Answer the following question given this paragraph: A related process to diffusion is the effusion. Effusion is the process of a confined gas escaping through a tiny hole in its container. Effusion can be observed by the fact that a helium-filled balloon will stop floating and sink to the floor after a day or so. This is because the helium gas effuses through tiny pores in the balloon. Both diffusion and effusion are related to the speed at which various gas molecules move. Gases that have a lower molar mass effuse and diffuse at a faster rate than gases that have a higher molar mass. Q: Both diffusion and effusion are related to the speed at which what objects move? Choices: - electricity - copper molecules - solids - gas molecules A:
gas molecules
(Question)
Answer the following question given this paragraph: Many of the fibers that compose the materials for our clothes are naturally occurring. Silk and cotton are examples of natural fibers. Silk is produced by the silkworm, and cotton is grown as a plant. However, several chemical processes are used to treat silk thread so that it is shrink-resistant and will repel water. Chemical dyes are frequently used to color various fabrics. Cleaning requires special soaps or chemicals used to dry-clean materials. Cotton will grow better if the boll weevil (an insect that kills the plant) is eliminated with the use of specific insecticides. Ironing of cotton is made easier by the use of chemicals that produce a permanent press in the material. Q: Silk and cotton are examples of what type of fibers? Choices: - mechanical - artificial - coral - natural A:
(Answer)
natural
Ques: Answer the following question given this paragraph: The Noble Gases The noble gases are helium, neon, argon, krypton, xenon, and radon. Because the noble gases are composed of only single atoms, they are monatomic. At room temperature and pressure, they are unreactive gases. Because of their lack of reactivity, for many years they were called inert gases or rare gases. However, the first chemical compounds containing the noble gases were prepared in 1962. Although the noble gases are relatively minor constituents of the atmosphere, natural gas contains substantial amounts of helium. Because of its low reactivity, argon is often used as an unreactive (inert) atmosphere for welding and in light bulbs. The red light emitted by neon in a gas discharge tube is used in neon lights. Q: Noble gases are monatomic because they only contain one of what? Choices: - ions - molecules - charges - atoms A:
Ans: atoms
(Q).
Answer the following question given this paragraph: Q: Internal body fluids link exchange surfaces to what else? Choices: - ligaments - organs - tissue - body cells A:
(A).
body cells
Ques:Answer the following question given this paragraph: Centrioles are a very important part of centrosomes, which are involved in organizing microtubules in the cytoplasm. Centrosomes are associated with the nuclear membrane during prophase of the mitosis. In mitosis, the nuclear membrane breaks down and the microtubule organizing center (MTOC) of the centrosome arranges microtubules such that they interact with the chromosomes to build the mitotic spindle. Q: Centrioles are a very important part of what? Choices: - centricles - tubercles - enterocytes - centrosomes A:

Ans:centrosomes
Question: Answer the following question given this paragraph: To express the uncertainty in a measurement, we can calculate percent uncertainty . Percent uncertainty is the ratio of the uncertainty to the measured value, multiplied by one-hundred. For instance, the percent uncertainty associated with the measurement of (52.9 0.5 mL), would be. Q: What is the ratio of the uncertainty to the measured value, multiplied by one-hundred called? Choices: - variable uncertainty - amount uncertainty - percent inconsistency - percent uncertainty A:
Answer:
percent uncertainty