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Worksheets4th Grade Science: Sense Receptors and Eyes
Total questions: 23
Worksheet time: 23mins
Where is the light source coming from that enabled the scientists to take this photo?
the stars
the sun
a spotlight
the owl
This owl can see objects at night because:
It has special animal radar.
Light from the stars and moon reflects off forest objects.
Light left over from the day reflects off forest objects.
It is blind during the day.
The more light that reflects off objects in the forest:
The clearer the owl will see those objects.
The harder it will be for the owl to see those objects.
The fewer objects there will be to be seen
The more confused the owl will become.
If the forest were absolutely dark, with no light coming from any source, then the owl would not be able to see any objects because:
owls are blind at night.
owls can only see during the day.
too much light would be reflected off those objects.
no light would be reflected off those objects.
Read this statement: “Scientists assume that all animals can see objects because light is reflecting off or coming from them.” Which answer below best explains why scientists assume that?
Scientists have tested every animal’s eyes.
Scientists are just guessing.
Scientists assume that the basic laws of nature are the same everywhere in the universe.
Scientists have studied light reflecting off of every object in the universe.
A long stalk-shaped sense organ on the head of an insect.
ear
taste bud
ear drum
antenna
sense receptor
A structure in the nervous system that detects stimuli.
ear
taste bud
ear drum
antenna
sense receptor
A structure on the tongue that has sense receptors that detect sweet, sour, salty, and bitter chemicals in food.
ear
taste bud
ear drum
antenna
sense receptor
A structure on the tongue that has sense receptors that detect sweet, sour, salty, and bitter chemicals in food.
ear
taste bud
ear drum
antenna
sense receptor
A sense organ that contains receptors for detecting sound.
ear
taste bud
ear drum
antenna
sense receptor
A thin elastic membrane that separates the outer ear from the middle ear.
ear
taste bud
ear drum
antenna
sense receptor
This wolf just saw the mouse. Answer the questions to find the path that a message takes through the wolf’s body. When the wolf sees the mouse for the first time, where does the message from the eyes go?
To the spinal cord
To the brain
To the legs
To the mouth
Since the brain is far from the legs, which structure connects the brain to the leg muscles?
To the spinal cord
To the brain
To the legs
To the mouth
Which part of the nervous system carries messages throughout the body?
muscles
bones
brain
nerves
Check the boxes with examples of reflexes.
sneezing
yawning
bird migration
blinking
building a nest
Check the boxes with examples of instincts.
sneezing
yawning
bird migration
blinking
building a nest
The way an animal acts is its
brain
behavior
instinct
memory
nerve
An organ in the nervous system that is the control center of the body.
brain
behavior
instinct
memory
nerve
A behavior that an animal is born knowing how to do.
nerve
instinct
reflex
spinal cord
memory
Information stored in the brain that an animal remembers from its senses or by doing a learned behavior.
nerve
instinct
reflex
spinal cord
memory
A structure in the nervous system that carries messages from sense organs to the spinal cord and brain and from the brain and spinal cord to muscles.
nerve
instinct
reflex
spinal cord
memory
A behavior that does not involve the brain.
nerve
instinct
reflex
spinal cord
memory
A long bundle of nerves that connects the brain to the rest of the body. The spinal cord lies inside the backbone, which protects it.
nerve
instinct
reflex
spinal cord
memory
