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Science Chemistry

Term/questionDefinition
What does every fire need? Every fire needs the same three components: fuel, oxygen gas, and heat.
What new substance does fire produce? And how is it formed? invisible carbon dioxide gas. It is formed when oxygen from the air and carbon in the wood chemically combine.
Cohesion Cohesion is a property that describes matter sticking itself which is a characteristic of water
Adhesion When water sticks to something else
Physical property A physical property describes a characteristic of a substance that can be observed or measured without changing its chemical composition
example of physical property Melting point
when water freezes it: expands
when water vaporizes it: expands
when water melts it: shrinks
Lustre Shiny or dull
Colour How it looks
Clarity How transparent (see through) it is
Example of lustre Gold has lustre (shiny) concrete is dull
Conductivity Conductivity is the ability of a substance to conduct electricity or heat. A substance that conducts electricity or heat is called a conductor. A substance with little or no conductivity is an insulator.
Example of conductivity Copper is a very good conductor of electricity Styrofoam and glass are insulators.
Density Density is the amount of mass in a given volume of a substance.
Example of density The density of pure water is 1 g/mL.
Ductility Any solid that can be stretched into a long wire
example of a ductile material Copper
Hardness Hardness is a substance’s ability to resist being scratched. Hardness is usually measured on the Mohs hardness scale from 1 to 10.
Example of hardness Diamond is the hardest material (10)
malleability the ability to be pounded or rolled into sheets without breaking
example of malleability Aluminum foil is an example of a malleable substance.
Viscosity Viscosity is the resistance of a fluid to flow.
example of viscosity syrup has a high viscosity whereas water has a low viscosity
Chemical property A chemical property describes the ability of a substance to change into a new substance or substances.
Chemical change A chemical change always results in the formation of a new substance or substances.
example of chemical change when zinc metal and hydrochloric acid are mixed, they undergo a chemical change that produces two new substances: hydrogen gas and a compound called zinc chloride.
Chemical reaction A chemical reaction is a process in which a chemical change occurs.
when can chemical properties be observed Chemical properties can be observed only when a chemical change occurs.
Alloy Two or more metals combined to make one metal
Atom The basic building block of matter everything is made up of.
Chemistry the study of the chemicals that make up matter
Compound a substance created when 2 or more chemical elements fuse by chemical bonding
Element pure substance only made up of one atom
heterogenous mixture a mixture in which the composition is not uniform throughout meaning its components are not evenly distributed and are often individually distinguishable
homogenous mixture all the particles are uniform throughout
matter anything that has mass and takes up space
Mechanical mixture a mixture in which two or more substances are combined but remain visually distinct and are not evenly distributed throughout the mixture
mixture a substance made up of two or more components that are not chemically bonded and can be seperated by physical means
pure substance matter with uniform composition and consistant properties throughout and contains only one kind of particle
solution a homogeneous mixture where one or more substances calls solutes dissolve into a substance called the solvent
boiling point tempature at which a liquid turns to a gas (100 degrees celcuis)
brittleness the propertry of a material that tend to fracture or break with little to no plastic deformation when subject to stress
form the shape or appearance of the substance
melting point the tempature at which a substance changes shape from a solid to a liquid (0 degrees celcieus)
odour how something smells
solubility the ability for a substance (solute) to dissolve into another substance (solvent)
state of matter how particles are arranged whether something is a liquid solid or gas based on how far the particles are and how much energy they have
taste how something tastes (sweet salty etc)
texture the crystallographic orientation of materials grains or crystals
Created by: Jessica_Elises
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