Science Processes
a possible explanation to a question based on what is known and observed. The explanation MUST be testable.
What is hypothesis?
a characteristic of matter such as size, shape, or state that can be observed and measured
What is a physical property?
the positively charged particles located in the atom’s nucleus, (have mass)
What are protons?
elements that are malleable, ductile, good conductors of electricity, and generally have a shiny or metallic luster
What are metals?
A number or symbol multiplied with a variable (in a chemical equation)
What is coefficient?
the experimental variable that is changed
What is independent variable?
the properties of a substance that can be used to identify it and that describes how the substance reacts with other substances resulting in a new substance
What is a chemical property?
the neutral (no charge) particles located in the atom’s nucleus, (have mass)
What are neutrons?
element that is usually a gas or a brittle solid at room temperature and is a poor conductor of heat and electricity
What are nonmetals?
a number after and slightly below an element in a chemical formula
What is a subscript?
the experimental variable that changes as a result of the independent variable
What is dependent variable?
a physical property that describes the mass per unit volume of a substance
What is density?
the negatively charged particles orbiting the nucleus of the atom making up the electron cloud (almost no mass)
What are electrons?
elements that share some properties with both metals and nonmetals
What are metalloids?
shorthand form of writing what reactants are used and what products are formed in a chemical reaction
What is a chemical equation?
a variable in an experiment that does not change
What is constant?
the measure of how much substance dissolves in a given amount of another substance
What is solubility?
a substance produced when elements combine and whose properties are different from each of the elements in it
What is a compound?
an electron in the outer shell of an atom which can combine with other atoms to form molecules
What are valance electrons?
states that the mass of the products of a chemical change is always the same as the mass of the reactants
What is the Law of Conservation?
the part of an experiment where no variables are changed
What is control?
a solid that forms from a chemical reaction that takes place in a solution
What is precipitate?
a combination of compounds and elements that has not formed a new substance and whose proportions can be changed without changing the mixture’s identity
What is a mixture?
family of elements in the periodic table that have similar physical and/or chemical properties
What is a group?
chemical reaction in which thermal energy is absorbed
What is endothermic?