Sharks

Here are some quick facts you surely didn't know about sharks:

1. Sharks have been around for 400 million years.
2. There are over 400 different species of sharks.
3. Sharks see in monochrome.
4. Shark wounds heal quickly.
5. Sharks can smell a drop of blood in 1 million drops of water.
6. Sharks never run out of teeth, if they lose one, another comes in front of rows and rows of back teeth. A shark can grow and lose 30,000 or more teeth in its lifetime!
7. ​The smallest shark in existence is the Dwarf Lantern Shark, which is about 20 centimeters, while the largest shark in existence is the Whale Shark, which is about 10 meters.
8. The average lifespan for most shark species is 20 to 30 years.
9. Sharks sleep with their eyes open. Only one part of their brain is asleep at a time, so they can continue to breathe while they rest.
10. Sharks do not take care of their young. A young shark is on its own from the moment it is born.

This ebook has interesting information about the world's biggest sharks. It is followed by questions and the relevant answer key. Have fun teaching!