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Science Launch G4 / Week 10 / Thursday
4/6
Week 10 Β· Senses and Signals

Thursday

Super senses
// How animals take in information and respond
⏱ about 15 min

Thursday: Super senses

On a summer evening, Rocket and Raven sit on the porch steps. Little dark shapes zigzag over the yard.

"Bats!" Rocket says. "How do they catch bugs in the dark?"

Later, at the reptile house, a snake flicks its forked tongue in and out, in and out.

"Is it tasting the air?" Rocket asks.

"What do you notice about how each animal checks its world?" Raven asks.

Nova hums. "My hint," she says. "Different animals have senses for different kinds of information."

Senses made for special jobs

Different sense parts are specialized. That means each one is built for a certain kind of information.

Bats use echolocation. They make high sounds that people cannot hear.

The sounds bounce off objects. Then the echoes return to the bat's ears.

When a bat detects an insect, it makes quick calls to find exactly where it is.

Snakes use their tongues to collect smells from the air. The tongue touches a special smell organ in the mouth.

Some snakes, called pit vipers, have heat pits. These sense tiny changes in warmth from nearby animals.

HOW A BAT FINDS AN INSECT
  • ?The echo returns to the bat's ears
  • ?The bat swoops in
  • ?The bat makes quick calls to pinpoint the insect
  • ?The sound bounces off the insect
  • ?The bat makes a high sound
WHY THIS EXERCISEEcholocation turns sound and echoes into information about where things are.
StatementTrue or false?
Bats make sounds and listen for echoes.?
Snakes use their tongues to collect smells.?
Every animal senses the world in exactly the same way.?
Pit vipers can sense heat.?
WHY THIS EXERCISEAnimals have different sense parts for different kinds of information.
Finding things by making sounds and listening for echoes is called ____.
WHY THIS EXERCISEEcholocation is a sound based sense that helps bats move and hunt in the dark.

Matching sense to job

A bat hunts at night using sounds and echoes.

A snake tastes the air with its tongue to follow smells.

A pit viper can sense the warmth of an animal nearby.

Each sense part fits the information that animal needs.

SUPER SENSE MATCH
  • Read the question.
  • Tap your answer.
Which sense does a bat use to hunt in the dark?
What does a snake's tongue collect from the air?
What do a pit viper's pits sense?
Bats make high sounds that people cannot ____.
When sound bounces back, it is called an ____.
HOW A SNAKE FOLLOWS A SMELL
  • ?The snake moves toward the smell.
  • ?The tongue collects smells from the air.
  • ?The tongue touches a smell organ in its mouth.
  • ?The snake flicks out its tongue.
  • ?The snake's brain processes the smell.
WHY THIS EXERCISESense, brain and action work together in snakes too.
Try it
Stand in a hallway or a room with hard walls.
Clap once loudly. Listen closely.
Do you hear the sound bounce back? That is a small echo.

What super senses! Tomorrow we see how memories help animals decide what to do.

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