Senses
Name the 5 senses.
Sight, smell, taste, hearing, touch
Part of the nervous system made up of the brain and spinal cord
Central nervous system
Light always travels in a ______ line.
Straight
Binary code is a pattern of ___ and ___ that computers use to transmit information.
If you see a cat in the dark it might look like their eyes are glowing. But, do eyes actually give off light?
NO! It is just light bounce off a reflective part of the cat's eye.
Organs that gather information from outside the body.
Sensory organs
The part of the human eye where light passes through (it is on the front of the eyeball)
Cornea
A magnifying lens is an example of a __________ lens.
Convex (makes things bigger)
Radio waves are sent over long distance from one transmitting station to another using ____________.
Communication satellites
Elephants have large ______. These allow them to _______ better.
ears, hear
The process of finding an object using reflected sounds or echoes.
echolocation
A thick band of nerves inside the spine
Spinal cord
What time of lens is thinner in the middle?
Concave (it makes things look smaller)
A telegraph can be used to transmit information using what type of early communication?
Morse code
Forward-facing eyes allow animals to judge the _________ and _________ of objects.
distance and depth
Name at least 2 animals that use echolocation.
Bats, dolphins, whales
Part of the human eye that sends signals to the brain to be interpreted as images (at the back of the eyeball)
Retina
Give examples to explain the difference between reflection and refraction.
Reflection (mirror - light waves bounce off the surface)
Refraction (flower stem in a glass of water - light waves bend as they pass into another substance)
These devices convert sound into electrical signals that are transferred through cables and then converted back into sound on the other end.
Telephones
Why do nocturnal animals usually have larger eyes?
Nocturnal animals are awake at night and large eyes gather more light, so they can see better.
Name the 5 sensory organs that match with the 5 human senses.
eyes, nose, skin, tongue, ears
Name the correct path of sensory information from the environment (outside world) to the brain.
Words to use: peripheral nerve, brain, sensory organ, spinal cord
Sensory organ, peripheral nerve, spinal cord, brain
Give an example of a transparent item, a translucent item, and an opaque item. Explain the difference between those 3 words.
Transparent - lets all light through
Translucent - lets some light through
Opaque - lets no light through
Mrs. M will judge examples
Explain why some images (imagine an old photo or TV vs. a newer photo or TV) look clearer than others.
The more pixels an image has, the clearer it will look.
Many animals have quick reflexes. What is a reflex? Give an example if you have time.
A quick reaction that occurs without thinking (blinking, breathing, pulling away from a hot stove)