HOMS: Science MCA Review ALL WORDS!
Terms in this set (200)
the rate at which velocity changes over time; an object accelerates if its speed, direction or both change
heritable characteristic that increases an organisms ability to survive and reproduce in an environment
A large body of air that shares such similar properties as pressure, temperature and humidity
The force applied on an area by the surrounding air molecules
group of drugs used to block the growth and reproduction of bacterial pathogens.
Partially melted (plastic) layer that lies just beneath the lithosphere
Earth's air; a relatively thin layer of gasses, solids and liquids that surround the planet.
tiny building blocks of matter; made up of protons, neutrons, and electrons
the number of protons plus the number of neutrons in the nucleus of an atom
the number of protons in an atom
a personal opinion that may influence scientific observation
is a field of applied biology that involves the use of living organisms and bioprocesses in engineering, technology, medicine and other fields.
is the uncontrolled growth of abnormal cells in the body.
causing zoo animals to have offspring.
process by which a cell divides into two new daughter cells
thin flexible barrier that surrounds all cells; regulates what enters and leaves the cell.
fundamental concepts of biology that states that all living things are composed of cells, that cells are the basic units of structure and function in living things and that new cells are produced from existing cells
strong supporting layer around the cell membrane in some cells.
basic unit of all forms of life.
expression in which symbols, formulas, and numbers are used to represent a chemical reaction
combination of chemical symbols usually used to represent a compound
a characteristic of matter that describes its ability to become a new type of matter through a chemical reaction. (example: burning turns wood into ash)
large irregular shaped structure that contains the green pigment chlorophyll food making site in green plants.
threadlike structures within the nucleus that contains genetic information that is passed from one generation to the next.
the tendency to break along smooth, flat surfaces
number that is placed in front of a symbol or a formula in a chemical equation that indicates how many atoms or molecules of this substance are involved in the reaction.
All the organisms living in a particular area or place
what something is made of
matter that is made of two or more elements and has properties different from each of these elements
Process of changing from a gas (water vapor) to a liquid
The transfer of heat energy from one object to another through direct contact between the objects (when you touch the stove it is "hot")
Conservation of matter
in a closed system the mass of the materials added must be the same as the mass of the products
variables that do not change in an experiment
processes that build up or create land at earth's surface
organism that relies on other organisms for energy and food supply; also called heterotrophs.
the variables are kept the same
Movement of a fluid due to unequal heating and cooling
The transfer of heat energy by the movement of fluids (gasses and liquids)
a solid in which the atoms are arranged in orderly, repeating patterns
plants that are grown for their produce.
fluid portion of the cell outside the nucleus.
any pieces of information acquired through observation or experimentation
organism that breaks down and obtains energy from dead organic matter.
removal of trees
the amount of matter in a given volume. It is measured by dividing the mass by the volume of the object.
the variable that is measured and recorded as a result of the action of the independent variable.
process in which desert like conditions are created where there had been none.
processes that break down and move the materials that make up earth's surface
process by which particles tend to move from an area where they are more concentrated to an area where they are less concentrated
an abnormal condition affecting the body of an organism
Boundary where two plates are moving away from one another
Variety or multiformity
an animal that can live with Humans.
a biological environment consisting of all the organisms living in a particular area, as well as all the nonliving
All of the types of electromagnetic radiation arranged according to their wavelengths (ex. Visible light, x-rays, microwaves, radio waves)
a pure substance that is made up of only one type of atom. (there are about 100 different elements or types of simple matter!)
in danger of becoming extinct
internal membrane system found in eukaryotic cells; place where lipid components of the cell membrane are assembled.
The ability to do work
the practical application of science and math to solve problems
Point on the surface, directly above the focus
A day that occurs when Earth's axis is tilted neither toward nor away from the sun
deals with morals and values
Process of changing from a liquid to a gas
species released into a place where they had never been before.
the independent(manipulated) variable is applied
term used to refer to a species that has died out and has no living members
In science, an observation that has been repeatedly confirmed.
