Answer the following question given this paragraph: Some of the largest, and most beautiful, natural crystals can be found in the Naica mine, in Mexico. These gypsum crystals were formed over thousands of years. Groundwater that is rich in calcium and sulfur flowed through an underground cave. Check it out:. Q: In what country can some of the largest natural crystals be found? Choices: - spain - germany - canada - mexico A:
mexico
Answer the following question given this paragraph: The lungs of mammals are unique in having alveoli . These are tiny, sac-like structures. Each alveolus is surrounded by a network of very small blood vessels (see Figure below ). Because there are millions of alveoli in each lung, they greatly increase the surface area for gas exchange between the lungs and bloodstream. Human lungs, for example, contain about 300 million alveoli. They give the lungs a total surface area for gas exchange of up to 90 square meters (968 square feet). That's about as much surface area as one side of a volleyball court!. Q: The lungs of mammals are unique in having what? Choices: - alveolar - glands - acini - alveoli A:
alveoli
Q: Answer the following question given this paragraph: The average kinetic energy of the molecules is proportional to the temperature of the sample. Q: The kinetic energy of molecules is generally proportionate to what other property that they have? Choices: - variation - mass - precipitation - temperature A:
A: temperature
Question: Answer the following question given this paragraph: Eukaryotic cell division involves mitosis and cytokinesis. Q: Eukaryotic cell division involves mitosis and what? Choices: - meiosis - electrolysis - spermatogenesis - cytokinesis A:
Answer: cytokinesis
*Question*
Answer the following question given this paragraph: The stomach is a sac-like organ in which food is further digested both mechanically and chemically. (To see an animation of how the stomach digests food, go to the link below. ) Churning movements of the stomach's thick, muscular walls complete the mechanical breakdown of food. The churning movements also mix food with digestive fluids secreted by the stomach. One of these fluids is hydrochloric acid. It kills bacteria in food and gives the stomach the low (acidic) pH needed by digestive enzymes that work in the stomach. The main enzyme is pepsin , which chemically digests protein. Q: What is the sac-like organ of the body that is important for both mechanical and chemical digestion? Choices: - gall bladder - kidney - spleen - stomach A:
**Answer**
stomach
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Answer the following question given this paragraph: Q: What is liquid water falling from the sky called? Choices: - snow - clouds - evaporation - rain A:
**Answer**
rain