ThinkPairShare FCAT Practice During this activity students will

Think-Pair-Share FCAT Practice During this activity, students will have individual time to think about a question related to FCAT 2. 0. They will then pair up with a partner to share their thoughts. Finally, the pairs will select one major explanation to share with the entire class.

Think about the answer options. Decide which answer you believe is correct and explain why the other options might be possible but incorrect. Write your explanations in your science journal: ___________________________________ ___________________________________

Pair Start a discussion with your partner(s) by asking him/her to explain their response to the “Think” part of this sheet (above). Combine your ideas and summarize your discussion in your science journal: ___________________________________ ___________________________________

Share with the whole class the most important points from your "Paired" discussion. To prepare for sharing, list below the most important point you would like to share with the entire class in your science journal: __________________________________ __________________________________

Practice Problems SC. 7. P. 10. 1 Illustrate that the sun ’s energy arrives as radiation with a wide range of wavelengths, including infrared, visible, and ultraviolet, and that white light is made up of a spectrum of many different colors.

Felipe was enjoying the sunny day at the beach. He told his friend Carl that he was really enjoying the warm feeling that he was getting as he sat in the Sun. Carl explained that the electromagnetic radiation was responsible for this warm feeling. Which part of the electromagnetic spectrum was responsible for making Felipe feel warm? A. gamma rays B. microwaves C. visible light D. infrared waves √heck the answer

ANS: D A. is incorrect because gamma rays can penetrate most objects very easily and are not absorbed by the skin. B. is incorrect because the skin does not absorb microwaves. C. is incorrect because the skin reflects visible light. D. is correct because the skin can absorb infrared waves, which makes the skin feel warmer.

The graphs below show the wavelengths of four types of electromagnetic waves. Which graph most likely illustrates radio waves? A. A B. B C. C D. D √heck the answer

ANS: A A. is correct because Graph A shows waves with the longest wavelength, which is a characteristic of radio waves. B. is incorrect because Graph B shows waves that are shorter than Graph A. Radio waves have the longest wavelength. C. is incorrect because Graph C shows the shortest wavelengths whereas radio waves have the longest wavelength. D. is incorrect because Graph D shows the same wavelength as Graph B. Neither wavelength is the longest, which is the case for radio waves.

Both radio and television signals are carried by radio waves. What other type of electromagnetic radiation is used to send information over long distances? A. X-rays B. microwaves C. gamma rays D. ultraviolet light √heck the answer

ANS: B A. is incorrect because X-rays are used to produce internal images of the body. B. is correct because cell phones use microwaves to send signals. C. is incorrect because gamma rays are used to treat some forms of cancer. D. is incorrect because ultraviolet light is used to kill germs on surgical instruments.

These graphs show two different types of electromagnetic radiation. If Graph I shows ultraviolet radiation, what type of electromagnetic radiation would Graph II show? A. infrared light B. microwaves C. violet light D. X-rays √heck the answer

ANS: D A. is incorrect because the wavelengths of infrared light are longer than those of ultraviolet light. B. is incorrect because microwaves have a longer wavelength than ultraviolet radiation. C. is incorrect because ultraviolet light has shorter wavelength than violet light. D. is correct because X-rays have shorter wavelengths than ultraviolet light.

All electromagnetic waves travel at the same speed in a vacuum. However, different kinds of electromagnetic waves have different wavelengths. For example, microwaves have longer wavelengths than visible light. How is it possible for both microwaves and visible light to travel at the same speed in a vacuum if they have different wavelengths? A. Microwaves and visible light have the same energy. B. Microwaves and visible light have different frequencies C. The waves of visible light have less energy than microwaves D. The distance between a point on one wave to the identical point on the next wave is the same for both microwaves and visible light √heck the answer

ANS: B A. is incorrect because microwaves have less energy as a result of their longer wavelength. B. is correct because the speed of a wave is found by multiplying its wavelength by its frequency. C. is incorrect because visible light has more energy than microwaves. D. is incorrect because the microwaves and visible light are not the same wavelength.

As you work through the Tour the Electromagnetic Spectrum interactive activity, discuss the various regions of the spectrum and common objects that utilize radiation at each frequency/wavelength. .

