Understanding Entropy and the Arrow of Time

What does the behavior of water molecules in a glass demonstrate about our expectations of the universe?

• That water molecules are unpredictable

• That molecular motion is chaotic

• That water molecules defy the laws of physics

• That molecular behavior aligns with our expectations

What does the second law of thermodynamics suggest about the universe?

• The universe tends toward order

• The universe is unpredictable

• The universe tends toward disorder

• The universe remains constant

Why is it unlikely to get a million heads in a row when flipping a coin?

• Because coins are biased

• Because of the laws of physics

• Because there are more ways for it not to happen

• Because it's mathematically impossible

What is one reason given for why today is different from yesterday?

• Because everything has been getting messier since the Big Bang

• Because time moves backward

• Because the universe is static

• Because entropy decreases

What is one of the great unsolved mysteries in physics regarding the universe?

• Why the universe is expanding

• Why the universe was ordered at the beginning

• Why time moves in reverse

• Why gravity exists