The location, under the surface of the earth, where an earthquake occurs
a push or pull exerted on an object in order to change the motion of the object; force has both size and direction
Energy resources that formed from the buried remains of plants and animals that lived millions of years ago
the tendency to break along irregular or curved surfaces
a force that opposes motion between two surfaces that are in contact
The boundary between 2 air masses of different density, moisture or temperature
group of organisms that feeds on other materials and is unable to produce it's own food
Jupiter-like planets that are very large and made mostly of H and He
the state of matter in which both the volume and shape can change. The particles move very quickly.
a model of the solar system that places the earth at the center
global positioning system is a satellite-based navigation system consisting of a network of 24 orbiting satellites
a force of attraction between objects that is due to their masses
Natural heating that occurs when certain gases in Earth's atmosphere trap heat.
a mineral's resistance to being scratched
structures that are similar in different species of common ancestry
organism that gives nutrition to a parasite
A place in the middle of a plate where the mangle is very hot and the crust is very thin (volcanoes often can be found here.)
crossing of two genetically different but related species of an organism
All of the water on the earth's surface
a possible explanation or answer to a question.
a system of biological structures and processes within an organism that protects against disease by identifying and killing pathogens.
a biological term that describes a state of having sufficient biological defenses to avoid infection, disease, or other unwanted biological invasion.
breeding that involves crossing plants or animals that have the same or very similar sets of genes.
the tendency of an object to resist a change in motion
a logical explanation of an observation that is based on prior knowledge or experience
not alive, never was alive, never will be alive
Investigative question or testable idea
an idea or question that can be investigated through scientific questioning.
The energy of motion
friction between two moving objects
Law of Conservation of Energy
States that energy cannot be created or destroyed, but can be changed from one form to another
a rule that describes how things work (it is a theory that has been tested and is considered true)
the distance from one point to another. It is measured in meters using a ruler.
the state of matter in which the volume does not change, but the shape changes depending on the container it is in. The particles can slide past each other.
Earth's outer rigid layer that is about 100km (60 miles) thick
a substance applied to surfaces to reduce the friction between those two surfaces.
occurs when Earth's shadow falls on the moon
the shine of a mineral's surface (metallic and nonmetallic)
A device used to make work easier by changing the size or direction of the force needed to do the work
Melted rock below earth's surface
the amount of matter (or stuff) in an object. It is measured in grams using a balance.
anything that has mass and takes up space
The amount of work an object can do because of the object's kinetic and potential energies
shiny, conducts electricity, ductile, malleable
a chunk of rock or dust that burns up in Earth's atmosphere upon entry
The study of weather
small organism that can only be seen with a microscope
seasonal behavior resulting in the movement from one environment to another.
a naturally occurring, inorganic solid with definite structure and composition
rod shaped structure that is referred to as the powerhouse of a cell
part of eukaryotic cell division during which the cell nucleus divides
a combination of two or more substances that are not chemically combined. (they can be separated by their physical properties)
Moh's Hardness Scale
scale used to compare the hardness of various minerals ranging from hardest (10) to softest (1)
particle containing 2 or more atoms that are chemically combined (1 piece of a compound)
an object's change in position relative to a reference point
minerals made of only one element (ex. Iron and copper)
process by which organisms that are most suited to their environment survive and reproduce most successfully.
the combination of all of the forces acting on an object
the unit used to measure force (symbol= N)
does not have the properties of a metal
A resource that cannot be replaced or that are replaced much more slowly than they are used
the center of an an atom which contains the protons and neutrons in cells, structure that contains the cells genetic material
any use of the senses (smell, taste, touch, see) to gather information
Matter that does not allow light to pass through
a mineral that is the source of a valuable metal (ex. taconite/iron mining in Minnesota)
group of organs that work together to perform a specific function
group of tissues that work together to perform closely related functions
tiny cell structure.
