EARTH SCIENCE part 2
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EARTH SCIENCE part 2
what is an atom?
matter consists of small particles
what is an element
matter made of identical atoms
what is an electromagnetic wave
one of the waves that are propagated by simultaneous periodic variations of electic and magnetic feild intensity and that include radio waves,infrared visible light, UV, xrays and gamma rays
what is a wavelength?
distance btw waves
what is a galaxy
an assembly of millions of stars, nebulas and planets
what is a solar system?
these heavenly bodies(sun planets moons asteroids and comets
what is an electomagnetic spectrum?
all of these forms of radiation are related to one another
what is an electromagnetic radiation?
many different types od electromagnetic waves.
what is a the bright line spectrum?
chemical bar code or fingerprint identitying the specific element that producesd it through the color it emits
what is a spectroscope?
whic is atool that uses prism to separate wave lengths of light
what is a red shift?
change in poistion of the spectral lines
what is a doppler effect?
change in pitch of a sound wave caused by stretching or compression
what is a background radiation?
leftover radition from the big bang
what is a scientifi theories?
are our best current explantion of observed and mesured facts
what is subatomic particle?
protons and nuetrons and electrons
what is hydrogen helium and lithium?
three smallest elements
what is aparticle acccelerators?
high speed particle reactors
what is a nebula?
large clouds of dust and gas
what is a protostar
ball of hydrogen gass
what is fusion?
the process where small atoms are smashed together so that their center (nuclei) merger, becoming larger atom
what is a radiation pressure?
caused by the fusion of hydrogen into helium in the core
what is a main sequence star?
what is a blue giant?
star that are big and hot
what is a yello dwarf?
fuse hydrogen slowly
what is a super nova?
a shock wave develops which bounces off the core, tearing through the layers of the star, shockwave triggers runaway nuclear fusion ar a fantastic rate adn the star explodes
why do we need water?
it helps moderate climate
helps in reprodutions
it captures heat
what are the other planets?
what are the inter planets?
what is ecology?
the science that seeks to understand how the biotic and abiotuc parts of aregion work 2gether to make a healthy vital enviroment.
what is a biosphere?
all living organisms
what is a biotic factor?
living organisms in an area and the recently dead organic matter
dead leaves, fallen log, animal carcass etc
what is a population?
all the members of one species in an area form
what is a niche?
the role these organisms play in the web of life
what is abiotic factor?
the raw materials of the land and wate, and conditions like the climate sunlight and tep
what is a ecosytem?
is a natural area or region mad up of all the plants animals, microbes, and otheer life forms as they interact with one another and with the physical enviroment
what is a energy?
is the ability to do work
what is the law of conservation of energy?
it states that nrg cannont be created of destroyed
what is the second law of thermodynamics?
when ever nrg changes forms some energy is lost as waste heat
what is efficiency?
the ratio of the usedful energy deliverd by a dynamic system to the energy supplied to it
what is photosynthesis?
is the process plants use to convert sunlight energy into food molecules
what is chlorophyll?
this chemical triggers the reaction taht akes carbon dioxide from thr air and combines it with water
what is a glucose?
the substance formered by photosyntheses,
a simple sugar that is used by every type of cell
what is chemosynthesis?
the base of their food ,owas a type of bacteria that converted inorganic chemicals like hydrogen sulfide(H2s) into food molecules
what is a calorie?
the amount of heat neede to warm one gram of water one degree celsius
what is a food calorie
is equal to one thousand small calorie
what is a food chain?
the way in which an organism gets its food energy
what is a producer?
these are organisms that can manufature their own food
what is a consumer?
depend on other living things for their food
what is a tropic or feeding levels?
feeding or nutrional intake
what is a decompser?
feed on and break down dead protoplasm
what is a autotrophs
what is a carrying capacity?
the max number of plants of animals that can be indefinitely maintained by the ecosytem
what is a test group?
the group being evaluted
what is a expiremental variable?
variable tessted for infulence of change
what is a randomization?
selcetion in an unplanned manner
what is a biome?
large scale ecosystems that have distinct types of plants, animals , miccroorganism, soil and climatic condtions
what is a bio diversity?
a vast array of diiferent living things
what is a sustainability?
the ability to adapt, survive, and grow even in a changing enviroment
what is a bio mass?
the total mass of the lving things in a region
what is a habitat loss?
loss of space for many species
what is extinct?
species dies off no longer found alive
what is a competion?
humans outcompete other organism for the resource of earth
what is a climate change?
earth being warmed or cooled
what is over specializtion?
at times nature creates a species that is so specific to one typer of food habita or behaviour taht it cannot survive even the slightest change int eh enviromet
what is a monoculture?
the lack of biodiversity