Mrs. Deininger 7th Grade Physical Science

Don’t Forget... Contestants

Although they give answers in the form of questions on the TV show, you do not need to do this. You do need to take notes - these are model test questions!

WavesThe Eye Optical Tools PotpourriReflects/ Absorbs

The material through which a wave travels is called the… a. medium b. amplitude c. crest d. vibration Waves for $100

a. medium Back to Game

Which of these is NOT a part of the electromagnetic spectrum? a. Visible light b. Mechanical waves c. Gamma rays d. Infrared waves Waves for $200

Back to Game b. Mechanical waves

Waves for $300 The __________ is a measure of how much a ray bends when it passes from one medium to another.

Back to Game Index of refraction

Waves for $400 ________ rays are used to treat patients with cancer to kill cancer- ridden cells.

Back to Game Gamma

Waves for $500 True or False: All electromagnetic waves have the same speed in a vacuum.

Back to Game True

The Eye for $100 The transparent front surface of the eye is called the… a. retina b. pupil c. iris d. cornea

Back to Game d. cornea

The Eye for $200 The structure that controls the amount of light that enters your eye is the… a.retina b.lens c.iris d.cornea

Back to Game c. iris

The Eye for $300 ____________ are cells in the retina that respond to dim light.

Back to Game Rods

The Eye for $400 The signals generated by the cells in the retina travel to the brain through the _________.

Back to Game Optic Nerve

The Eye for $500 True or False: The lens of your eye is a concave lens.

Back to Game False What kind of lens is it?

Reflects/Absorbs for $100 A material that reflects or absorbs all the light that strikes it is… a. opaque b. transparent c. translucent d. concave

Back to Game a. opaque

Reflects/Absorbs for $200 The color of an opaque object is the color of… a.The cones in the eye. b.The light it reflects. c.The rods in the eye. d.The light it absorbs.

Back to Game c. The light it reflects.

Reflects/Absorbs for $300 A green apple reflects __________ light, and absorbs ___________ and _____________ light.

Back to Game Green; Blue; Red

Reflects/Absorbs for $400 People wear white or light- colored clothes when it is really warm out because white ____________ all light rays.

Back to Game Reflects

Reflects/Absorbs for $500 Under a red filter, a blue object seems… a.Dark blue b. Black c. Red d. Green

Back to Game b. Black

Optical Tools for $100 A plane mirror has a(n)… a. curved surface b. focal point c. index of refraction equal to 1 d. flat surface

Back to Game d. Flat surface

Optical Tools for $200 A device that magnifies tiny objects such as cells is a… a. Telescope b. Microscope c. Camera d. Plane mirror

Back to Game b. microscope

Optical Tools for $300 What type of telescope consists of two convex lenses? a.Reflecting b. Compound c. Electron d. Refracting

Back to Game d. refracting

Optical Tools for $400 A(n) ____________ lens is thinner in the center than at the edges.

Back to Game Concave

Optical Tools for $500 True or False: Both a microscope and a reflecting telescope use a combination of lenses to produce a magnified image.

Back to Game False What kind of telescope is it?

Potpourri for $100 Complementary colors are… a.Colors that combine to form secondary colors. b.All the colors of the rainbow. c. any two colors that combine to form white light. d. colors that cannot be split into component colors.

Back to Game C. Any two colors that combine to form white light.

Potpourri for $200 ____________ images are right-side up.

Back to Game Virtual

Potpourri for $300 The law of reflection states that the angle of incidence equals the angle of reflection.

Back to Game True

Potpourri for $400 True or False: Three colors of light that can be combined to make any other color are called complementary colors.

Back to Game False What word would make it true?

Potpourri for $500 True or False: The lens found in the human eye is the same shape as the lens used in a magnifying glass.

True They are both what kind of lenses?

How much do you want to risk?

What percentage of people have fingerprints with loops?

60%

Which team won?