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100 FACTS SCIENCE
Terms in this set (100)
________are the building blocks of matter and are the smallest unit of an ________
There are three basic particles in the atom _______, neutron, and ________
a______ is composed of two or more ______ chemically combined
_______ are pure substances that cannot be simplified and made up of one kind of _______
mixtures can be separated by physical means as ________, sifting, or ________
_______ are not uniform and substances can be visibly distinguished
______ are uniform and substances cannot be visibly distinguished
the atoms or molecules of a _______ form a pattern that only allows the atoms to _______
In a _____ the atoms or molecules move about freely and collide randomly
Protons, Chemical reactivity
An atom's identity is directly related to the number of ______ and can be used to predict the ______
Alkali Metals, one
The ______ in group _____ are the most reactive metals
The _____ in group _______ are the most reactive nonmetals
noble gases, eighteen
The _____ in group ___ are the least reactive elements
_______ lose elections and _____ gain electrons
Physical changes, phase
__________ don't change chemical composition such as size, shape and ______
as long as the substance is boiling the temperature of the liquid remains _________
Density is a __________ property that describes the relationship between _____ and volume
________ describe how a substance is going to react with other substances such as oxygen and acids
Chemical Change, precipitate
a ________ result in the formation of a new substance such as a ______ or gas
Surface area, catalyst
Reactions occur at different rates, based on concentration, temperature, _______ and the presence of _____
______ have a pH of less than 7 and ______ have a pH of more than 7.
Law of conservation of matter
the __________ states the number of atoms and mass stays the same no matter how they are arranged.
________ are replaced through natural process at a rate that is equal to or greater than the rate at which they are being used.
________ are exhaustible because they are being extracted and used faster than they are formed .
salinity in ocean waters is increased by _______ or by freezing of sea ice and decreased as result of rainfall, _____________ or the melting of ice.
__________all over the world are regulated by the circulation of heat by the oceans.
water cycle, sun
the ________ is the continuous movement of water in and around the earth and is driven by the __________
A________________is the portion of land that drains into a river and its tributaries.
____________ are areas where fresh and salt water mix, producing variations in salinity and high biological activity.
____________happens when warm surface water near costal areas is blown offshore by winds causing cooler
nutrient rich water to rise.
Cold water with low _________ and high _________hold the most amounts of ocean gases.
Dissolved carbon dioxide in oceans form __________ that is used to make ____________.
Physical variable that affect the health of water system are ________,_____________ and water movement.
chemical variable that affect the health of water system are dissolved ____________ and other gases, ___________
salinity and nutrients.
Ecosystem include both _________ and _____________ factors
A group of the same organism that can be interbreed are called___________.
A ____________ is a group of organisms belonging to the same species that lives in a particular area.
Different populations make up ____________.
_________ describes the variety of species found in earth's ecosystem.
__________ measures the number of individuals organisms living in a defined space.
_______________ is an interaction between species in which one species ( the predator ) eats the other (prey).
____________ is a relationship that occurs when two or more organisms need the same resource at the same time.
An ecological _________ refers to the role of an organism in its environment including type of food it eats, how it obtains it food, and how it interact with other organisms.
____________ exists between organism of two different species that live together in direct contact.
_____________ is a symbiotic relationship in which one organism benefits at the expense of another organism
______________ is a symbiotic relation in which both organisms benefit
______________produces molecules that serve as fuel and building material for all organism
______________ use the energy in light to make glucose from carbon dioxide and water through the process of ____________ whish also releases oxygen.
____________ obtain food from eating plants or eating other animals.
aerobic cell respiration
During ________________ oxygen reacts with glucose to provide energy an produce carbon dioxide waste.
_____________ recycle nutrients from dead plants or animals matter back to soil.
Primary consumers that eat green plants are called__________.
Consumers that only eat other consumer are called___________.
Consumer that eat both plants and animals are called___________.
Another term for producers is an ____________ while another term for consumers is a _________________.
In food chain, only ______ of the energy is transferred to the next organism.
____________ explores microscopic organisms including viruses, bacteria, protists, and some fungi.
_________ are non-living particles composed of either DNA or RNA and need a host cell to reproduce.
____________ are complex and contain membrane bound organelles (Ex. plant and animal)
_____________are simple ,unicellular. and do not contain membrane bound organelles (ex: bacteria)
Bacteria reproduce through ___________, a form of sexual reproduction.
_____________ involves 1 parent and offspring that is genetically identical to the parent.
___________ in bacteria occurs when mutated bacteria survive exposure to an antibiotic and form a new resistant population of bacterial
____________ are eukaryotic decomposers.
__________ can become airborne ,be inhaled, and trigger an allergic reaction in some people.
a ________ is an organism that feeds on another, called ______
a __________ is an outbreak of a disease that is wide spread, usually worldwide , while an _________ is confined to a particular region.
__________ is the use of living organisms to solve problems and make useful products, such as food and medicines.
__________ provides molecules that serve as fuel and building material for all organisms.
_________ carry on the many functions needed to sustained life.
through the process of ______________ cells convert energy (glucose) to a usable form of energy (ATP)
____________ moves within organisms through a series of chemical reactions in which food is broken down and rearranged to form new molecules.
a balanced __________combined with regular________ aid in the overall general health of the body.
______________ is the set of chemical reactions involved in storing fuel (food) molecules and converting fuel (food) molecules into energy.
change in a species over time is called _____________
species acquire adaptations, which leads to ____________ in populations.
comparing _________ can be used as evidence for evolution
____________ allows scientists to examine the relationship between organisms and contract evolutionary trees.
living things evolve in response to changes in their _________
the theory of ___________________ states that organisms with beneficial variations will survive to pass on their traits to the next generation.
in every population, _______________ exists within the inherited traits of the individuals.
changes in ___________________can affect the survival of individual organisms and entire species.
the greater the __________________ within a species , the greater chances are for that species to survive during environmental changes.
____________ found in ______________ rocks are preserved remains or traces of organisms that provides evidence of how life and the environment have changed.
__________ forms when sediments bury an organism and the sediments change into rock leaving the shape of the organism.
___________forms when a mold is filled with sand or mud that hardens into the shape of the organism.
_____________ forms when materials soak into the buried remains ,replacing the remains , and changing them into rocks.
____________ forms when entire organisms or parts of organisms are prevented from decaying by being trapped in rock, ice, tar, or amber.
_____________ forms when organisms or parts are pressed between layers of soft mud or clay that hardens squeezing almost all the decaying organism away leaving the carbon imprint in the rock
____________ forms when the mud or sand hardens to stone where a footprint, trail, or burrow of an organism was left behind.
the four eras of earth's history in order are ______________, Paleozoic, Mesozoic, and __________
humans first appeared in the _____________ era
Invertebrates , amphibians
the mass extinction that ended the Paleozoic ear caused most marine _________________ as well as __________ to disappear
Reptiles, dinosaurs small mammals, birds and flowering plants appeared in the ________________ era
law of superposition
the ______________ states that each rock layer is older than the one above it.
_________________ are organisms that existed fir short period of time that can be used to date rocks
Carbon-14, absolute dating
______________ dating is an example of ___________ in which radioactive parent atoms decay into more stable daughter atoms
_____________________ contain layers of ice that record the atmospheric composition at the time it was formed
in a _______________ fault, two pieces of land change their vertical position compared to one another
in a _____________________ fault, two pieces of land move horizontally.