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How does a concave lens curve?
A. It curves outward like the outside of a ball.
B. It curves inward like a cave.
C. It is flat.
B. It curves inward like a cave.
What effect does a concave lens have on objects?
A. It makes them look smaller, but shows a wider area.
B. It makes them look larger.
C. It makes them appear blurry.
A. It makes them look smaller, but shows a wider area.
Which of the following uses concave lenses?
A. cameras
B. security cameras
C. peepholes
D. all of the above
D. all of the above
How did Samuel and his grandchildren find their way to Jack?
A. They followed a map.
B. They asked for directions.
C. They followed the sound of Jack's loud complaints.
They found their way to Jack by C. They followed the sound of Jack's loud complaints.
How did Jack jokingly respond to the idea of going on the chair-o-planes?
A. "Do I have to?"
B. "If I don't come back alive, will you feed my fish?"
C. "I'm too old for that ride."
Jack jokingly said, "If I don't come back alive, will you feed my fish?"
What instruments or tools use refraction to work?
A. concave or convex lenses
B. mirrors
C. magnifying glasses
A. concave or convex lenses are tools that use refraction.
What shape does a convex lens have?
A. curves inward like the inside of a bowl
B. curves outward like the outside of a ball
Convex B. curves outward like the outside of a ball.
How do convex lenses affect light rays?
A. They make light rays move away from each other.
B. They force light rays to move toward each other.
Convex lenses B. force light rays to move toward each other.
What happens when objects are close to a convex lens?
A. They look bigger.
B. They look smaller.
C. They look clearer.
Convex lens make objects A. look bigger.
Which of the following instruments use convex lenses?
A. magnifying glasses
B. microscopes
C. telescopes
D. All of the above.
The instruments that use convex lenses is D. All of the above.
Which of the following is an example of an opaque object?
A. eyeglasses
B. tackle box
C. empty glass
B. a tackle box is an example of an opaque object.
What are objects like frosted glass and tracing paper called?
A. transparent
B. opaque
C. translucent
Frosted glass and tracing paper are C. translucent.
What happens to light when it passes through translucent objects?
A. It scatters and makes the objects look fuzzy.
B. It is completely blocked.
C. It becomes brighter.
A. It scatters and makes the objects look fuzzy.
What is refraction?
A. When light is absorbed.
B. When light is blocked.
C. When light waves change speed and direction.
Refraction is C. When light waves change speed and direction.
Why do fish in a river seem closer to the surface than they actually are?
A. because of reflection
B. because of the bending of light waves due to a change in speed
C. because of the water's temperature
The fish seem closer B. because of the bending of light waves due to a change in speed.
What kind of cake did Ethan suggest?
A. Double chocolate cake
B. Vanilla cake
C. Chocolate cake
Ethan suggested A. Double chocolate cake.
How did Jack greet the children?
A. He ignored them.
B. He asked them to leave.
C. He called them his favorite children.
C. He called them his favorite children.
What did Ethan notice about the straw in his glass of water?
A. It looked bent and magnified in the water.
B. It changed color in the water.
C. It was broken.
Ethan noticed A. It looked bent and magnified in the water.
Why does the straw look bent in the water?
A. Because of light refraction
B. Because the straw is flexible
C. Because the water distorts colors
The straw looks bent A. Because of light refraction.
What are objects that light can pass through called?
A. Opaque
B. Translucent
C. Transparent
Objects where light passes through are called B. transparent.
What was Samuel doing before his grandchildren arrived?
A. taking a nap
B. watching TV
C. scrapbooking photographs of his grandchildren
Samuel was C. scrapbooking photographs of his grandchildren.
How many grandchildren does Samuel have?
A. Two
B. Three
C. Four
Samuel has C. four grandchildren.
What was Amy carrying when she arrived?
A. meatloaf
B. chocolate cake
C. a plate of cookies
Amy was carrying B. a chocolate cake.
What was written on the boy’s red T-shirt?
A. "Save Trees. Avoid Homework."
B. "Eat More Chocolate"
C. "Future Scientist"
The boy's t-shirt said, A. "Save Trees. Avoid Homework."
Why did Samuel grimace when Amy mentioned dinner?
A. He wasn't hungry.
B. He wanted to eat chocolate cake first.
C. He didn't like meatloaf.
Samuel grimaced because C. He didn't like meatloaf.