A material that does not allow light to pass through it is
opaque
A material that allows light to pass straight through it is
transparent
If a material allows light to pass through it, but you cannot see objects on the other side of it, that material is
translucent
Light always travels in a _____ line.
straight
_____ light is a mixture of colored lights.
White
The series of colored bands that are created when sunlight is separated is the ____
spectrum
If all of the colors of the spectrum are _____ by an object, then the object is black.
absorbed
Bending of light rays as they enter a new material is called
refraction
A blue dress appears blue because the dress is _____ blue light
reflecting
The electric light bulb was invented by
Thomas Edison
The transparent layer covering the front of the eyeball is the
cornea
The opening that allows light to enter the eye is the
pupil
The muscles that regulate the size of the pupil are found in the
iris
The light-sensitive lining covering the inside of the eyeball is the
retina
The structure behind the pupil that refracts and focuses the light it receives is the
lens
The large bundle of fibers that carries the message of what the eye has seen to the brain is the
optic nerve
They type of vision in which both eyes work together to produce an image of the same object is
binocular vision
Many nocturnal animals have an extra layer of reflecting cells behind the retina called the
tapetum
A mirror which bulges toward the viewer and makes things look smaller is a ____ mirror
convex
A mirror which bulges away from the viewer and makes things look bigger is a ____ mirror.
concave
A lens which refracts light rays and brings them into focus is a ____ lens
convex
A lens which scatters light rays is a ____ lens
concave
A lens which is shaped like an hourglass is
concave
A lens which is shaped like an egg is
convex
Sir Issac Newton’s reflecting telescope used a ____ mirror and a convex lens.
concave
List the colors of the spectrum in order.
red, orange, yellow, green, blue, violet
Insects that move from place to place with the changing seasons are
migrating
When an insect blends in with its surroundings, it is an example of
camouflage
An insect with a straight line down its abdomen and chewing mouth parts is a
beetle
A young insect that looks exactly like the adult is a
nymph
A male bee is called a
drone
Animals which eat meat are
carnivores
Animals which chew the cud are
ruminants
The largest group of mammals is
rodents
Whales and dolphins have a layer of ___ instead of fur.
blubber
Animals that are active only at night are
nocturnal
Name one egg-laying mammal.
echidna or platypus
The odor of the skunk is produced by its ___ glands
musk
chimpanzees, gorillas, and monkeys all belong to the order of mammals called
primates
Animals whose species no longer exist are
extinct
Explain the importance of insectivores as part of God’s plan for maintaining the balance of nature.
Insectivores are part of God’s plan for keeping the insect population in check. Half of all living things are insects, and just one insect may lay hundreds of eggs. The insects provide food for the insectivores, and the insectivores prevent insects from overpopulating the earth.