Answer the following question given this paragraph: Ecology is the study of how living things interact with each other and with their environment. Q: What is the study of how living things interact with each other and with their environment? Choices: - scientology - biology - geology - ecology A:
ecology
Answer the following question given this paragraph: Sound waves are mechanical waves, and mechanical waves can only travel through matter. The matter through which the waves travel is called the medium (plural, media). The Table below gives the speed of sound in several different media. Generally, sound waves travel most quickly through solids, followed by liquids, and then by gases. Particles of matter are closest together in solids and farthest apart in gases. When particles are closer together, they can more quickly pass the energy of vibrations to nearby particles. You can explore the speed of sound in different media at this URL:. Q: What is the matter through which sound waves travel? Choices: - dust - mass - air - medium A:
medium
Q: Answer the following question given this paragraph: Base units have independent scales and cannot be described by a combination of any other base units. Examples of base units used in chemistry are length, mass, temperature, and time. Q: Time, mass, length, and temperature are considered to be what kinds of units? Choices: - support - measurement - unitary - base A:
A: base
Question: Answer the following question given this paragraph: Buffer Systems in the Body The buffer systems in the human body are extremely efficient, and different systems work at different rates. It takes only seconds for the chemical buffers in the blood to make adjustments to pH. The respiratory tract can adjust the blood pH upward in minutes by exhaling CO2 from the body. The renal system can also adjust blood pH through the excretion of hydrogen ions (H+) and the conservation of bicarbonate, but this process takes hours to days to have an effect. The buffer systems functioning in blood plasma include plasma proteins, phosphate, and bicarbonate and carbonic acid buffers. The kidneys help control acid-base balance by excreting hydrogen ions and generating bicarbonate that helps maintain blood plasma pH within a normal range. Protein buffer systems work predominantly inside cells. Q: The kidneys help control acid-base balance by excreting _____ and generating bicarbonate that helps maintain blood plasma ph within a normal range? Choices: - magnesium ions - sodium ions - lithium ions - hydrogen ions A:
Answer: hydrogen ions
*Question*
Answer the following question given this paragraph: Acids have some properties in common. They turn litmus, a plant extract, red. They react with some metals to give off H2 gas. They react with carbonate and hydrogen carbonate salts to give off CO2 gas. Acids that are ingested typically have a sour, sharp taste. (The name acid comes from the Latin word acidus, meaning "sour. ") Bases also have some properties in common. They are slippery to the touch, turn litmus blue, and have a bitter flavor if ingested. Acids and bases have another property: they react with each other to make water and an ionic compound called a salt. A salt, in chemistry, is any ionic compound made by combining an acid with a base. A reaction between an acid and a base is called a neutralization reaction and can be represented as follows: acid + base H2O + salt The stoichiometry of the balanced chemical equation depends on the number of H+ions in the acid and the number of OH ions in the base. Q: What type of ionic compound is formed from acid and bases reacting with each other? Choices: - isolated - common - dry - salt A:
**Answer**
salt
(Q).
Answer the following question given this paragraph: Polychaete worms live on the ocean floor. They may be sedentary filter feeders or active predators or scavengers. Active species crawl along the ocean floor in search of food. Q: Where do polychaete worms live? Choices: - lakes - digestive tract - garden soil - the ocean floor A:
(A).
the ocean floor