Answer the following question given this paragraph: The story is quite different for gases. Gases take the shape of their container, and they are relatively easy to compress. There are fewer gas particles per unit volume than for the same substance in the liquid or solid form. In fact, the liquid form of a given material is generally several hundred times more dense than the gas form at normal pressures. Despite the large amounts of empty space, a sample of a gas contains many particles moving around, colliding and imparting force on their surroundings. For example, in a one mole sample of gas at 0C and 1 atm of pressure, each cubic centimeter contains roughly 2.7 10 19 molecules. Each molecule participates in several billion collisions every second, moving only about 10-100 nanometers between collisions. Additionally, these gas particles move at very high speeds. For example, at 25C, the average speed of hydrogen molecules in a sample of hydrogen gas is 1960 m/s. Q: What take the shape of their container, and are relatively easy to compress? Choices: - molecules - semi-fluids - fluids - gases A:
gases
(Question)
Answer the following question given this paragraph: An object will not change its state of motion (i. e. , accelerate) unless a net force acts on it. Equal and oppositely directed forces do not produce acceleration. Q: Equal and oppositely directed forces produce what kind of acceleration? Choices: - steady acceleration - greater acceleration - faster acceleration - no acceleration A:
(Answer)
no acceleration
Ques: Answer the following question given this paragraph: A mirror is typically made of glass with a shiny metal backing that reflects all the light that strikes it. When a mirror reflects light, it forms an image. An image is a copy of an object that is formed by reflection or refraction. Mirrors may have flat or curved surfaces. The shape of a mirror's surface determines the type of image it forms. For example, some mirrors form real images, and other mirrors form virtual images. What's the difference between real and virtual images?. Q: What is a copy of an image formed by reflection or refraction? Choices: - an example - a photographic image - a mirror image - an image A:
Ans: an image
(Q).
Answer the following question given this paragraph: The plasma membrane may have extensions, such as whip-like flagella or brush-like cilia. In single-celled organisms, like those shown in Figure below , the membrane extensions may help the organisms move. In multicellular organisms, the extensions have other functions. For example, the cilia on human lung cells sweep foreign particles and mucus toward the mouth and nose. Q: In single-celled organisms, plasma membrane extensions, such as whip-like flagella or brush-like cilia, aid in what? Choices: - sensation - sound - pressure - movement A:
(A).
movement
Ques:Answer the following question given this paragraph: The hemisphere that is tilted away from the Sun is cooler because it receives less direct rays. As Earth orbits the Sun, the Northern Hemisphere goes from winter to spring, then summer and fall. The Southern Hemisphere does the opposite from summer to fall to winter to spring. When it is winter in the Northern hemisphere, it is summer in the Southern hemisphere, and vice versa. Q: The hemisphere that is tilted away from the sun is cooler because it receives less what? Choices: - direct electrons - x-rays - pollution - direct rays A:

Ans:direct rays
Answer the following question given this paragraph: Another common dilution problem involves deciding how much of a highly concentrated solution is requires to make a desired quantity of solution of lesser concentration. The highly concentrated solution is typically referred to as the stock solution. Q: What is a high concentrated solution typically referred to as? Choices: - percent solution - saline sollution - share solution - stock solution A:
stock solution