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Math, Science rated A
Order of Operations - correct answer ✅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? - correct answer ✅multiply all the denominators How do you multiply fractions? - correct answer ✅multiply numerator x numerator mutiply denominator x denominator (don't need a common denominator) how do you divide fractions? - correct answer ✅flip the second fraction and then multiply Z^-2 - correct answer ✅ 1
z x z
Math, Science rated A
perfect square number - correct answer ✅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? - correct answer ✅A (B+C) = AB + AC what is the opposite of distributing? - correct answer ✅factoring what does the commutative property of addition and multiplication tell us? - correct answer ✅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? - correct answer ✅grouping does not matter A + (B + C) = (A + B) + C identity property of addition - correct answer ✅any number + 0 equals itself identity property of multiplication - correct answer ✅any number x 1 equals itself
Math, Science rated A
white blood cells red blood cells - correct answer ✅healers, help fight diseases carry oxygen and nutrients what is the key advantage of sexual reproduction? (as opposed to asexual reproduction) - correct answer ✅greater genetic variation (there can be many types of an organism) how do the following plants reproduce? algae fungi ferns angiosperms gymnosperms - correct answer ✅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)? - correct answer ✅fossil records comparative anatomy DNA sequences
Math, Science rated A
taxonomy - correct answer ✅categorizing living things kingdom (least specific) phylum class order family genus species (most specific) What is the lifecycle of a butterfly? - correct answer ✅1. egg - laid on a leaf on purpose
- larvae or caterpillar - eat all day
- pupa (cocoon) - metamorphasis
- adult - butterfly, imago stage, only alive a few weeks and mate for most of it What is the lifecycle of a frog? - correct answer ✅1. egg
- tadpole (polywog) - gills and tail
- tadpole with legs - back legs first then front
- froglet - converts to breathing air, crawls onto land
- adult frog - no tail What is the lifecycle of a mouse? - correct answer ✅mice are mammals and warm blooded, they look like their parent when they're born (as oppose to buttery or frog)
Math, Science rated A
sum - correct answer ✅the answer to an addition problem plant cell - correct answer ✅vacuole - holds waste chloroplast - processes light energy from sun and converts into sugar for the plant to have energy cell wall - thicker than in an animal cell, gives the cell structure what is mitosis? - correct answer ✅cell division - creates diploid cells what is meiosis? - correct answer ✅cell division - creates sex cells, haploid cells left ventricle - correct answer ✅pumps oxygen rich blood out to other parts of the body parts of the heart - correct answer ✅The right atrium receives oxygen-poor blood from the body and pumps it to the right ventricle. The right ventricle pumps the oxygen-poor blood to the lungs. The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle. The left ventricle pumps the oxygen-rich blood to the body. osmosis - correct answer ✅water moving across a permeable membrane from a place with more salt to a place with less salt. what environmental factors affect plants? - correct answer ✅light
Math, Science rated A
gravity stress how do we get our month system? - correct answer ✅based on the moon's orbit around the earth spring tides - correct answer ✅when the sun and the moon are in alignment, we get more extreme tides neap tides - correct answer ✅when the sun and the moon are perpendicular, we get less extreme tides nebula - correct answer ✅how stars begin, as huge clouds of dust and other particles protostar - correct answer ✅when a nebula contracts and all the particles combine and ignite a nuclear reaction life cycle of a star - correct answer ✅nebula protostar adult star - becomes denser collapses - into brown dwarf, white dwarf, neutron star, nova, or black hole
Math, Science rated A
mantle crust 3 types of rocks - correct answer ✅igneous sedimentary metamorphic weathering - correct answer ✅chemical - acid rain physical - ice, wind, rain barometric pressure - correct answer ✅use it to predict weather low pressure generates storms integer - correct answer ✅a positive or negative number and 0 whole numbers - correct answer ✅counting numbers and 0 not prime - correct answer ✅a composite number improper fraction - correct answer ✅numerator is bigger than the denominator volume of a cylinder - correct answer ✅πr2 x h (radius x height)
Math, Science rated A
what is an example of newton's third law? - correct answer ✅an inflated balloon moves through the air when a jet of air leaves its neck as it deflates Which chamber of the heart labeled in the diagram above is primarily responsible for pumping blood to most of the organs and tissues of the body? - correct answer ✅left ventricle what is an example of cell division where the genetic material is halved? - correct answer ✅a cell in the testes of a male sparrow divides and produces 4 sperm T/F the full moon is never in the sky at the same time as the sun - correct answer ✅true common factor vs common multiple - correct answer ✅ tile problem from practice test - correct answer ✅find the factors for each side the factors in common are the square sizes √ 8 - correct answer ✅√ (2 x 2 x 2) = 2√ 2
Math, Science rated A
ionic bonds in compounds - correct answer ✅with a metal (sodium) and nonmetal (chlorine) metallic ion gives up electron nonmetallic ion takes electron water pressure increases with depth - correct answer ✅the deeper the water, the greater the pressure symbiotic relationships - correct answer ✅whale and barnacle egrets and rhinocerous fungi and orchids predator prey relationship - example - correct answer ✅fox and chicken how far back can you date something based on Carbon 14 half lives? - correct answer ✅radioactive dating only works for 50,000 years how would you date a moon rock? - correct answer ✅by the ratio of radioactive potassium to argon (based on the amount of radioactive material left) what is the amount of increase of the energy released for every point on the richter scale? - correct answer ✅31.7 times increase so from 4 to 6 it's 31.7 x 31.7 since its a two point increase
Math, Science rated A
weather in low pressure vs high pressure area - correct answer ✅low pressure has poor weather high pressure has improving weather how much of the moon is lighted during the first and third quarter? - correct answer ✅half
