Preparation /PECT Module 3 Practice Exam With
Complete Questions And Correct Answers |Already
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What can a teacher use to promote factions are part of a whole? - ans -Pattern
blocks
How do you explain why extra engird does not get passed on? - ans -All energy for
life on Earth comes from the sun. After the energy leaves the sun, it is used by
plants on Earth where photosynthesis converts it to sugars. The plants store
chemical energy that can be used by the plants, or converted into mechanical
energy within an organism (e.g. an animal which eats the plant.) Photosynthesis is
the process that explains how energy from the sun is captured by green plants
and used to make food. Most of this energy is used to carry on the plant's life
activities. The rest of the energy is passed on as food to the next level of the food
chain. The figure at the left shows energy flow in a simple food chain. Notice that
at each level of the food chain, about 90% of the energy is lost in the form of
heat. The total energy passed from one level to the next is only about one-tenth
of the energy received from the previous organism. This means that an animal
eating a plant will only get about ten percent of the energy that the plant gets
from the sun. The remainder of the plant's energy is unusable as energy by the
animal. Therefore, as you move up the food chain, there is less energy available.
Ordinal Numbers - ans -A number that tells the position of something in a list
(first, second, third)
Cardinal Numbers - ans -Are numbers that say how many of something there are,
answers the question "How many?"
Base of 10 - ans -Base 10 refers to the numbering system in common use. Take a
number like 475, base ten refers to the position, the 5 is in the one's place, the 7
is in the ten's place and the 4 is in the hundred's place. Each number is 10 times
the value to the right of it, hence the term base ten.
, Additive and multiplicative identity - ans -What number you use to get the same
number back. For addition, you add 0 to keep the same number, and with
multiplication you multiply by 1 to keep the same number.
Additive property - ans -numbers can be expanded and written in terms of its
place value (Ex: 452=400+50+2)
Mean - ans -Average of all numbers. Add numbers and divide by number of
numbers.
Median - ans -Put numbers in numerical order. Then find the middle number.
Mode - ans -The number that occurs most in a set of numbers
Range - ans -The difference between the lowest and highest number
Dichotomous Key - ans -A dichotomous key is a tool that allows the user to
determine the identity of items in the natural world, such as trees, wildflowers,
mammals, reptiles, rocks, and fish. Keys consist of a series of choices that lead the
user to the correct name of a given item. "Dichotomous" means "divided into two
parts".
Prime Number - ans -A natural number greater than 1 that is not a prime number
is called a composite number (2, 3, 5, 7, 11, 13)
Composite Number - ans -A composite number is a positive integer that can be
formed by multiplying together two smaller positive integers (4, 6, 8, 9, 10, 12)
Distributive Property - ans -The distributive property tells us how to solve
equations in the form of a(b + c). The distributive property is sometimes called
the distributive law of multiplication and division. 2(3 + 6) = 2(9) = 18
Commutative Property - ans -In mathematics, a binary operation is commutative
if changing the order of the operands does not change the result. (3 + 4 = 4 + 3 or
2 × 5 = 5 × 2)