prior to reviewing the answers on the next slide, make a list of information that students listed on the dry erase board in the back of the room.
Warm Up
A scientific theory is a well-substantiated explanation of some aspect of the natural world that is acquired through the scientific method and repeatedly tested and confirmed through observation and experimentation.◦ In everyday language, a “theory” is a hunch or a
guess. THIS IS NOT THE CASE IN SCIENCE.
Warm Up Review
Some theories ◦ Evolution◦ Gravity◦ Atomic Theory◦ Cell Theory
Theories rely on inferences.◦ Inferences – a conclusion that you can draw from
the available evidence
Warm Up Review (Continued)
A scientific theory can change….◦ ONLY IF there is new evidence prompting
scientists to revisit the current theory.
NOW WE ARE GOING TO WATCH A TWO MINUTE VIDEO ABOUT THE BIG BANG THEORY.
JUST WATCH – NO NEED TO TAKE NOTES.
IT IS OKAY TO WATCH THE VIDEO TWICE.
Warm Up Review (Continued)
https://school.bighistoryproject.com/pages/console#search/the big bang video
Use Chrome
BIG BANG VIDEO
The Big BangImportant notes to record in your journal are marked with a STAR.
Information that does not have a star is provided to expand on the broad concepts presented throughout the powerpoint.
The Big Bang Theory is the current model that describes the early development of the universe.
The universe started as a little speck of a hot, super-massive, and super dense ball.
Everything that is currently in the universe came from that one tiny speck.
The Big Bang Defined
Every proton, neutron, atom, and so forth came from that hot, super-massive, and super-dense ball.
About 13.7 Billion years, BANG!!! A violent explosion hurled the material
within that ball into all directions of space.
The Big Bang Defined
The universe expanded quickly after the Big Bang and continues to expand today.
As the universe expanded and cooled, things started to form.◦ i.e. – Protons, neutrons, atoms, stars, and galaxies
All of the different elements that exist today developed from that initial ball 13.7 billion years ago.
The Moments After
13.7 billion years ago – BANG!◦ Exactly what triggered the sudden expansion
remains a mystery.
Timeline of the Universe
Gravity formed Electromagnetic forces emerged The universe was made up of fundamental
particles, including quarks, electrons, photons, and neutrons
1 Second later…
The universe takes shape. The protons, neutrons, and electrons come
together to form elements.◦ At this time, the universe is made up largely of
helium and hydrogen, which we will learn later are two of the simplest elements in existence.
3 minutes later…
The universe remained an enormous cloud of hot, expanding gas.
As the universe continued to cool, electrons were able to combine with hydrogen and helium.
Photons were no longer scattered. Time and distance shifted them into microwave lengths.
500,000 years later…
Gravity amplified slight irregularities in the density of the “primordial gas.”
Even as the universe continued to expand, pockets of gas became more and more dense.
Stars were formed within these pockets. Groups of stars became the earliest
galaxies.
1,000,000,000 years later…
Smaller galaxies merged into larger ones, forming different shapes (like spirals or spheres).
Sometimes these mergers were so violent that stars and gas collapsed into a common center, creating black holes.
3,000,000,000 years later…
Within galaxies, stars were born while others died.
When stars die, they create enormous explosions called supernovas.
Supernovas are important to the evolution of galaxies because they distribute all of the common elements (oxygen, carbon, nitrogen) into space.
These explosions also create heavier elements such as gold, silver, and lead.
6,000,000,000 years later…
The sun formed within a cloud of gas in the Milky Way Galaxy.
A vast disk of gas and debris that swirled around this new star formed planets, moons, and asteroids.
5,000,000 years before THE PRESENT
Astronomers estimate that in about 3,000,000,000 years, our galaxy will be swallowed up by one of its nearest neighbors (Andromeda).
Scientists believe that depending on their pathways, these two galaxies will either merge to form one galaxy or they will destroy each other.
What does the future hold?
https://school.bighistoryproject.com/pages/console#search/the big bang video
Use Chrome
Video – How did our universe change?
Read articles in small groups and think about the following questions:
◦ What contribution did this person make to how we view the universe?
◦ What previous information did the person build upon and/or challenge in making the contribution?
◦ What evidence is used to challenge and support he contribution this person made?
◦ What political and social challenges, if any, did this person face when making his contribution.
Readings
Share out information to the class regarding your scientist.
Three minutes per group.
Whole group discussion – who had the bigger influence?
Jigsaw Share Out
Write a letter to a Kindergartener explaining The Big Bang Theory. Be sure to use your timeline notes.
Important vocabulary to include: gravity, electromagnetic forces, supernova, stars, galaxies, scientific theory, The Big Bang
Demonstrate Your KnowledgeTO BE COMPLETED DAY 2
3 things you learned about the Big Bang Theory
2 important points that will be on your test
Write one questions you still have about the Big Bang
3-2-1 Summary Exit Ticket