Answer the following question given this paragraph: Carbohydrates include sugars, starches, and fiber. Sugars and starches are used by the body for energy. One gram of carbohydrates provides 4 Calories of energy. Fiber, which is found in plant foods, cannot be digested but is needed for good health. Q: One gram of carbohydrates provides how many calories of energy? Choices: - eight - one - two - four A:
four
(Question)
Answer the following question given this paragraph: Cellular respiration and photosynthesis are direct opposite reactions. Energy from the sun enters a plant and is converted into glucose during photosynthesis. Some of the energy is used to make ATP in the mitochondria during cellular respiration, and some is lost to the environment as heat. Q: During photosynthesis, what is energy from the sun converted to after entering a plant? Choices: - Carbon - chloride - Proteins - glucose A:
(Answer)
glucose
Ques: Answer the following question given this paragraph: Feathers are also used all over the world to stuff pillows, mattresses, sleeping bags, coats, and quilting. Goose feathers are preferred because they are soft. Manufacturers often mix goose feathers with down feathers to provide extra softness. Q: Why are goose feathers preferred for stuffing by manufacturers? Choices: - multi layers build up - smoothness - thickness - softness A:
Ans: softness
(Q).
Answer the following question given this paragraph: Note that in Table 14.3, the best thermal conductorssilver, copper, gold, and aluminumare also the best electrical conductors, again related to the density of free electrons in them. Cooking utensils are typically made from good conductors. Q: The best thermal conductors are also the best conductors of what, which is also related to the density of free electrons in them? Choices: - light - pollution - sound - electricity A:
(A).
electricity
Ques:Answer the following question given this paragraph: The decay of an unstable isotope to a stable element occurs at a constant rate. This rate is different for each parent-daughter isotope pair. The decay rate is measured in a unit called the half-life. The half-life is the time it takes for half of a given amount of an isotope to decay. For example, the half-life of carbon-14 is 5,730 years. Imagine that you start out with 100 grams of carbon-14. In 5,730 years, half of it decays. This leaves 50 grams of carbon-14. Over the next 5,730 years, half of the remaining amount will decay. Now there are 25 grams of carbon-14. How many grams will there be in another 5,730 years? The figure below graphs the rate of decay of a substance ( Figure below ). Q: The rate at which an unstable isotope decays is measured in a unit known as what? Choices: - full-life - staying-life - half-time - half-life A:

Ans:half-life
Answer the following question given this paragraph: During a thunderstorm, some parts of a thunderhead become negatively charged. Other parts become positively charged. The difference in charge creates lightning. Lightning is a huge release of electricity. Lightning can jump between oppositely charged parts of the same cloud, between one cloud and another, or between a cloud and the ground. You can see lightning in Figure below . Lightning blasts the air with energy. The air heats and expands so quickly that it explodes. This creates the loud sound of thunder . Q: What causes lightning during a thunderstorm? Choices: - difference in wind - difference in elevation - difference in temperature - difference in charge A:
difference in charge