an individual made up of organ systems
diffusion of water through a selectively permeable membrane
a result that is so far from average that it's validity is in question
The layer of the stratosphere responsible for absorbing most of the sun's harmful UV radiation
The super-continent that was made of all of the current day continents put together
an organism that lives off of a host for nutrition
Critique of one's writings/work by others with common interest
a change that affects one or more physical properties of a substance.
a characteristic of matter that can be observed or measured without changing the object. (examples: color, shape, volume, strength, flexibility, magnetism)
the study of matter (the stuff that everything is made of) and energy (the ability to do work). It is made of 2 branches of science: Physics and Chemistry
Theory that states that the earth's crust and upper mantle are made up of separate plates that move on the mantle
all the organisms that both belong to the same species and live in the same geographical area.
The energy an object has because of its position
Water falling from clouds
an organism that captures and feeds on another organism.
an organism that is captured and fed upon.
an organism that synthesizes energy-rich organic compounds from sunlight.
science method that investigates the why and how of decision making, not just what, where, when. focuses on smaller samples
science method thatrefers to a type of information based in quantities
The transfer of heat energy as electromagnetic waves through space (for example: visible light, microwaves...and energy from the sun)
Measure of the amount of water in the air compared to the amount needed for saturation at a specific temperature
A resource that can be replaced at the same rate or more quickly than it is used
describes an experiment that produces similar results each time
process by which living organisms take in oxygen and use it to produce energy.
movement around the sun; "orbital motion". Used to determine the "planetary year"
cell organelle consisting of RNA and protein found throughout the cytoplasm in a cell; the site of protein synthesis
movement (or spinning) around an axis. Used to determine the "planetary day"
the process of gathering knowledge (or learning) about the natural world.
the ways that scientists answer questions and solve problems
Instrument used to measure the strength of earthquakes
crossing of animals or plants that have desirable characteristics to produceoffspring with desirable characteristics
minerals containing silicon and oxygen
occurs when the moon's shadow falls on Earth
the state of matter in which the volume and shape of a substance stays the same (it is "fixed"). The particles are very close together
A day that occurs when Earth's axis is the most tilted toward or away from the sun
a mixture that is evenly mixed throughout
the distance traveled over a specific time (speed= distance ÷ time)
friction between two objects that prevents the object from moving
the color of the powdered mineral
how the parts of something are arranged
Boundary where one plate is pushed beneath another by a collision
number placed to the lower right of a chemical symbol to indicated the number of atoms of the element in the compound
a collection of interdependent parts enclosed within a defined boundary (can be closed=matter cannot enter or leave the system or open=matter can be exchanged between systems)
the use of scientific knowledge for practical use
a measure of how hot or cold something is. Also a measure of how fast the particles in the matter are moving.
the 4 earth-like planets; typically smaller and made of rock and metal
an explaination of observations or events that is based on knowledge gained from many observations and investigations
The daily rise and fall of sea level caused mostly by the moon's gravitational pull
group of similar cells that perform a particular function
collars used as a radio beacon to track animal migration for research.
A genetically determined characteristic or condition
Boundary where two plates are moving along side each other in opposite directions
Matter that allows light to pass through, but not clearly (you can see light through it
Matter that allows light to pass through clearly (you can see images through it)
a biological preparation that improves immunity to a particular disease
cell organelle that stores materials such as water, salts, proteins, and other materials.
factors that change in an experiment. You can only change 1 at a time in an experiment.
Something slightly different from another of the same type
the speed of an object in a particular direction
Particle made of proteins nucleic acids, and sometimes lipids that can replicate onlybyinfectingliving cells.
the amount of space that something occupies. It is measured in liters using a graduated cylinder.
The state of the atmosphere at a specific time and place
a measure of the gravitational force on an object
conservation of Earth's living things.
The ability to move an object using a force
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