Answer the following question given this paragraph: Top: Flickr:LearningLark; Bottom: Laura Guerin (CK-12 Foundation). Amylase and pepsin are used in our digestive system . Top: CC BY 2.0; Bottom: CC BY-NC 3.0. Q: What system of the body uses amylase and pepsin in its functioning? Choices: - respiratory system - circulatory system - hormonal system - digestive system A:
digestive system

Answer the following question given this paragraph: Planting rows of trees around fields is another way to reduce wind erosion. The trees slow down the wind, so it doesn't cause as much erosion. Fences like the one in Figure below serve the same purpose. The fence in the figure is preventing erosion and migration of sand dunes on a beach. Q: Planting a row of trees around a field or erecting a fence on a sand dune helps prevent what form of erosion? Choices: - fire - water - rain - wind A:
wind

Answer the following question given this paragraph: Magnetic Moments of Molecules and Ions Experimental evidence of magnetic measurements supports the theory of high- and low-spin complexes. Remember that molecules such as O2 that contain unpaired electrons are paramagnetic. Paramagnetic substances are attracted to magnetic fields. Many transition metal complexes have unpaired electrons and hence are paramagnetic. Molecules such as N2 and ions such as Na+ and [Fe(CN)6]4 that contain no unpaired electrons are diamagnetic. Diamagnetic substances have a slight tendency to be repelled by magnetic fields. When an electron in an atom or ion is unpaired, the magnetic moment due to its spin makes the entire atom or ion paramagnetic. The size of the magnetic moment of a system containing unpaired electrons is related directly to the number of such electrons: the greater the number of unpaired electrons, the larger the magnetic moment. Therefore, the observed magnetic moment is used to determine the number of unpaired electrons present. The measured magnetic moment of low-spin d6 [Fe(CN)6]4 confirms that iron is diamagnetic, whereas high-spin d6 [Fe(H2O)6]2+ has four unpaired electrons with a magnetic moment that confirms this arrangement. Q: As the number of unpaired electrons increases, what happens to the magnetic moment? Choices: - is destroyed - remains the same - gets smaller - gets larger A:
gets larger

Answer the following question given this paragraph: The Celsius scale is the standard SI temperature scale. It is equal to the Kelvin scale if you minus 273 from the Celsius reading. Water has a boiling point of and a freezing point of . Q: What temperature scale is obtained by adding 273 degrees from the corresponding celsius temperature? Choices: - whittle scale - seismic scale - ph scale - kelvin scale A:
kelvin scale