Physical Science Part 2 Exam Study Guide

What is a lens? Fill in the blank: A lens is a __________ material with a curved surface that reflects light rays.

• transparent

• opaque

• metallic

• reflective

What does a convex lens do? Fill in the blank: A convex lens __________ light rays to form images.

• focuses

• scatters

• blocks

• reflects

A concave lens is:

• a lens that is thicker at the center than at the edges

• a lens that is thinner at the center than at the edges

• a lens that converges light rays

• a lens that forms only real images

Fill in the blank: The ______ is the inner lining of the eye converting light into electrical signals that the brain interprets; it contains rods and cones.

• Retina

• Cornea

• Lens

• Iris

Fill in the blank: The ______ is the colored ring of muscle that controls the size of the pupil.

• Iris

• Cornea

• Retina

• Lens

Fill in the blank: The ______ carries signals generated by rods and cones to your brain.

• Optic nerve

• Cornea

• Retina

• Lens

Fill in the blank: The ______ is the transparent covering on the eyeball where light enters the eye.

• Cornea

• Retina

• Lens

• Iris

Where is the image formed in the eye?

• Image is formed at the retina.

• Image is formed at the cornea.

• Image is formed at the iris.

• Image is formed at the lens.

Fill in the blank: A telescope uses ______ and lenses to gather more light from far away objects than the eye does.

• mirror

• prism

• filter

• antenna

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Fill in the blank: A microscope uses two ______ lenses with short focal lengths to magnify small, close objects.

• convex

• concave

• cylindrical

• planar