Practice Problems SC. 7. P. 10. 3 Recognize that light waves, sound waves, and other waves move at different speeds in different materials.

Waves can pass through a solid, liquid, or a gas. What is the name for any substance through which a wave can pass? A. a crest B. a trough C. a medium D. a frequency √heck the answer

ANS: C A. is incorrect because a crest is the highest point of certain types of waves. B. is incorrect because a trough is the lowest point between each crest. C. is correct because a medium is any substance through which a wave can travel. D. is incorrect because frequency refers to the number of waves generated in a given amount of time.

The pitch of a sound wave depends on its frequency. A high frequency results in a high pitch, while a low frequency results in a low pitch. The diagram below shows the frequency of a sound wave. How should this diagram be changed to show that the wave has a higher pitch? A. Eliminate half the dots in the diagram. B. Move the areas labeled N and M closer to each other. C. Make the entire diagram look like the areas labeled N and M. D. Move the areas labeled N and M farther apart from each other. √heck the answer

ANS: B A. is incorrect because reducing the number of dots would not indicate a change in frequency. B. is correct because moving them closer together would illustrate a higher frequency and therefore a higher pitch. C. is incorrect because this would indicate a lower frequency and therefore a lower pitch. D. is incorrect because the frequency would be shown as having decreased, resulting in a lower pitch.

In 1947, pilot Chuck Yeager became the first person in an airplane to fly faster than the speed of sound. He flew his plane about 12, 000 meters above sea level. At that altitude, the speed of sound travels at 290 meters/second. At sea level, the speed of sound is about 340 meters/second. What conclusion can you make from this information? A. The speed of sound does not depend on altitude. B. The speed of sound depends on the type of plane flown. C. As the altitude increases, the speed of sound increases. D. As the altitude increases, the speed of sound decreases. √heck the answer

ANS: D A. is incorrect because the passage states that sound waves travel at different speeds, depending on altitude. B. is incorrect because the speed at which sound travels depends on the medium through which it travels. C. is incorrect because the passage states that sound travels faster at sea level. D. is correct because the passage states that the speed of sound at sea level is faster than at 12, 000 meters above sea level.

The speed of a sound wave through a substance depends on the vibrations caused by collisions of the particles that make up that substance. The more collisions there are, the faster the sound wave travels. The particles in a liquid are more closely packed together than the particles in a gas. What would you predict to happen to a sound wave as it travels from a liquid into a gas? A. The speed of the sound wave would increase. B. The speed of the sound wave would decrease. C. The amplitude of the sound wave would increase. D. The amplitude of the sound wave would decrease. √heck the answer

ANS: B A. is incorrect because fewer particles in a given volume of gas will result in fewer collisions and therefore a slower speed. B. is correct because there will be fewer collisions between particles in a gas, resulting in a decreased speed. C. is incorrect because the speed and not the amplitude of the sound wave is affected. D. is incorrect because the speed will change as the sound wave moves into a different medium.

Kalinda hates the sound of her alarm clock in the morning. What would be the best way for Kalinda not to hear the sound even if the alarm clock is ringing? A. Put the alarm clock in a jar, and put it in her closet. B. Put the alarm clock in a jar, fill it with cotton, and seal it. C. Put the alarm clock in a jar, remove all the air from it, and seal it. D. Put the alarm clock in a sealed jar and cover it with a hand towel. √heck the answer

ANS: C A. is incorrect because although the alarm might sound muffled, the sound will still travel through the jar and the door of the closet. B. is incorrect because the alarm could still travel through the cotton and jar. C. is correct because sound waves cannot travel through a vacuum. D. is incorrect because sound waves can still travel through the jar and towel.

In this interactive activity, learn about waves and explore how a wave moves through different mediums with a tool that allows you to adjust the density of the material and manipulate the direction of a wave disturbance. Also, investigate why a boat on the ocean bobs up and down and is not carried to shore by the water waves. Click on the title bar to get started.

Observe an Animation of Wave Motion When wave energy passes through water, the water moves in a circular motion. Energy is passing from left to right in this animation, but the water itself stays in the same general location.