They do that to 'taste' the air around them - which serves to let them know where any potential prey or predators are.
The two tips to the snakes tongue receive scent particles at slightly different times - enabling the snake to determine which way to go to get closer to prey - or further away from predators.
When the snake withdraws its tongue into its mouth, it places the tips into a special area of cells on the roof of the mouth - called "Jacobson's Organ" this passes information to the the snakes brain.
No - Snakes breath with their lungs - just as every other air-breathing animal does!
Snakes breath through nostrils like you and me, but if you mean how do they smell, then the snake's sense of smell is in it's tongue, which is why snakes flick their tongues a lot.
They flick out their forked tongue to gather molecules form the air and then draw the tongue back into the mouth over their organs of taste/smell in the roof of their mouths.
With there tongue! They flick their tongue in and out of their mouth to sence the air when the tongue is out it picks up scents and when it is flicked back into the mouth it rubs against the jacobsons organ which converts the sences and allows the snake to understand its surroundings
Sort of. All snakes, not just rattlesnakes, and some lizards have a Jacobson's organ on the roof of the mouth. Reptiles with this trait flick the tongue out to gather scents and then flick them into the Jacobson's organ.
There is two different ways they drink. 1. They can put their nose in the water and take small drinks 2. They can lick the water with there tongue (the most common way) EDIT: Sorry - but snakes do NOT 'lick the water with there tongue' - They will flick out their tongue to locate a water source, but they do NOT 'lick' water like a dog or cat would !
Assuming you mean 'why do snakes flick out their tongue'... It's basically a sensory organ. The snake is 'tasting' the air. Each side of the the fork is independent from the other. When the snake flicks out its tongue, it collects microscopic scent particles from the air. Withdrawing the tongue into its mouth, there is a sensitive group of nerves in a 'pocket' where the snake inserts the tips. This translates the scent into messages for the snakes brain. The minuscule difference in strength of the scent on either side of the tongue enables the snake to follow the stronger scent to locate its prey.
They are looking for heat signatures from a animal. The tongue tells them what is around them.
Ralphie
They don't ! They flick their tongue - which catches scent particles floating in the air. the tongue is withdrawn into the mouth, and the tips inserted into 'Jacobsons organ' - a sensitive area on the roof of the mouth.
So it can flick the tongue out long to catch prey
yes he did.