Answer the following question given this paragraph: A: If calcium chloride dissolves in water, it breaks down into its ions (Ca 2+ and Cl - ). When water has ions dissolved in it, it has a lower freezing point. Pure water freezes at 0C. With calcium and chloride ions dissolved in it, it won't freeze unless the temperature reaches -29C or lower. Q: In celsius, what is the temperature at which water freezes? Choices: - 32 degrees - 100 degrees - absolute zero - zero degrees A:
zero degrees
Answer the following question given this paragraph: Birds have air sacs that store inhaled air and push it into the lungs like bellows. This keeps the lungs constantly filled with oxygenated air. The lungs also contain millions of tiny passages that create a very large surface area for gas exchange with the blood (see Figure below ). Q: Birds have air sacs that store inhaled air and push it into their what? Choices: - beaks - bones - abdomens - lungs A:
lungs
Q: Answer the following question given this paragraph: The formation of scientific theories is generally guided by the law of parsimony. According to this law, the simplest of competing theories is most likely to be correct. Q: Which law means that the simplest of competing theories is most likely to be correct? Choices: - Newton's law - Law of Conservation - Murphy's Law - law of parsimony A:
A: law of parsimony
Question: Answer the following question given this paragraph: Not getting enough vitamins can cause health problems. For example, too little vitamin C causes a disease called scurvy. People with scurvy have bleeding gums, nosebleeds, and other symptoms. Q: What disease, caused by vitamin c deficiency, causes bleeding gums, nosebleeds, and other symptoms? Choices: - rickets - dehydration - leukemia - scurvy A:
Answer: scurvy
*Question*
Answer the following question given this paragraph: Kinetic friction acts between two surfaces that are in contact and in motion with respect to each other. This force reduces the acceleration and it always opposes the direction of motion. Q: What type of force always opposes the direction of motion? Choices: - binary friction - strong force - harmonic friction - kinetic friction A:
**Answer**
kinetic friction
Q: Answer the following question given this paragraph: Many species have a feeding structure, the radula , found only in mollusks. The radula can be thought of as a "tongue-like" structure. The radula is made mostly of chitin. Types of radulae range from structures used to scrape algae off of rocks to the beaks of squid and octopuses. Q: What is the radula made mostly of? Choices: - casein - chlorophyll - schist - chitin A:
A: chitin