a material that reflects or absorbs any light that strikes it is ______

what happens when light passes from air into water?

frosted glass and wax paper are ______

the blending of light rays as they enter a new medium is called?

what happens when parallel rays of light hit a smooth surface?

when the surface of a mirror curves inward, like the inside of a bowl, it is called a _______

because the light ray never meet, a concave lens can produce ______

the primary colors of light are ______

colored substance that are used to color other materials are called ______

the colored ring of muscle that control size of the pupil is called the _______

the signals generated by the rods and cones are carried to your brain by the _____.

a person is nearsighted if he or she______?

what instrument use lenses or mirrors to collect and focus light from distant objects?

which device uses lenses to focus light rays and record an image of an object on photographic films?

clear glass, water, and air are examples of what kind of material?

what occurs when parallel rays of light hit a rough or bumpy surfaces?

the transparent front surface of the eyes is called the ______.

rod and cone are the light-sensitive cells on the______?

what type of image does a plane mirror produce?

the speed of sound depends on______?

the amount of energy a sound wave carries per second through a unit area is its_________.

loudness, or sound level, is measured in units called______.

the pitch of a sound that you hear depends on the sound wave's_______.

what is a mixture of sound waves that do not sound pleasing together called?

the basic groups of musical instruments are_______.

a mirage is caused by________as light passes through layers of air at different temperatures.

a convex lens is_________in the center than at its edges.

the hammer, anvil, and stirrup are bones that make up the________ear,

a (an)___________material is one that allows light to pass through it, but not very well.

diffuse_________ occurs when parallel ray of light hit a bumpy, or uneven, surface.

because of refraction , glass prisms separate white light into a visible__________of colors.

as parallel rays of light pass through a (an)___________lens, they are bent toward the center of the lens.

the___________is the part of the eyes that looks black.

a (an)_________is a three-dimensional photograph created by using a laser.

a (an)______________uses a combination of lenses to form enlarged images of very small objects.

the type of image formed by the lens of a camera is a (an)_________image.

if two sounds waves differ in intensity, the wave that is more intense sounds_____________.

the ear canal ends at a tightly stretched membrane called the_____________.

the___________is a liquid-filled cavity in the inner ear.

An echo is a (an)__________sound waves.

the use of sound waves by some bats to navigate and find food is called____________________?

the change in the frequency of waves produced by a moving source is called the_____________.

what type of lens is shown?

what effect does the lens have on parallel light rays passing through it?

on which side of the lens would the focal point appear to be ?

what type of image does this lens form?