Answer the following question given this paragraph: When water freezes in a non-crystalline, amorphous form as frost, the water molecules are fixed in place, but not in a regular, repeating pattern. Frost and other amorphous solids are characterized by their unorganized and unpredictable structure. Because ice comes in both amorphous and crystalline forms, there are differences in the physical properties of ice such as its hardness and density. Q: What kind of solid is characterized by an unorganized and unpredictable structure? Choices: - magnetic - aqueous - porous - amorphous A:
amorphous
(Question)
Answer the following question given this paragraph: Cardiac muscle also contracts and gets shorter. This muscle is found only in the heart. The sudden burst of contraction forces blood throughout your body. When the cardiac muscle relaxes, the heart fills with blood. This rhythmic contraction must continue for your whole life, luckily the heart muscle never gets tired. If your heart beats 75 times a minute, how many times does it beat in an hour? A day? A year? 85 years?. Q: Cardiac muscle is only found where? Choices: - lung - brain - abdomen - heart A:
(Answer)
heart
Ques: Answer the following question given this paragraph: This super fast train can obviously reach great speeds. And there's a lot of technology that helps this train go fast. Speaking of helping things go fast brings us to enzymes. Life could not exist without enzymes. Essentially, enzymes are biological catalysts that speed up biochemical reactions. Q: What are biological catalysts that speeds up biochemical reactions? Choices: - carbohydrates - hormones - proteins - enzymes A:
Ans: enzymes
(Q).
Answer the following question given this paragraph: of pivot point, and so we choose the pivot point to simplify the solution of the problem. Second, the acceleration due to gravity canceled in this problem, and we were left with a ratio of masses. This will not always be the case. Always enter the correct forcesdo not jump ahead to enter some ratio of masses. Third, the weight of each child is distributed over an area of the seesaw, yet we treated the weights as if each force were exerted at a single point. This is not an approximationthe distances r 1 and r 2 are the distances to points directly below the center of gravity of each child. As we shall see in the next section, the mass and weight of a system can act as if they are located at a single point. Finally, note that the concept of torque has an importance beyond static equilibrium. Torque plays the same role in rotational motion that force plays in linear motion. We will examine this in the next chapter. Take-Home Experiment Take a piece of modeling clay and put it on a table, then mash a cylinder down into it so that a ruler can balance on the round side of the cylinder while everything remains still. Put a penny 8 cm away from the pivot. Where would you need to put two pennies to balance? Three pennies?. Q: What plays the same role in rotational motion that force plays in linear motion. Choices: - efficiency - frame - fulcrum - torque A:
(A).
torque
Ques:Answer the following question given this paragraph: Scientists also collect rock and sediment samples from the seafloor. A dredge is a giant rectangular bucket that is dragged along behind a ship. The dredge picks up loose rocks lying on the seafloor. Gravity corers are metal tubes that fall to the seafloor. They slice into the sediments to collect a sample. The research vessel, the Joides Resolution , drills deep into the seafloor to collect samples of the sediment and ocean crust. Scientists analyze the samples for chemistry and their magnetic properties. Q: Behind a ship, what is the giant rectangular bucket that is dragged along from the behind called? Choices: - prop - trousers - wig - dredge A:

Ans:dredge
Ques:Answer the following question given this paragraph: Research is being done into alternative crops for biofuels. A very promising alternative is algae. Algae appears to be a better biofuel than corn. Algae is much easier to convert to a usable fuel. Growing algae requires much less land and energy than crops. Algae can be grown in locations that are not used for other things. For example, they can be grown in desert areas where food crops are not often grown. Corn must be grown where food crops are grown. This can reduce the land and water available for growing food. Algae can be fed agricultural and other waste, so valuable resources are not used. Much research is being done to bring these alternative fuels to market. Q: What is algae easier to covert into that corn is currently used for? Choices: - oil - food - sugar - fuel A:

Ans:
fuel