Unit 2 Vocabulary Quiz: Chemical Reactions Honors

carbon

• two or more atoms bonded together by valence electrons

• the one element that is found in all organic compounds (living things)

• the mass of all reactants must equal the mass of all products. Matter is neither created nor destroyed.

• a substance that increases the rate of a chemical reaction

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

subscript

• A symbolic representation of a chemical reaction in which both sides of the equation contain equal numbers of atoms of each element. The mass must be balanced on both sides.

• Affects size, shape, state of matter, or color of a substance, but does not turn it into a new substance.

• The one element that is found in all organic compounds (living things).

• A number written below and to the right of a chemical symbol that shows the number of atoms.

Tags

NGSS.MS-PS1-1

substance

• An element or compound that can only be separated or combined to make new substances by means of a chemical reaction.

• One or more substances are changed into entirely new substances because their atoms are rearranged.

• A solid that is created by the reaction of two liquids.

• A pure substance made entirely of one type of atom.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

chemical equation

• A solid that is created by the reaction of two liquids.

• Substances that are produced during a chemical reaction.

• Chemical formulas and symbols written to represent an entire reaction.

• The process by which one or more substances get changed to produce one or more different substances.

Tags

NGSS.MS-PS1-5

element

• Affects size, shape, state of matter, or color of a substance, but does not turn it into a new substance.

• Describes a chemical reaction that produces heat energy.

• Indication that an event has occurred.

• A pure substance made entirely of one type of atom.

Tags

NGSS.MS-PS1-1

exothermic

• A natural physical system that does not allow transfer of matter in or out of the system.

• A pure substance made of two or more types of atoms bonded together by valence electrons.

• Describes a chemical reaction that produces heat energy.

• The smallest unit of an element.

Tags

NGSS.MS-PS1-4

closed system

• A natural physical system that does not allow transfer of matter in or out of the system.

• An element or compound that can only be separated or combined to make new substances by means of a chemical reaction.

• A pure substance made entirely of one type of atom.

• Two or more atoms bonded together by valence electrons.

Tags

NGSS.MS-PS1-5

physical change

• A natural physical system that does not allow transfer of matter in or out of the system.

• The one element that is found in all organic compounds (living things).

• Affects size, shape, state of matter, or color of a substance, but does not turn it into a new substance.

• Describes a chemical reaction that produces heat energy.

Tags

NGSS.MS-PS1-4

endothermic

• A pure substance made of two or more types of atoms bonded together by valence electrons.

• Describes a chemical reaction that absorbs heat energy.

• Describes a chemical reaction that produces heat energy.

• Chemical formulas and symbols written to represent an entire reaction.

Tags

NGSS.MS-PS1-4

precipitate

• A solid that is created by the reaction of two liquids.

• Substances that are produced during a chemical reaction.

• A symbolic representation of a chemical reaction in which both sides of the equation contain equal numbers of atoms of each element. The mass must be balanced on both sides.

• A number placed in front of a chemical symbol or formula in order to balance the equation.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5