Definition of Cellular Respiration Cellular respiration refers to the biochemical pathway by which cells release energy from the chemical bonds of food molecules and provide that energy for the essential processes of life. It can also be defined as the set of the metabolic reactions and processes that take place in the cells of organisms
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Word Problem Involving Quadratic Equations Write a “let” statement and equation for each example. Explain the difference. Find two consecutive integers whose sum is 13 Let x = first integer x + 1 = second integer x + x + 1 = 13 Find two consecutive two consecutive integers whose products is 42 Let x
Rounding off numbers To ’round off’ or ‘approximate’ a number to a desired degree of accuracy, we round the number up if the next digit is 5 or more round the number down if the next digit is less than 5. We represent approximately equal to as and approximately as ‘~’ Examples: 73 is close to 70 if approximating
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What is Reproduction? Reproduction means the act of bringing to life young ones that are of the same species. In other word, reproduction is the creation of a new individual or individuals from previously existing individuals. Types of Reproduction There are two types of reproduction. These are: Asexual Reproduction: Only one organism divides to form
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Concepts of Time Time itself can be defined as that in which developments and happenings can be distinguishably analyzed with reference to before and after. In the International System of Units (SI), the unit of time is the second (symbol is S). The most natural time unit is the solar day which is manifested by
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Adding and subtracting directed numbers Numbers can be shown on a number line which extends above and below zero. This gives positive and negative numbers. The signs + and – show the direction from 0. Positive and negative numbers are called directed numbers. To add a positive number, move to the right on the number
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Factors, Prime factors (revision) 40 ÷ 8 = 5 and 40 ÷ 5 = 8 8 and 5 divide into 40 without remainder. 8 and 5 are factors of 40. A prime number has only two factors, itself and 1, but 1 is not a prime number. 2, 3, 5, 7, 11, 13, … are prime
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Introduction Carbohydrates (saccharides) – Molecules consist of carbon, hydrogen and oxygen atoms. A major food source and a key form of energy for most organisms. When combined together to form polymers, carbohydrates can function as long term food storage molecules, as protective membranes for organisms and cells, and as the main structural support for plants
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Introduction The method of solving “by substitution” works by solving one of the equations (you choose which one) for one of the variables (you choose which one), and then plugging this back into the other equation, “substituting” for the chosen variable and solving for the other. Then you back-solve for the first variable. Solve the
What is Matter? Matter is anything that has mass and occupies space. There are 3 states of matter, solids, liquids and gases. Examples of matter include the plants animals around us, the food we eat, the water we drink and even the air we breathe. In general, matter is built up of one or more
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