​Picture this: a long time ago, all the stuff in the universe was squished into a tiny, super hot and dense point called a singularity. Then, BOOM! The universe started expanding like crazy in a process called cosmic inflation. It's like blowing up a balloon, but a gazillion times more

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What is the big bang theory

As the universe expanded, it also cooled down. Just like when you leave your hot cocoa to cool, things started to come together. Atoms formed, and those atoms gathered to create stars, galaxies, and all the incredible things.

Now, here's the cool part that scientists found: when they look at faraway galaxies, the light they see is a bit reddish which is a microwave background. This is called redshift, and it's like a cosmic clue that tells us the universe is still expanding!

What is REDSHIFT?

​Doppler Effect: Imagine An ambulance getting near you. What do you think it sounds like?
What if it gets farther away?

​The frequency is higher when an object is getting nearer, but lower when it's getting farther away.

What is the Doppler effect?

Blue - Blueshift- means more frequency which means more energy!

Red- Redshift- means less frequency and less energy!


THINK ALSO ABOUT FIRE: Which is hotter, blue or red fire?

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Which color shows more energy?

​Discuss with your partner. (3min)
What does redshift, microwaves, doppler effect, tells us about the universe and the big bang?

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Lets connect the dots.

Voice level 0
10min

Annotate each paragraph with a note.

Finished early, start looking at the questions.

READING TO LEARN

Voice level 2
Work with your partner in answering these questions
10 min to answer all questions.

Work with your partner

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