(Q).
Answer the following question given this paragraph: Many kinds of waves exist, such as sound waves and water waves. Visible light is also a wave. It is a specific type of a more general phenomenon called an electromagnetic wave. All waves can be described in terms of the basic physical properties frequency and wavelength . These two properties are related to the speed of a wave by the following equation:. Q: What type of wave is visible light? Choices: - static - radio - acoustic - electromagnetic A:
(A).
electromagnetic

(Q).
Answer the following question given this paragraph: The measure of how quickly a nucleus decays is given by the half-life of the nucleus. One half-life is the amount of time it will take for half of the radioactive material to decay. Q: What do we call the amount of time it will take for half of the radioactive material to decay? Choices: - one partial-life - one full-life - one quarter-life - one half-life A:
(A).
one half-life

(Q).
Answer the following question given this paragraph: The process in which a solid changes directly to a gas is called sublimation . It occurs when the particles of a solid absorb enough energy to completely overcome the force of attraction between them. Dry ice (solid carbon dioxide, CO 2 ) is an example of a solid that undergoes sublimation. Figure below shows a chunk of dry ice changing directly to carbon dioxide gas. Sometimes snow undergoes sublimation as well. This is most likely to occur on sunny winter days when the air is very dry. What gas does snow become?. Q: What is the process in which a solid changes directly to a gas called? Choices: - condensation - solidification - vaporization - sublimation A:
(A).
sublimation