Apply Its_Middle School Physical Science - Mastery Assess It_7

10/20/2016 Apply Its_Middle School Physical Science Mastery Assess It_7

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Mastery Assess It 7

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1. Which of these materials on the walls of a room would work BEST to keep sound from making an echo?

a. marble

b. glass

c. carpet

d. wood

2. Which of these is a way that sunglasses help protect the eyes?

a. refracting more light rays into the eyes

b. reflecting light rays away from the eyes

c. reflecting more light rays into the eyes

d. refracting light rays away from the eyes

3. Which of the following devices use radio waves? Select all that apply:

a. Wireless Internet You are correct! Are there any others listed?

b. Cell phones You are correct! Are there any others listed?c. Radiocontrolled helicopters

You are correct! Are there any others listed?

4. Some students were on a tour exploring the inside of a cave. While the students were in the cave, they realized they heard an echo every time thatthey spoke. Which MOST likely caused the echo to occur?

a. the accumulation of the sound waves

b. the diffraction of the sound waves

c. the reflection of the sound waves

d. the refraction of the sound waves

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5. Anabel sits in front of a mirror.

She is able to see herself in the mirror because light is

a. refracted by the mirror.

b. absorbed by the mirror.

c. reflected by the mirror.

d. blocked by the mirror.

6. A light beam reflects off a plane mirror at an angle of 50° from the normal as shown in the diagram.

Which statement describes the angle of incidence for the light beam?

a. The light beam moves through Quadrant A at an angle of 40° from the normal.

b. The light beam moves through Quadrant B at an angle of 50° from the normal.

c. The light beam moves through Quadrant A at an angle of 50° from the normal.

d. The light beam moves through Quadrant B at an angle of 40° from the normal.

7. Why does a leaf look green in the summer?

a. The leaf uses green light to make food in its cells.

b. The leaf reflects green light and absorbs other colors of sunlight.

c. The leaf produces green light in its cells.

d. The leaf absorbs green light.



8. Maria was making a drawing showing the different parts of a wave.

Which number should she label as the amplitude of the wave?

a. 2

b. 4

c. 1

d. 3

9. Computers are smarter than humans.

a. True

Great effort, but the statement is false, Computers can only do what is programmed or communicated with them to do. They don't have a humanbrain.

b. False

You are correct! The statement is false because computers can only do what is programmed or communicated with them to do. They don't have ahuman brain.

10. When light is bounced off a mirror, the light is

a. refracted.

b. reflected.

c. diffracted.

d. absorbed.

11. Which object BEST reflects light?

a. white floor

b. black sweater

c. brown carpet

d. gray door

12. Binary numbers use only the numbers 1 and 2.

a. True

Great effort, but the statement is false, It does sound misleading, because when you think "binary," you think "2," but binary numbers actually usethe numbers 1 and 0.

b. False You are correct! Binary numbers use the digits "1" and "0."

13. A pixel can be which of the following?

a. Light or dark You are correct! A pixel can be light or dark!b. Analog

Great effort, but pixels are basic units of programmable color. Analog and digital signals are waves.c. Digital

Great effort, but pixels are basic units of programmable color. Analog and digital signals are waves.d. All of the above

Great effort, but all of the above answers are not correct.



14. Selma put a leaf on a piece of colored paper. She placed the paper with the leaf on a windowsill. A few weeks later, Selma removed the leaf fromthe paper. The place where the leaf covered the paper was still dark, but the area around the leaf had faded.

What caused the paper to fade?

a. light

b. heat

c. wind

d. electricity

15. When a child stands directly in front of a fulllength mirror, the child sees a reflection of himself. However, when the child stands off to one side ofthe mirror, the child sees an object reflected from a different place in the room.

Why does this occur?

a. Light always reflects directly back to its source.

b. Light reflects at an angle equal to that of the incoming light.

c. Light reflects objects in the same way that the eye sees them.

d. Light always reflects in a way that makes objects seem smaller.

16. Campers shouted toward a canyon wall. What characteristic of sound BEST explains why the campers heard an echo?

a. Sound waves were absorbed by the canyon wall.

b. Sound waves reflected off the canyon wall.

c. Sound waves were refracted around the canyon.

d. Sound waves traveled slowly down the canyon.



17. What is a limitation of WiFi?

a. Devices such as cell phones, computers, and tablets can be connected to the internet without wires. Great effort, but the ability to connect to the internet without wires is a definite advantage of WiFi.b. It uses radio waves to connect a computer, cell phone, or table to the internet

Great effort, but connecting electronic devices to the internet is a definite advantage of WiFi, not a limitation.c. WiFi uses radio signals, which are not reliable sources for connecting devices to the internet.

Great effort, but, although limited by distance form the source, radio waves are very reliable sources for connecting devices to the internet. d. Any device using WiFi is limited by the distance it is located from the source.

You are correct! Because radio waves must travel through a medium, they are limited by distance from the source.

18. What base number system is the binary number system?

a. Base10 number system Remember, binary only uses 2 numbers, 0 and 1.b. Base5 number system

Remember, binary only uses 2 numbers, 0 and 1.c. Base4 number system

Remember, binary only uses 2 numbers, 0 and 1.d. Base2 number system

Correct! Binary only uses 2 numbers.

19. This illustration shows three different waves traveling through the same medium.

How do the waves differ from one another?

a. The waves travel at different speeds.

b. The waves are a different distance from the source.

c. The waves have different wavelengths.

d. The waves carry different amounts of energy.

