SCIENCE EXAM STUDY Flashcards
what organelles are not found in animal cell
chloroplast, vacuole
why is cell reproduction important in celled-organisms
- maitain growth, repair
- cytokensis; cells seperate
what are the events that take place before phrophase
- G1 –> cell growth
- S –> synthesis, DNA copied
- G2 –> DNA condences into cromosomes, centrioles & spindle fibres formed
behavour of cancer cells
- rapid growth
- harms other organs when too big
- consume nutrience
- spreads
what is the purpose of gas exchange
- supply oxygen to cells
- remove carbon dioxide
what are the components of gas exchange system in an animal
any system that deliver gas to/ from blood stream
–> diaphram
–> gills in fish
why are there tubes and vessels important in a circulatory system
- give/ exchange blood
- collect waste products
- help maintain blood pressure
what does the circulatory system transport
blood, oxygen, nutrience
draw phases of mitosis
- prophase –> chromosomes in dissolving nucleus, chromatin moving to opposite sides
- metaphase –> chromosomes line up in the middle of the cell, spindle fibres attatched
- anaphase –> chromosomes get pulled by spindle fibres
- telophase –> new cell starts to form, new chromasomes in new nuclous
how is the electron arrangement of an ion the same as its nearest noble gas
both gain/ lose electrons to create a stable valence shell
in reaction with non metals, metals tend to do what
lose electrons
is copper (I) chloride & copper (II) chloride an ionic compound
yes, transfer electrons
origionaly copper is covalent but with the non-metal, becomes ionic
why do molecular compounds have covalent bonds
they share electrons (molecular)
what is a chemical change
when a new substance occurs
what is a physical change
changes the look of the substance without changing the acutal substance
what does a balanced chemical equation indidcate in terms of the condervation of mass
its a chemical reaction
mass of gass equation
MOG = mass mixture - (mass of sol’ A + mass of sol’ B)
in chemical equations, what does the coefficient and the subscripts mean
coefficient –> the # of the molecule
subscript –> the # of the single atom
name all the general formulas
synthesis: A+B–>AB
combustion: A+O–>AO
decomposition: AB–>A+B
single displacement: A+BC–>AC+B
double displacement: AB+CD–>AD+BC
neturalization (double displacement): product always has salt+water
what is the difference between embrotic stem cells and tissue stem cells
embryonic –> can form into any type of cell (comes from embryoeds
tissue –> can form into some type of cells
what is the link inbetween the circulatory system and the respiratory system
- the circulatory system transports oxygen from the respritory to body tissues/ organs
- carries carbon dioxide back to the lungs for exhalation
what is the link between the circulatory system & the digestive system
- the food creates nutrients in the intestines
- blood absorbs nutrients which gets moved to the rest of the body
what do the symbols mean (S) (G) (AQ) (L)
S –> solid
G –> gas
L –> liquid
AQ –> aqueous
what is the difference between an incandescent light bulb emitting light and a laser emitting light
- incadesent lights –> create a big scattered light with many different light rays
- lasers –> create one light ray going in one direction
