(Question)
Answer the following question given this paragraph: Q: In earthworms, the skin serves as what type of organ? Choices: - kidney - reproductive - excretory - respiratory A:
(Answer)
respiratory

(Question)
Answer the following question given this paragraph: Many chemicals that we use on a daily basis are transported in a concentrated form but used in a more diluted form. For example, concentrated cleaners are often diluted before they are used. To perform a dilution , pure solvent is added to a concentrated solution in order to make a less concentrated (more dilute) solution. The resultant solution will contain the same amount of solute but a greater amount of solvent. It will therefore have a lower concentration than the original solution. When performing a simple dilution, the concentration and volume of the initial solution are related to the new concentration and volume as follows:. Q: The resultant solution will contain the same amount of solute but a greater amount of what? Choices: - calcium - liquid - pigment - solvent A:
(Answer)
solvent

(Question)
Answer the following question given this paragraph: Longitudinal waves, like sound waves, have compression and rarefaction zones. The compression zones are where, for example in a sound wave traveling through air, the air molecules are densely packed. The rarefaction zones are areas where the air molecules are loosely packed, like a vacuum zone. Us teachers will often draw longitudinal waves as transverse waves, but remember the difference. Q: What is the opposite of rarefaction zones, where air molecules in waves are loosely packed? Choices: - molecules zones - pressure wave - measurements zones - compression zones A:
(Answer)
compression zones