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math is the study of abstractions. math allows us to isolate one or a few features such as the number, shape or direction of some kind of object. then we can study what can be learned about the behavior of those features while ignoring everything else about the object.

938 questions

this category encompasses all questions about the composition, structure, properties, and reactions of matter.

285 questions

the observation, identification, description, experimental investigation, and theoretical explanation of phenomena is all part of science. nothing is immune to the scientific process: from charm quarks that haven't existed naturally since the beginning of time to pluto, recently demoted from planet to dwarf planet. questions on knowledge about the material and physical aspects of our world are asked and answered here.

207 questions

the use of letters to substitute unknown numbers to form an equation. solve the equation to get the unknown number using different methods such as simultaneous equations and more.

147 questions

biology is a branch of science that studies the nature of life from the smallest parts of living things to the largest plants and animals. ask and answer questions about the living world and its wonderful inhabitants in this category!

124 questions

this section covers topics of genetics such as variation, pedigrees, mendelian genetics and mutations.

122 questions

physics regards the physical aspects of the natural world. it includes topics that deal with forces on different bodies within the universe and phenomena that explain how the universe works.

112 questions

geometry = math of euclid. geometry is the branch of math known for shapes (polygons), 3d figures, undefined terms, theorems, axioms, explanation of the universe, and pi.

99 questions

ang kategoryang ito ay para sa mga katanungan nagtanong sa wikang tagalog. this category is for questions asked in the tagalog language.

96 questions

this category should include questions about greatest common factors and lowest common multiples.

81 questions

percentages are defined as a fraction or portion of a whole. generally percentages deal with an amount out of one hundred but can be used in sales, economics, and science. if you've walked into any store you're sure to find something marked a certain percent off. fractions are not whole numbers with a numerator over a denominator. usually the numerator and denominator are expressed as integers. there are four types of fractions: simple fractions, complex fractions, mixed fractions, and improper fractions. decimals are also not integers. they are expressed often like 0.34 and are often rounded off since some go for too long. both decimals and fractions are also used to convert to percentages.

80 questions

find questions about the important events of the united states of america from the us civil war to us presidents.

71 questions

definitions are the meanings of words.

71 questions

rounding numbers involves making the last number requested the last digit in the number and replacing all numbers after it with zeros. for example, rounding the number 23456 to the tens digit would result in the number 23460.

69 questions

numbers are our way to quantify, label, and organize the world around us in a logical manner. however, the systems used to obtain this goal differ geographically, historically, and by relative utility. all questions pertaining to numbers, including historic labeling systems, bases of numerical systems, constants, and the various ways they're grouped together, should be placed into this category.

69 questions

a truly healthy person has a sound body and mind that is free of disease and infirmity. healthy living includes taking the steps needed to optimize one's chances of surviving and thriving, like eating a healthy diet and exercising regularly. questions relating to all aspects of health and living a healthy life are welcome here!

65 questions

celebrities often go through a great deal of trouble to make themselves look young. if you're wondering how old a celebrity is, when they were born or when they died, this is the place to ask.

63 questions

the supreme law of the united states, the constitution provided the framework for the creation of the united states government.

62 questions

animals enrich our lives in so many different ways. the animal life category is for questions and answers about animals of all types, including pets, sea life, and farm animals. you can ask questions or find information regarding animals, their history, care, health issues, breeding, and behavior.

55 questions

includes questions related to the comprehension, usage and identification of the parts of speech used to name a person, place or thing

52 questions

this category is for questions and answers about forms of books and literature. the categories subtopics include authors, poetry, plays, classics, and many other literary elements.

51 questions

'history, politics and society' deals with the affairs of human beings. the categories overlap to a degree: 'history' describes changes in those affairs, and encompasses the other two; 'politics' is about how people govern themselves; and 'society' is about how people organize and conduct their lives. questions here range from ancient history to history-in-the-making, political views to decisions of lawmakers, and present and past societies and how people relate to each other within their societies.

51 questions

the study of plant life is known as botany. all questions related to plant sciences such as taxonomy are welcome here.

50 questions

human physiology is the study of the human body relevant to the functions of the organs and systems. it provides a biological baseline for the five senses including the different systems, so that the body can operate normally.

48 questions

solar power is the conversion of solar energy into electricity or thermal energy, either by indirectly using concentrated solar power or directly using photovoltaics โ€“ the use of solar panels which consist of various cells made of photovoltaic material.

47 questions

ever wanted to know the difference between a boysenberry and a blueberry? socialism and communism? windows and linux? look no further. this category answers your questions about 'the differences between...'

45 questions

questions about the properties and characteristics of elements as observed in nature and in compounds. chemical formulas are also converted to and from symbols in covalent or ionic bonds. all the questions you want to ask about the elements and the compounds they form.

44 questions

includes questions about the lives and families of writers as well as about their written works.

44 questions

economics is the study of production, distribution and consumption of goods and services whether in a city, country or a single business. questions about supply and demand and economic theory are welcome here.

41 questions

questions about hotels such as how to book a room, the top hotels in your area, and related topics.

41 questions