Answer the following question given this paragraph: Suspensions and colloids are two common types of mixtures whose properties are in many ways intermediate between those of true solutions and heterogeneous mixtures. Asuspension is a heterogeneous mixture of particles with diameters of about 1 m (1000 nm) that are distributed throughout a second phase. Common suspensions include paint, blood, and hot chocolate, which are solid particles in a liquid, and aerosol sprays, which are liquid particles in a gas. If the suspension is allowed to stand, the two phases will separate, which is why paints must be thoroughly stirred or shaken before use. A colloid is also a heterogeneous mixture, but the particles of a colloid are typically smaller than those of a suspension, generally in the range of 2 to about 500 nm in diameter. Colloids include fog and clouds (liquid particles in a gas), milk (solid particles in a liquid), and butter (solid particles in a solid). Other colloids are used industrially as catalysts. Unlike in a suspension, the particles in a colloid do not separate into two phases on standing. The only combination of substances that cannot produce a suspension or a colloid is a mixture of two gases because their particles are so small that they always form true solutions. The properties of suspensions, colloids, and solutions are summarized in Table 13.9 "Properties of Liquid Solutions, Colloids, and Suspensions". Q: Colloids are used industrially as what? Choices: - organisms - impurities - solutions - catalysts A:
catalysts
Answer the following question given this paragraph: Q: Synaptic connections can change over time depending on what? Choices: - weight - diet - age - activity level A:
activity level
Q: Answer the following question given this paragraph: Over 2500 years ago Aristotle proposed two laws of physics governing motion. One for 'Earthly bodies' (objects on Earth) that states objects naturally go in straight lines and one for 'Heavenly bodies' (objects in space) that states objects naturally go in circles. This idea held steady for 2,000 years until Isaac Newton, in a triumph of brilliance, declared that there is one law of physics that governs motion and he unified "earthly" bodies and "heavenly" bodies with the The Universal Law of Gravitation. Newton used the universal law of gravity to prove that the moon is accelerating towards Earth just as a body on Earth is falling towards it. The acceleration of both the moon and the object on Earth is calculated using the same formula. This theory is so well regarded that it has been used to hypothesize the existence of black holes and dark matter, later verified by observation. The search to unify the laws of physics into one theory continues today and is often referred to as the yet undiscovered Grand Unified Theory (GUT). Q: The as yet undiscovered grand unified theory is a search to unify laws of what branch of science? Choices: - genetics - chemistry - masses - physics A:
A: physics
Question: Answer the following question given this paragraph: 25.3 Gross Anatomy of the Kidney As noted previously, the structure of the kidney is divided into two principle regionsthe peripheral rim of cortex and the central medulla. The two kidneys receive about 25 percent of cardiac output. They are protected in the retroperitoneal space by the renal fat pad and overlying ribs and muscle. Ureters, blood vessels, lymph vessels, and nerves enter and leave at the renal hilum. The renal arteries arise directly from the aorta, and the renal veins drain directly into the inferior vena cava. Kidney function is derived from the actions of about 1.3 million nephrons per kidney; these are the "functional units. " A capillary bed, the glomerulus, filters blood and the filtrate is captured by Bowman's capsule. A portal system is formed when the blood flows through a second capillary bed surrounding the proximal and distal convoluted tubules and the loop of Henle. Most water and solutes are recovered by this second capillary bed. This filtrate is processed and finally gathered by collecting ducts that drain into the minor calyces, which merge to form major calyces; the filtrate then proceeds to the renal pelvis and finally the ureters. Q: What paired organs together receive about 25 percent of cardiac output and are protected in the retroperitoneal space by the renal fat pad and overlying ribs and muscle? Choices: - hands - lungs - brain - kidneys A:
Answer: kidneys
*Question*
Answer the following question given this paragraph: Q: Name what nutrient cycling is strongly regulated by. Choices: - elevation - abundance - sunlight - vegetation A:
**Answer**
vegetation
*Question*
Answer the following question given this paragraph: Seawater has lots of salts in it. This increases its density (mass per volume) over fresh water. Temperature and pressure also affect density. Q: Salt in seawater causes it to have greater what, which is also affected by temperature and pressure? Choices: - mass - volume - area - density A:
**Answer**
density