Science Midterm
Terms
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- anion
- a negitivaley charged ion
- flame test
- Testing chemicals by burning a compound to look at its flame color. Certain compounds and elements burn with distinctive colors.
- independent variable
- variable that stands alone
- suspension
- one substance refusing to mix with another
- solvent
- your begining product
- condensation
- is the phase change when a substance turnes from liquid to a gas
- Oxygen
- a gas that makes a flame faster and brighter
- melting point
- The temperature at which a solid is converted to a liquid
- isotope
- one of two or more atoms with the same atomic number but with different numbers of neutrons
- molecule
- A bonded collection of two or more atoms of the same element or different elements
- displacement
- a reaction in which an elementary substance displaces and sets free a constituent element from a compound
- decomposition
- separation of a substance into two or more substances that may differ from each other and from the original substance
- density
- A measure of the amount of mass per unit of volume
- carbon dioxide
- a gas that will make a flame go out
- solid
- of definite shape and volume
- hypothesis
- an educated guess
- diluted
- a mixture with little concentration.
- liquid
- a substance in the fluid state of matter having no fixed shape but a fixed volume
- types of chemicial reactions
- displacement, decomposition, combustion, thermic
- sublimation
- the phase change when a substance changes from a solid to gas skipping liquid state
- solute
- a substance added to a chemical reaction to create a change in the solution
- y axis
- vertical line on a graph
- purpose statement
- determines purpose of expiriment
- cation
- a positevely charged ion
- qualitative data
- data you collect usuing your senses
- effervesence
- the gas given off during a chemical reaction
- chemical gases
- oxygen, hydrogen, carbon dioxiede, aceteylne
- vaporization
- is the phase change as a liquidturns to a gas
- plasma
- matter at high enegery
- endothermic
- occurring or formed with absorption of heat
- exothermic
- occurring or formed with evolution of heat
- ion
- a particle that is electrically charged (positive or negative)
- hydrogen
- a gas that will whistle in the presence of a flame
- concentrated
- a strong solution with more substance than water
- combustion
- Occurs when there is a rapid exothermic combination of substances with oxygen. Fuel+o+Heat.
- boiling point
- The temperature at which a liquid is converted to a gas
- x axis
- horizontal line on a graph
- noble gas
- when the outer most electron shells are filled
- deposition
- is a the phase change as a substance changes from a gas to solid without passing through a liquid state
- solution
- your final product
- chemical reaction
- a process in which one or more substances are changed into others
- aceteylne
- will burn in the presence of a flame
- quantitative data
- data you collect using numbers
- compound
- a substance formed by chemical union of two or more elements