Biology chapter 6-2 Flashcards

5169245621	signs of physical changes	water evaporation, ice melting, sugar dissolving in water, which are all changes that can be reversed	0
5169248810	signs of a chemical reaction	color change, production of heat or light, formation of a new solid, liquid or gas	1
5169454676	atoms	building blocks of matter	2
5169458552	proton + neutron (neutral) electron -	the three particles of an atom and their charges	3
5169467696	element	a pure substance made of one type of atom that can not be broken down by physical or chemical means	4
5169471742	compound	a pure substance formed of two or more elements	5
5169478696	electrons	what atoms share when they form a covalent bond	6
5169483319	ionic bond	a bond that is formed when one atom is positively charged and another atom is negatively charged.	7
5169493261	Van Der Waals forces	weak attractive forces between separate molecules	8
5169501796	more neutrons	How one isotope of Carbon (C12) differs from another isotope of Carbon (C14)	9
5169514217	Hydrogen flouride or Hydrogen oxide H2O	give an example of a compound tat forms a covalent bond.	10
5169386722	exothermic reaction	A chemical reaction where energy is released is called an _____________________ ____________________	11
5169389312	endothermic reaction	a reaction where energy is absorbed	12
5169402771	activation energy	what an enzyme lowers in a biological reaction	13
5169406447	catalyst	it speeds up the process in a chemical reaction	14
5169410168	enzyme	a biological catalyst- speeds up biological reactions	15
5169416135	NaCl sodium chloride	a substance with at least one ionic bond	16
5169429449	chemical reaction	a process by which atoms or groups of atoms are reorganized into different substances	17
5169436753	activation energy	the extra energy needed to get a reaction started	18
5169446493	iron oxide	a product made from a nail rusting	19
5169448137	oxygen	a reactant when paper burns	20