Answer the following question given this paragraph: An electric transformer is a device that uses electromagnetic induction to change the voltage of electric current. Electromagnetic induction is the process of generating current with a magnetic field. It occurs when a magnetic field and electric conductor, such as a coil of wire, move relative to one another. A transformer may either increase or decrease voltage. You can see the basic components of an electric transformer in the Figure below . For an animation showing how a transformer works, go to this URL: http://www. youtube. com/watch?v=VucsoEhB0NA . Q: What type of device uses electromagnetic induction to change the voltage of electric current? Choices: - radioactive transformer - hot transformer - mechanical transformer - electronic transformer A:
electronic transformer
Answer the following question given this paragraph: The earth is attracted to the sun by the force of gravity. Why doesn't the earth fall into the sun?. Q: What attracts the earth to the sun? Choices: - weight - light - the moon - gravity A:
gravity
Q: Answer the following question given this paragraph: A spectrometer produces a spectrum from starlight. Astronomers can learn a lot about a star by studying its spectrum. Q: What is a spectrometer able to produce from starlight? Choices: - radio waves - exposure - aspect - spectrum A:
A: spectrum
Question: Answer the following question given this paragraph: A: Children who don't get enough calcium while their bones are forming may develop a deficiency disease called rickets, in which their bones are softer than normal and become bent and stunted. Adults who don't get enough calcium may develop a condition called osteoporosis, in which the bones lose calcium and become weak and brittle. People with osteoporosis are at high risk of bone fractures. Q: Which disease afflicts children who don't get enough calcium during their bone formation stage? Choices: - sids - rabies - cancer - rickets A:
Answer: rickets
*Question*
Answer the following question given this paragraph: Another example is carbon dioxide. This gas is produced from a variety of reactions, often by the burning of materials. The structure of the gas consists of one atom of carbon and two atoms of oxygen. Carbon dioxide production is of interest in many areas, from the amount we breather out to the amount of the gas produced by burning wood or fossil fuels. By knowing the exact composition of carbon dioxide, we can make predictions as to the effects of different chemical processes. Q: The structure of the gas carbon dioxide consists of one atom of carbon and two atoms of what? Choices: - sulfur - methane - Helium - oxygen A:
**Answer**
oxygen
(Q).
Answer the following question given this paragraph: Polluted water can form a frothy green scum on the surface. This "pond scum" is actually a living organism, algae. The algae are plant-like protists. Usually the algae are too small to notice, but sometimes algae grow in excess because of the excess nutrients in polluted water. Q: What organism constitutes frothy green "pond scum"? Choices: - bacteria - sponges - protozoa - algae A:
(A).
algae