Set: Science Final

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All 117 Terms

Term Definition
metabolism the process of breaking down food and converting it into energy to be used by the body
synthesis taking simple stuff and building stuff that is more complex
stimuli allows the body to react/respond to the enviornment [heat, light, sound, vibration, odor]
energy all organisms use and release
proton mass 1 amu [atomic mass unit]
biotic factors plants, animals, humans, bacteria, insects
abiotic factors air currents, temperature, moisture, thunder, lightening, light, soil, water, gases in air
land, water, and atmosphere the 3 parts of the biosphere
ecosystem made up of biotic community & the abiotic factors that affesct it
habitat the place where an organism lives
producer make their own food by trapping sunlight & using it in photosynthesis
Primary consumer cannot do photosynthesis, and must obtain nutrients from other organisms (eat producers)
Secondary consumer cannot do photosynthesis, eat primary consumers
decomposer break down the remains of dead organisms
saprobe decomposer
photosynthesis how producers get their energy
carnivore eats only other animals
herbivore eats only plants
omnivore eats both plants and animals
food chain shows the simple flow of energy from one organism to another (arrows point in direction of energy flow)
food web interconnected network of food chains
pyramid of energy organisms use up ~90% of the energy the take in, only ~10% of energy is passed on when they get eaten
pyramid of numbers most organisms at the producer level, and the fewest at the secondary consumer level
mutualism both organisms benefit
commensalism one organism benefits, and the other is neither helped nor harmed
parasitism one benifits, and the other is harmed
lichen an organism that has a mutualistic relationship with fungus and algea
pollution contaminates the enviornment
atoms all matter is composed of
homeostasis regulation of steady life maintaining conditions inside an organism or cell despite changes in its enviornment
biosphere the portion of earth that supports life
element a substance that is made of atoms that are the same
compound a substance composed of 2 or more elements that are chemically combined
melting solid to liquid
energy of melting absorbed
evaporation liquid to gas
energy of evaporation absorbed
condensation gas to liquid
energy of condensation released
freezing liquid to solid
energy of freezing released
sublimation solid to gas
energy of sublimation absorbed
chemical symbol abbreviation of an element
chemical formula uses numbers & letters to represent the substance
chemical equation what happens in a chemical reaction
law of conservation of mass matter cannot be created not destroyed
organic compound elements carbon, hydrogen, oxygen, nitrogen
amino acids the building blocks of proteins
enzymes made of proteins
dehydration synthesis bonding of 2 molecules by removing a molecule of water
microscope helped scientists develop cell theory
vacuole stores nutrients/waste products, increases cell size during growth, regulates turgor pressure
chloroplasts holds chlorophyll, process: photosynthesis *plant only*
cell wall provides & mantains shape, protective barrier, made of cellulose
cytoplasm holds organelles in place, and contains water and chemicals
nucleus directs activities of the cell, contains genetic blueprints for a cell
mitochondria releases energy, process: cellular respiration
cell membrane protective barrier to keep out water, controles what goes in & out of the cell, made of proteins & phospholipids, 2 layers
ribsomes makes proteins
centrioles found in animal cells only
diffusion when molucules/atoms move to a higher concentration to a lower one
reactants of photosynthesis CO2, sunlight, and water [H2O]
products of photosynthesis O2 and glucose [C6H1206]
reactants of cellular respiration O2 and glucose [C6H1206]
products of cellular respiration CO2, 36 ATP (energy), and water [H2O]
interphase dna copies its self
prophase chromo's thicken, nuc mem disappears, centrioles move to end of cell, spindle fibers form
metaphase chromo's line up in middle of cell
anaphase chromo's seperate & spindle fibers pull them toward end of cell
telophase chromo's reach end of cell, spindle fibers disapear, nuc mem forms, cell mem pinches in, dividing into 2 cells
DNA genetic material is made of
function of DNA direct cell activities & has cell characteristics
A T
G C
T A
C G
chromosome rod shaped structure made of DNA that becomes visible when cells begin to divide. DNA wrapped around protein
heredity passing of traits from parent to offspring
genetics scientific study of heredity
gregor mendel father of genetics
dominant an allele that overshadows another allele
recessive an allele that gets overshadowed by another allele
purebred an organism with 2 alleles that are exactly the same for a trait
hybrid an organism that has 2 different alleles for a trait
phenotype the physical apperance of an organism
genotype the genetic make up of an organism
paired alleles traits are inherited in
asexual reproduction when one organism can produce offspring by itself
sexual reproduction when an egg is fertilized by a sperm
male sex cell sperm
female sex cell egg
50% probability the baby will be a boy
50% probability the baby will be a girl
pedigree chart used to show alleles being passed down from one generation to the next
sedimentary rocks most fossils are found in
oldest rock layers at the bottom
newest rock layers at the top
mutation a change in the DNA or chromosomes of a cell. can be passed to offspring. some are harmless, some are harmful, and other are helpful
adaptation a trait that makes an organism better able to live in an enviornment *some are caused by mutations*
darwins theory of evolution natural selection
extinct no more of this organism alive on earth
endangered in danger of becoming extinct
cotyledon a food supply for a baby plant, which is inside the seed. stores food while it is maturing.
evergreen a tree that does not lose its leaves in the winter, and stays green all year round
decideuous a tree that loses its leaves in the winter
roots absorb water & minerals, anchors the plant
stem has vascular tissue, provides support, holds leaves toward sun
leaves do photosynthesis
flowers attract pollinators, hold the reproductive parts
seeds protects new plant, feeds the plant with cotyledon
fruit spreads the seeds through pollination
pistil female part, contains the stigma, style, ovaries
stamen male part, contains the anther and filament
exo-therms fish, amphibians, reptiles
endo-therms birds, mammals
regeneration when a part of an organism breaks off and becomes a new organism

Set Information

Terms 117
Creator ariesangel416
Created June 17, 2008
Group QuiltBuddies
Tags science, final, 7th grade
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Description

7th grade science finals...! studyy studyy stuuudddyyyy !!!!

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ariesangel416 : Changed interphase → dna copis its self to interphase → dna copies its self
ariesangel416 : Changed secual reproduction → when an egg is fertilized by a sperm to sexual reproduction → when an egg is fertilized by a sperm
ariesangel416 : Changed energy od condensation → released to energy of condensation → released
Last Message: 2 months ago

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Most Missed Words

  1. ribsomes → makes proteins - 2 misses
  2. seeds → protects new plant, feeds the plant with cotyledon - 2 misses
  3. metabolism → the process of breaking down food and converting it into energy to be used by the body - 1 miss
  4. biotic factors → plants, animals, humans, bacteria, insects - 1 miss
  5. land, water, and atmosphere → the 3 parts of the biosphere - 1 miss
  6. Primary consumer → cannot do photosynthesis, and must obtain nutrients from other organisms (eat producers) - 1 miss
  7. Secondary consumer → cannot do photosynthesis, eat primary consumers - 1 miss