Answer the following question given this paragraph: The energy of sound waves spreads out over a greater area as the waves travel farther from the sound source. This diagram represents just a small section of the total area of sound waves spreading out from the source. Sound waves actually travel away from the source in all directions. As distance from the source increases, the area covered by the sound waves increases, lessening their intensity. Q: As distance from the source increases, the area covered by the sound waves increases, lessening what? Choices: - velocity - density - duration - intensity A:
intensity
(Question)
Answer the following question given this paragraph: The sporophyte produces haploid spores. The rhizoid buds to form a mature gametophyte. The zygote is housed in the venter. Figure 25.21 Which of the following statements about the fern life cycle is false? a. Sporangia produce haploid spores. The sporophyte grows from a gametophyte. The sporophyte is diploid and the gametophyte is haploid. Sporangia form on the underside of the gametophyte. Q: In some plants, the sporophyte is diploid, while the gametophyte is what? Choices: - gametes - humanoid - meiosis - haploid A:
(Answer)
haploid
Ques: Answer the following question given this paragraph: The speed of sound also depends on the temperature of the medium. For a given medium such as air, sound has a slower speed at lower temperatures. You can compare the speed of sound in air at different temperatures in Table below . A lower temperature means that particles of the medium are moving more slowly, so it takes them longer to transfer the energy of the sound waves. The amount of water vapor in the air affects the speed of sound as well. Do you think sound travels faster or slower when the air contains more water vapor? ( Hint: Compare the speed of sound in water and air in Table above . ). Q: The amount of water vapor in the air and the temperature of the medium affects how fast what travels? Choices: - colour - light - traffic - sound A:
Ans: sound
(Q).
Answer the following question given this paragraph: Transition metals include the elements that are placed below the periodic table. Those that follow lanthanum (La) are called lanthanides. They are all shiny, relatively reactive metals. Those that follow Actinium (Ac) are called actinides. They are all radioactive metals. This means they are unstable. They break down into different, more stable elements. You can read more about radioactive elements in the chapter Nuclear Chemistry . Many of the actinides do not occur in nature but are made in laboratories. Q: What do you call the metal elements listed below the periodic table? Choices: - rare metals - shift metals - process metals - transition metals A:
(A).
transition metals
Ques:Answer the following question given this paragraph: Waves may reflect off an obstacle that they are unable to pass through. When waves are reflected straight back from an obstacle, the reflected waves interfere with the original waves and create standing waves . These are waves that appear to be standing still. Standing waves occur because of a combination of constructive and destructive interference. You can see animations of standing waves at the URLs below. Q: What do waves do when they are unable to pass through an object? Choices: - produce off - Roll over. - develop off - reflect off A:

Ans:reflect off
Ques:Answer the following question given this paragraph: The earliest fungi may have evolved about 600 million years ago. Q: How many years ago may the earliest fungi have evolved? Choices: - .350 million - 500 million - .250 million - 600 million A:

Ans:
600 million