Get a free trial until June 30, 2026!
New members get full access to our science units, hands-on activities, mini-lessons, & more!

New members get a full, free trial through June 2026!

Slide Image
Slide Image
This water is so salty that people float in it without even trying! Do you think something REALLY heavy will float?
5
Check it out! Even with a heavy rock on top of him, this person can still float!
5
Salt can help other things float too! Try this: drop an egg in water and it sinks. Add salt to the water—it floats!
5
Slide Image
You know that farmers raise animals or grow plants, but SALT farms exist too. What do you think those look like?
4
Hint: if salt water dries up (evaporates), it leaves salt behind like this! Does this give you any ideas?
4
Here’s a salt farm! When ocean water dries up, salt is left behind. The salt in your kitchen might come from here!
4
Hmm…all of these animals are licking rocks! Why do you think they’re doing this? What is on the rocks?
3
They’re licking salt off of rocks! Animals and people need some salt to survive. A farmer gave this lamb a salt block!
3
Slide Image
Check out this pink lake in Australia! This lake has tons of salt in it. But why would a salty lake be pink? Any ideas?
2
The salty lake is filled with tiny pink creatures. Some look like this. They all make the water look pink!
2
What kind of birds are these? (You’ve seen them before, but something seems different…)
1
Slide Image
They’re flamingos! Their feathers only turn pink IF they eat a certain thing. Can you guess what they eat?
1
Flamingos eat the tiny pink creatures that love salt! So, salt gives us bright pink flamingos!
1
Slide Image

Voting for this episode is now closed. Would you like to vote on the most recent poll?

We pulled three questions from our jar. Which question do you want to explore?

Illustration of a glass jar with a 'questionmark' label
  • Why can some animals see in the dark?

    -Bella, 5th Grade

  • Why can vultures eat dead stuff and not get sick?

    -Pranav, 4th Grade

  • Are black cats really bad luck?

    -Vincent, 3rd Grade

Extensions

Is the video not playing properly?

Please follow these steps:

  1. Very rarely a video will fail to completely load in your browser. Try to reload this page to see if that fixes the problem.
  2. If reloading does not help, try our other video player .
  3. If the video still fails to play, open this video in a new tab

Why is the ocean salty?

Watch the video to discover the answer and don't forget to vote for next week's question. There are mysteries all around us. Have fun and stay curious!