Answer the following question given this paragraph: Convection is the transfer of heat by a current. Convection happens in a liquid or a gas. Air near the ground is warmed by heat radiating from Earth's surface. The warm air is less dense, so it rises. As it rises, it cools. The cool air is dense, so it sinks to the surface. This creates a convection current, like the one in Figure below . Convection is the most important way that heat travels in the atmosphere. Q: What is the transfer of heat by a current? Choices: - radiation - combustion - diffusion - convection A:
convection
(Question)
Answer the following question given this paragraph: Just as the burning of wood releases energy in the form of heat, many other chemical reactions also release heat. There are also chemical reactions, such as photosynthesis in plants, which absorb energy in the form of heat. The study of energy changes in chemical reactions is called thermochemistry . The broader term thermodynamics also looks at how heat, work, and various forms of energy are related to one another. In this lesson, we will study the difference between reactions that absorb versus release heat as well as how to measure this change in energy. Q: What branch of physical science looks at how heat, work, and various forms of energy are related to one another? Choices: - photosynthesis - frigidity - transformations - thermodynamics A:
(Answer)
thermodynamics
Ques: Answer the following question given this paragraph: Biochemical reactions are optimal at physiological temperatures. For example, most biochemical reactions work best at the normal body temperature of 98.6F (37C). Many enzymes lose function at lower and higher temperatures. At higher temperatures, an enzyme's shape deteriorates, and only when the temperature comes back to normal does the enzyme regain its shape and normal activity. Q: Biochemical reactions are optimal at physiological temperatures because many what lose function at lower and higher temperatures? Choices: - hormones - carbohydrates - neurons - enzymes A:
Ans: enzymes
(Q).
Answer the following question given this paragraph: Q: The development of specific structures in specific locations is called what? Choices: - speciation - specialty skills - adaptation - pattern formation A:
(A).
pattern formation
Ques:Answer the following question given this paragraph: When using measuring devices, we often use a technique called calibration to increase the accuracy of our measurements. Calibration is a method of setting or correcting a measuring device by matching it to known measurement standards. To better understand calibration, we will look at the example of calibrating a thermometer. All thermometers are slightly different in their temperature readings. One way to calibrate a thermometer is by using the freezing point and boiling point of water ( Figure below ). If we know that water freezes at 0C and boils at 100C, we can calibrate our thermometer by measuring the temperature of ice water and of boiling water. We place the thermometer in ice water and wait for the thermometer liquid to reach a stable height, then place a mark at this height which represents 0C. Then we place the thermometer in boiling water, and after waiting for the thermometer liquid to reach a stable height, we place a mark at this height which represents 100C. We can then place 100 equally spaced divisions between our 0 and 100C marks to each represent 1C. Our thermometer has now been calibrated using the known values for the freezing point and boiling point of water, and can be used to measure temperatures of objects between 0 and 100C. Q: What is the method of setting or correcting a measuring device by matching it to known measurement standards called? Choices: - parallax - distortion - precision - calibration A:

Ans:calibration
Ques:Answer the following question given this paragraph: Metju12. Cold sores are caused by a herpes virus . Public Domain. Q: Name the virus that causes cold sores. Choices: - Epstein-Barr - eboli - AIDS - herpes virus A:

Ans:
herpes virus