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Review of the science vocabulary words for the Mid-term


explanation of things or events from many observations

scientific law

a rule that describes a pattern in nature

earth science

the study of Earth's systems and nonliving things


a record or description of an occurence or pattern in nature


a reasonable guess that can be tested and is based on what is observed

dependent variable

factor that may change as a result of changes to the independent variable


information gathered during an investigation


element that has luster, is malleable, ductile, and a good conductor of heat and electricity


element that is usually a gas or brittle solid at room temperature and is a poor conductor of heat and electricity


element that shares some properties with both metals and nonmetals


element that does not conduct electricity as well as a metal but conducts it better than a nonmetal

noble gas

elements in group 18 of the periodic table


the second series of intertranistion elements which goes from thorium to lawrencium

chemical bond

force that holds two atoms together


pure substance that contains two or more elements


neutral particle formed when atoms share electrons

chemical formula

combination of chemical symbols and numbers that indicates which elements and how many atoms of each element are present in a molecule


a small particle that makes up most types of matter


matter with a definite shape and volume


matter with a definite volume but no definite shape that can flow from one place to another


the change from a liquid to a gas


change of matter from a gas to a liquid state


change of matter from a liquid to a gas state starting with the top layer of water


mass of an object divided by its volume

Pascal's Principle

states that when a force is applied to a confined fluid, an increase in pressure is transmitted equally to all parts of the fluid.


systematic way of learning more about the natural world that provides possible explanations to questions and involves using a collection of skills


a set of objects or parts that form a whole

physical science

study of matter, which is anything that takes up space and has mass, and the study of energy, which is the ability to cause change


factor that can be changed in an experiment


variable that is not changed in an experiment


an educated guess as to what is going to happen based on observation

critical thinking

involves using knowledge and thinking skills to evaluate evidence and explanations

transition element

elements in groups 3-12 in the periodic table, all of which are metals


family of elements in the perioidic table that have similiar physical or chemical properties

atomic number

the number of protons in the nucleus of a given element

alkali metal

elements in group 1 of the periodic table


elements in group 17 of the periodic table


the first series of inner transition elements which goes from cerium to lutetium

energy level

the different areas for an electron in an atom


atom that is no longer neutral because it has gained or lost an electron

ionic bond

attraction that holds oppositely charged ions close together

metallic bond

bond formed when metal atoms share their pooled electrons


anything that takes up space and has mass


a liquid's resistance to flow


the ability to do work or cause change

thermal energy

the sum of the kinetic and potential energy of the particles in a material


a measure of the average value of the kinetic evergy of the particles in a material


liquid changes to gas by forming bubbles in the liquid that rise to the surface

bouyant force

upward force exerted on an object immersed in a fluid

scientific theory

a possible explanation for repeatedly observed patterns in nature supported by observations and results from many investigations

life science

study of living systems and how they interact


use of science to help people in some way


to draw a conclusion based on observation

independent variable

factor that is intentionally varied by the experimenter

controlled experiment

involves changing one factor and observing its effect on one thing while keeping all other things constant


a substance that cannot be broken down into simpler substances


horizontal row of elements in the periodic table whose properties change gradually and predictably

representative element

elements in group 1 and 2 and 13-18 in the periodic table that include metals, metalloids, and nonmetals

mass number

the sum of neutrons and protrons in the nucleus of an atom

alkaline earth metal

elements in Group 2 of the periodic table


substance that can make something happen faster but is not changed itself

chemical change

change in which the identity of a substance changes and forms a new substance or substances

electron cloud

area where negatively charged electrons, arranged in energy levels, travel around an atom's nucleas

electron dot diagram

chemical symbol for an element, surrounded by as many dots as there are electrons in its outer energy level

covalent bond

chemical bond formed when atoms share electrons

polar bond

bond resulting from the unequal sharing of electrons

surface tension

the uneven forces acting on the particles on the surface of a liquid


matter that does not have a definate shape or volume; has particles that move at high speeds in all directions


movement of thermal energy from a substance at a higher tempurature to a substance at a lower temperature


change of matter from a solid state to a liquid state


change of matter from a liquid state to a solid state


a push or a pull that one object exerts on another


force exerted on a surface divided by the total area over which the force is exerted

Archimedes' principle

states that the bouyant force on an object is equal to the weight of the fluid displaced by the object

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