CSET Multiple Subjects Subtest 2: Math, Science Question well answered 2023

CSET Multiple Subjects Subtest 2: Math, Science Question well answered 2023Order of Operations PEMDAS Parentheses Exponents Multiplication Division Addition Subtraction (between roots and exponents, do whatever comes first in the problem) What is the easiest way to find a common denominator? multiply all the denominators How do you multiply fractions? multiply numerator x numerator mutiply denominator x denominator (don't need a common denominator) how do you divide fractions? flip the second fraction and then multiply Z^-2 1 --- z x z perfect square number Taking a positive integer and multiplying it by itself equals a perfect square. Example: 3 x 3 = 9 9 is a perfect square. what is the distributive property? A (B+C) = AB + AC what is the opposite of distributing? factoring what does the commutative property of addition and multiplication tell us? order does not matter a + b = b + a a x b = b x a what does the associative property of addition and multiplication tell us? grouping does not matter A + (B + C) = (A + B) + C identity property of addition any number + 0 equals itself identity property of multiplication any number x 1 equals itself cerebral cortex part of the nervous system; 4 lobes, spatial awareness, consciousness, language, vision (thinking) cerebellum part of the nervous system; gray area in back, timing of motor movement brain stem part of the nervous system; cord, life support, respiration, heartbeat, active during sleep digestive system salivary glands - produce saliva to get food down esophagus esophagus - passageway for food stomach - uses gastric acid and enzymes to break down food even more pancreas - creates enzymes that stomach uses small intestine - long, absorption of nutrients into body takes place here large intestine - waste is collected rectum - waste is released arteries veins take blood from the heart out to the body take blood back to the heart where are blood cells created? in bone marrow white blood cells red blood cells healers, help fight diseases carry oxygen and nutrients what is the key advantage of sexual reproduction? (as opposed to asexual reproduction) greater genetic variation (there can be many types of an organism) how do the following plants reproduce? algae fungi ferns angiosperms gymnosperms algae - asexually fungi - asexually ferns - both asexually and sexually angiosperms (flowering plants) - sexually gymnosperms (cone plants) - sexually What evidence supports Darwin's theory of evolution (adaptation)? fossil records comparative anatomy DNA sequences AD taxonomy categorizing living things kingdom (least specific) phylum class order family genus species (most specific) What is the lifecycle of a butterfly? 1. egg - laid on a leaf on purpose 2. larvae or caterpillar - eat all day 2. pupa (cocoon) - metamorphasis 4. adult - butterfly, imago stage, only alive a few weeks and mate for most of it What is the lifecycle of a frog? 1. egg 2. tadpole (polywog) - gills and tail 3. tadpole with legs - back legs first then front 4. froglet - converts to breathing air, crawls onto land 5. adult frog - no tail What is the lifecycle of a mouse? mice are mammals and warm blooded, they look like their parent when they're born (as oppose to buttery or frog) 1. born without hair - deaf and blind 2. childhood - have hair, eat solid food 3. adults - reproduce what is the opposite of photosynthesis? respiration photosynthesis -plants use a chemical called chlorophyll to absorb solar energy -use a chemical reaction that creates carbohydrates -plants take in water and carbon dioxide and get rid of carbon based nutrients and oxygen