Scientific Method
what is an independent variable?
it is the variable being manipulated
the scientist chooses what is being compared in the experiment
what is an abiotic factor?
an abiotic factor is a nonliving thing in the environment
ex: sunlight, water, wind, soil.
what is evolution?
the process by which the heritable traits within a population of organisms change over successive generations
what is the planet closest to the sun?
mercury
Sara wants to see if a new brand of hair dye lasts longer than the brand she currently uses. She puts the new hair dye on the left side of her head and the old brand on her right side. After 2 weeks she observes which side of her head has more gray hair showing through.
what is the control group in this scenario?
the control is the original hair dye
what is the name of the relationship where one species benefits while the other is negatively affected.
parasitism
what is variation?
refers to the differences observed between individuals of the same species
how many bones are in an adult human skeleton
206 bones
in what format is the hypothesis supposed to be written in?
if, then , because statements
ex: if i do this, then this will happen, because of this reasoning.
what is the difference between an invasive species and an introduced species?
an introduced species has beneficial aspects, and also has predators that exist in the environment.
an invasive species is a nonnative species that does not have any natural predators
what is the difference between homologous and analogous structures?
homologous: same structure but different function (human forearm compared to a dog's arm)
analogous: same function but different structure
( butterfly wings compared to a birds wings)
what does all science start with?
all science begins with a question or observation
Rob is in charge of waxing the floor at the local mall. He wants to test a new brand of floor wax called Squeaky Clean. Rob waxes 20 floor tiles with Squeaky Clean and 20 tiles with the original wax brand. After one week he counts the number of scratches on the floor.
a. Independent Variable = ________________________________________
b. Dependent Variable = _________________________________________
IV: type of floor wax used
DV: the number of scratches on the floor
what are the 4 types of relationships discussed
predator-prey
commensalism
mutualism
parasitism
what is a mutation?
a mutation is any change in the DNA of an organism
if you are attacked by a bear in the forest, with which species of bear are you supposed to fight for your life and NOT play dead.
a black bear
Eric wants to see if a Shark vacuum works better than his current Oreck. He makes sure both of the vacuum canisters are empty, and then vacuums half of the living room with the Oreck and the other half with the Shark. After vacuuming he measures the amount of dust in each canister.
a. Independent Variable = ________________________________________
b. Dependent Variable = _________________________________________
IV: the type of vacuum used
DV: the amount of dust in each canister
from smallest to largest, what are the ecological levels of organization?
individual, population, community, ecosystem, biome, and biosphere
list 3 of the 5 main mechanisms of evolution
what is the name of the tropical storm that is about to make landfall off the east coast?
tropical storm Milton