Answer the following question given this paragraph: Ulcers are sores in the lining of the stomach or duodenum that are usually caused by bacterial infections. They may also be caused by the acidic environment of the stomach. Stomach acids may damage the lining of the stomach. Symptoms typically include abdominal pain and bleeding. You can see how stomach ulcers develop at this link: http://www. youtube. com/watch?v=4bXZRgJ-1fk . Q: What are sores in the lining of the stomach or duodenum that are usually caused by bacterial infections or acidity? Choices: - lesions - clots - hernia - ulcers A:
ulcers
Answer the following question given this paragraph: How metalloids behave in chemical interactions with other elements depends mainly on the number of electrons in the outer energy level of their atoms. Metalloids may act either like metals or nonmetals in chemical reactions. Q: In chemical reactions, what substances can act like metals or nonmetals, depending on their number of electrons? Choices: - diacritics - minerals - synthetics - metalloids A:
metalloids
Q: Answer the following question given this paragraph: Q: Liquid water changing to water vapor is called? Choices: - oxidation - respiration - transpiration - evaporation A:
A: evaporation
Question: Answer the following question given this paragraph: Solubility is the amount of solute that can dissolve in a given amount of solvent at a given temperature. In a solution, the solute is the substance that dissolves, and the solvent is the substance that does the dissolving. For a given solvent, some solutes have greater solubility than others. For example, sugar is much more soluble in water than is salt. But even sugar has an upper limit on how much can dissolve. In a half liter of 20 C water, the maximum amount is 1000 grams. If you add more sugar than this, the extra sugar won't dissolve. You can compare the solubility of sugar, salt, and some other solutes in the Table below . For a video about solubility, go to this URL: http://www. youtube. com/watch?v=IKimraU21ws . Q: What is the amount of solute that can dissolve in a given amount of solvent at a given temperature? Choices: - permeability - humidity - viscosity - solubility A:
Answer: solubility
*Question*
Answer the following question given this paragraph: More recently, people have learned to process biomass to make fuel. This is called biofuel . Biofuel is created from crops, such as corn or algae. Biofuel is unique among renewable energy sources. This is because it is liquid. Unlike solar energy, for example, biofuels can be used in a car ( Figure below ). Biofuels burn more cleanly than fossil fuels. They create less pollution and less carbon dioxide. Biofuels, such as ethanol, are added to gasoline. This cuts down the amount of fossil fuels that are used. Q: What is biomass made into fuel called? Choices: - benign fuel - toxic fuel - renewable fuel - bio fuel A:
**Answer**
bio fuel
(Q).
Answer the following question given this paragraph: Algae is sometimes mocked as a source of fuel. But algae are a potentially wonderful source of power. They convert energy from the Sun into food by photosynthesis. Algae can be grown in desert areas where other crops cannot grow. Nutrients for algae may be wastes from other processes. Algae can be processed to be made into a liquid. There is a lot of research going on to harness algae for biofuels. Q: Algae convert energy from the sun into food by means of what process? Choices: - luminosynthesis - compression - glycolysis - photosynthesis A:
(A).
photosynthesis