Q: Explanations of some aspect of the natural world based on repeated observations are termed what? Read this paragraph and choose the correct option from the provided answers: Scientific theories are explanations of some aspect of the natural world based on repeated observations. Choices: - scientific insights - scientific thoughts - scientific guesses - scientific theories A:
scientific theories

(Question)
Q: What organ system consists of the skin, nails and hair? Read this paragraph and choose the correct option from the provided answers: The skin is the major organ of the integumentary system , which also includes the nails and hair. In fact, the skin is the body's largest organ, and a remarkable one at that. Consider these skin facts. The average square inch (6.5 cm 2 ) of skin has 20 blood vessels, 650 sweat glands, and more than a thousand nerve endings. It also has an incredible 60,000 pigment-producing cells. All of these structures are packed into a stack of cells that is just 2 mm thick, or about as thick as the cover of a book. Choices: - nervous system - digestive system - endocrine system - integumentary system A:
(Answer)
integumentary system

Ques: Q: What is the rate at which energy is being transferred called? Read this paragraph and choose the correct option from the provided answers: Power is the rate at which energy is being transferred. Power tells you how many Joules per second of energy is being used to drive something. Thus power is simply the change in energy divided by the time. Since work is by definition the transfer of energy (in or out of a system), power is also equal to the work divided by the time. Efficiency tells you how efficient something is and gives a number between 0 and 1. If the efficiency is equal to 1, then the machine is perfectly efficient (that is all the power used to drive it goes to the out put of the machine with no energy losses). If the efficiency is zero, then all of the input power is lost in the machine and the machine can not output any energy. Choices: - electric - force - pressure - power A:
Ans: power

(Q).
Q: Isobaric expansion is a process occurring without a change in what? Read this paragraph and choose the correct option from the provided answers: isobaric expansion is a process occurring without a change in pressure. Choices: - direction - temperature - energy - pressure A:
(A).
pressure

Ques:Q: What is the most widely distributed organism around? Read this paragraph and choose the correct option from the provided answers: Viruses can be found almost anywhere there is life, including living within prokaryotes. A phage is a virus that infects prokaryotes. Phages are estimated to be the most widely distributed and diverse entities in the biosphere, even more numerous than prokaryotic organisms. Phages can be found everywhere their hosts are found, such as in soil, in the intestine of animals, or seawater. Up to 10 9 virions have been found in a milliliter of seawater, and up to 70 percent of marine bacteria may be infected by phages. They are also found in drinking water and in some foods, including fermented vegetables and meats, where they control the growth of bacteria. Choices: - viruses - cockroaches - microbes - phages A:

Ans:phages

Ques: Q: What is the number placed in front of a chemical symbol or formula that shows how many atoms or molecules of the substance are involved in the reaction? Read this paragraph and choose the correct option from the provided answers: Coefficients are used to balance chemical equations. A coefficient is a number placed in front of a chemical symbol or formula. It shows how many atoms or molecules of the substance are involved in the reaction. Choices: - requirement - frequency - note - coefficient A:
Ans:
coefficient