Answer the following question given this paragraph: The sum of the calculated atomic radii of sodium and chlorine atoms is 253 pm. The sodium cation is significantly smaller than a neutral sodium atom (102 versus 154 pm), due to the loss of the single electron in the 3s orbital. Conversely, the chloride ion is much larger than a neutral chlorine atom (181 versus 99 pm), because the added electron results in greatly increased electronelectron repulsions within the filled n = 3 principal shell. Thus, transferring an electron from sodium to chlorine decreases the radius of sodium by about 50%, but causes the radius of chlorine to almost double. The net effect is that the distance between a sodium ion and a chloride ion in NaCl is greaterthan the sum of the atomic radii of the neutral atoms. Q: Transferring what from sodium to chlorine decreases the radius of sodium by about 50%? Choices: - quark - proton - neutron - electron A:
electron
Answer the following question given this paragraph: Connective Tissue Fibers and Ground Substance Three main types of fibers are secreted by fibroblasts: collagen fibers, elastic fibers, and reticular fibers. Collagen fiber is made from fibrous protein subunits linked together to form a long and straight fiber. Collagen fibers, while flexible, have great tensile strength, resist stretching, and give ligaments and tendons their characteristic resilience and strength. These fibers hold connective tissues together, even during the movement of the body. Elastic fiber contains the protein elastin along with lesser amounts of other proteins and glycoproteins. The main property of elastin is that after being stretched or compressed, it will return to its original shape. Elastic fibers are prominent in elastic tissues found in skin and the elastic ligaments of the vertebral column. Reticular fiber is also formed from the same protein subunits as collagen fibers; however, these fibers remain narrow and are arrayed in a branching network. They are found throughout the body, but are most abundant in the reticular tissue of soft organs, such as liver and spleen, where they anchor and provide structural support to the parenchyma (the functional cells, blood vessels, and nerves of the organ). All of these fiber types are embedded in ground substance. Secreted by fibroblasts, ground substance is made of polysaccharides, specifically hyaluronic acid, and proteins. These combine to form a proteoglycan with a protein core and. Q: Collagen fibers, elastic fibers, and reticular fibers comprise what type of tissue? Choices: - nucleus tissue - intestine tissue - skin tissue - connective tissue A:
connective tissue
Q: Answer the following question given this paragraph: Electromagnetic waves may also be absorbed by matter and converted to other forms of energy. Microwaves are a familiar example. When microwaves strike food in a microwave oven, they are absorbed and converted to thermal energy, which heats the food. Q: Microwaves are converted into what kind of energy in a microwave oven? Choices: - solar energy - mechanical energy - light energy - thermal energy A:
A: thermal energy
Question: Answer the following question given this paragraph: Thick fur and a layer of blubber keep polar bears warm in their Arctic ecosystem. Why do you think their fur is white? Why might it be an adaptation in an Arctic biome?. Q: What 2 things keep polar bears warm in their arctic ecosystem? Choices: - hibernation, thick fur - colourful fur , blubber - camouflage, blubber - thick fur, blubber A:
Answer: thick fur, blubber
*Question*
Answer the following question given this paragraph: Air pollution consists of chemical substances and particles released into the air, mainly by human actions. The major cause of outdoor air pollution is the burning of fossil fuels. Indoor air can also be polluted. Air pollution, in turn, causes acid rain, ozone depletion, and global warming. Q: What causes acid rain, ozone depletion, and global warming? Choices: - ozone layer - water pollution - radiation - air pollution A:
**Answer**
air pollution
(Question)
Answer the following question given this paragraph: Another amazing feature on the Sun is solar prominences. Plasma flows along the loop that connects sunspots. This plasma forms a glowing arch. The arch is a solar prominence. Solar prominences can reach thousands of kilometers into the Sun's atmosphere. Prominences can last for a day to several months. Prominences can be seen during a total solar eclipse. Q: What is the arch called that forms when plasma of the sun flows along the loop that connects sunspots? Choices: - Energy prominence. - vertical prominence - large prominence - solar prominence A:
(Answer)
solar prominence