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97 terms

Science Exam Review

STUDY
PLAY
Cell
Basic unit of stucture and functionin living things
Cell Membrane
Controls what cen enter or leave the cell
Cell Wall
Rigid layer that surrounds plant cells
Cytoplasm
Gel-like substance between the nucleus and cell membrane
Cholorplast
Captures energy from sun and uses it to produce food for plants
Endoplasmic Reticulum
Transports proteins in the cell
Golgi Body
Packages proteins in the cell
Lysosomes
Breaks down particles in the cell
Mitochondria
Produces energy for the cell
Nucleus
Directs all the cell's activities
Ribosomes
Where proteins are made in the cell
Vacuoles
Storage area for the cell
Circulatory System
Carries needed materials to the body cells; carries wastes away from body cells; helps fight diseases
Digestive System
Takes food into the body, breaks foo down, and absorbs the digested materials
Endocrine System
Controls many body processes by means of chemicals
Excretory System
removes wastes
Immune System
Fights diseases
Muscular System
Enables the body to move; moves food through the digestive system; keeps the heart beating
Nervous System
Detects and interprets information from the environment outside the body and from within the body; controls most body functions
Reproductive System
Produces sex cells that can unite to create offspring; controls male and female characteristics
Respiratory System
Takes oxygen into the body and eliminates carbon dioxide
Skeletal System
Supports the body, protects it, and works with muscles to allow movement; makes blood cells and stores some materials
Skin System
protects the body, keeps water inside the body, and helps regulate body temperature
Alleles
Te different forms of a gene
Dominant
An allel whose trait always show up in the organism
Genetics
Scientific study of heredity
Genotype
An organism's genetic makeup
Heredity
Passing of traits from parents to offspring
Heterozygous
Having two different alleles for a trait
Homozygous
Having two identical alleles for a trait
Phenotype
An organism's physical appearance or visible traites
Probability
The likelihood that a particular event will occur
Punnett Square
A chart that shows all the possible combinations of alleles that can result from a genetic cross
Recessive
An allele that is masked (covered up) when a dominant allele is present
Trait
A characterisitic that an organism can pass on to its offspring
Atom
The smallest particle of an element
Protons, Neutrons, and Electrons
These are particles of an atom
Proton
Positively charged particles of an atom
Electrons
negatively charged particles of an atom
Neutrons
Neutral
Nucleus of an Atom
This contains protons and neutrons
Outside
The electrons surround the ______________of the nucleus of an atom
Atomic Number
This is equal to the number of protons and electrons
Atomic Mass
This minus the atomic number equals the number of neutrons of an element
Ion
Atoms that have become electrically charged
Positive Ion
The loss of an electron
Negative Ion
The gain of an electron
Covalen Bonding
This occurs when atoms share electrons
Ionic Bond
This occurs when there has been a loss/gain of electrons
Exothermic Reaction
Releases energy after a reaction
Endothermic Reaction
Absorbs energy after a reaction
Period
Horizontal row of elements in the periodic table
Group/Family
Verticle column of elements in the periodic table
Al
Aluminum
Ca
Calcium
C
Carbon
Cl
Chlorine
Cu
Copper
Au
Gold
He
Helium
H
Hydrogen
I
Iodine
Fe
Iron
Pb
Lead
Mg
Magnesium
Hg
Mercury
Ni
Nickel
N
Nitrogen
Ne
Neon
O
Oxygen
P
Phosphorus
Pt
Platinum
K
Potassium
Ag
Silver
Na
Sodium
S
Sulfur
Sn
Tin
Zn
Zinc
Na2CO3
Washing soda
H2O
Water
C3H8
Propane
CO
Carbon monoxide
CO2
Carbon dioxide
NH3
Ammonia
NaCl
Sodium choloride
NaHCO3
Baking soda
CH4
Methane
C3H8O
Alcohol
C12H22O11
Sucrose
Indicator
A compound tht changes color when in contact with an acid or a base
pH scale
Range of values from 0-14 that express the concentration of hydrogen ions in a solution
Acidic
Less than 7
Basic
More than 7
7
This is neutral
Density
Mass / volume
Volume
Mass / density
Mass
Density X volumn