20. CDs, MP3s, and BluRays are all examples of what type of information?

a. Digital You are correct! Digital symbols are examples of CD's MP3's and Blu Rays!b. Analog and Digital

Great effort, but these storage systems do not store analog information.c. Analog

Great effort, but these storage systems do not store analog information.d. None of the above

At least one of the answers above is correct.



21. Frank shined a beam of light at the surface of a mirror. A piece of paper above the mirror was lit up.

What caused the light to shine on the paper above the mirror?

a. The light was reflected.

b. The light was amplified.

c. The light was diffracted.

d. The light was refracted.

22. Which object is made to reflect light?

a. window

b. telescope

c. mirror

d. eyeglasses

23. Which is an example of light being reflected?

a. using a magnifying glass

b. taking a picture

c. using eyeglasses

d. looking into a mirror

24. What does a mirror do to light that causes objects to appear backwards?

a. reflects

b. absorbs

c. refracts

d. blocks

25. What process forms an image in a mirror?

a. refracting light

b. reflecting light

c. transmitting light

d. absorbing light



26. A light beam strikes a plane mirror at an angle of 30° from the normal as shown in the diagram.

Which diagram shows the angle of reflection for the light beam?

a.

b.

c.

d.

27. How does the color of an object affect the amount of energy it receives from sunlight?

a. Light colored objects reflect more light and become warmer than darker objects.

b. Light colored objects absorb more light and become warmer than darker objects.

c. Dark colored objects reflect more light and become warmer than lighter objects.

d. Dark colored objects absorb more light and become warmer than lighter objects.



28. The diagram shows light waves hitting a mirror.

Which diagram shows how the light waves MOST likely will be reflected off the mirror?

a.

b.

c.

d.



29. This illustration shows a sound wave traveling from a tuning fork through a medium.

How can the wavelength be determined?

a. by comparing the width of the bands at X and at Y

b. by measuring the distance between a point labeled X and a point labeled Y

c. by measuring the distance between two points labeled X

d. by comparing the number of particles at X and at Y

30. A science class is divided into two groups. The first group plays loud music in a room that has thick carpet on the ceiling, walls, and floor. Thesecond group is outside of the room but does not hear the music because the sound was

a. absorbed by the carpet.

b. refracted by the carpet.

c. reflected by the carpet.

d. amplified by the carpet.

31. Which object works BEST when reflecting light?

a. binoculars

b. mirror

c. camera

d. eyeglasses

32. The diagram shows what happened when light hit a mirror.

Which statement BEST explains the diagram?

a. The light refracted.

b. The mirror scattered the light.

c. The light reflected.

d. The mirror absorbed the light.



33. A city put up a mirror at a sharp curve in a road.

How will the mirror MOST likely benefit drivers?

a. The drivers will be able to see around the bend.

b. The mirror will make drivers slow down.

c. The drivers will be able to see themselves.

d. The mirror will make the road look wider.

34. What bit pixel type will have the greatest amount of color possibilities?

a. 64bit color pixel Correct! Of the options given, this one would provide the greatest number of color possibilities.b. 8bit color pixel

Great effort, but the more pixels you have, the greater the color possibilities!c. 32bit color pixel

Great effort, but the more pixels you have, the greater the color possibilities!d. 16bit color pixel

Great effort, but the more pixels you have, the greater the color possibilities!



35. Study the table below. What is the ASCII code for an uppercase "M?"

a. 109 Great effort, but if you study the table, you should find that this is the ASCII code for a lower case "m."b. 077

You are correct! If you study the table, you find that the ASCII code for an uppercase "M" is indeed 077!c. 111

Great effort, but if you study the table, you should find that this is the ASCII code for a lower case "o."d. 078

Great effort, but if you study the table, you should find that this is the ASCII code for an uppercase "N."

36. What types of signals can be isolated so you can only find particular information that you are looking for?

a. Digital You are correct! Digital signals can be isolated!b. Analog

Analog signals cannot be separated.c. Analog and digital signals

Great effort, but analog signals cannot be separated.d. None of the choices listed are correct.

Great effort, but at least one of the answers above is correct.



37. Which of the following best describes the difference between digital and analog?

a. Analog signals represent continuous information, while digital signals are many small, separate bits of information strung together. You are correct! Analog signals are continuous, while digital signals are not. b. Analog signals are many small, separate bits of information strung together, while digital signals represent continuous information.

Great effort, but analog signals are actually made of continuous information, while digital signals are small, separate bits of information strungtogether.

38. Which acts like a tube that transmits information in pulses of light energy?

a. Digital wire Digital signals are carried as electrical impulses on copper wire.b. Fiber Optic wire

Correct! Fiber Optic cables use light to carry signals.c. Copper wire

Copper wire carries electrical signals, but not in the form of light.d. Analog wire

Analog signals are carried as electrical impulses on copper wire.

39. Which of the following diagrams shows light being reflected?

a.

b.

c.

d.

40. The number 101 means what in binary code?

a. 101 Think about how the binary number system works: 1, 10, 11, 100,.....b. 2

Think about how the binary number system works: 1, 10, 11, 100,.....c. 5

Correct! 101 is binary for 5!d. 10

Think about how the binary number system works: 1, 10, 11, 100,.....

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Apply Its_Middle School Physical Science - Mastery Assess It_7