7th 2.1 Vocab - LaDonna Aldrich-Means | Library

2

activation energy: the minimum amount of energy required to initiate a _______ ; written as Ea and measured in _______ 

2

The letter "a" represents _______ and "b" represents _______. 

1

chemical bond: the _______  that hold atoms together

3

The three main types of chemical bonds exist are

2

Select all of the scenarios that describe a chemical change:

3

chemical property: a characteristic of a substance that is measurable or _______  during a chemical reaction; includes _______ , heat of combustion, _______ , etc.

1

law of conservation of mass: a fundamental principle of science stating that mass cannot be _______  in a closed system through ordinary chemical or physical means

3

Select all of the scenarios that describe a physical change

2

physical property: a characteristic that can be _______  (intensive) or _______  (extensive) that is used to describe matter and can be observed or measured without changing its composition

4

Sort the physical properties as intensive or extensive.

density
mass
length
color
odor
texture
melting point
volume

Intensive Properties
Extensive Properties

2

precipitate: solid _______  that have been separated from a _______ 

3

Select the indicators of a chemical change:

2

product: the _______  that are formed during a _______  reaction

2

reactant: the _______  present before a _______  occurs

3

In the diagram above, "a" represents a _______, "b" represents a _______, and "c" represents the _______.   

3

solute: a substance that has the ability to be _______  by a _______  to create a _______ 

1

Sea water is salty because it has dissolved salts. Salt is the _______  in sea water.

2

When water and sugar are mixed together, the sugar dissolves into the water. The _______  in this case would be the solvent, and the _______  (the substance being dissolved) would be the solute.

1

solution: a _______  in which a solid and a liquid or two liquids are mixed so evenly, that it is not possible to see the separate particles

2

The ocean is a solution of _______  and other _______  in water.

1

solvent: the substance that _______  another substance

1

_______  is the universal solvent.

1

Sugar dissolves when mixed with water. _______  is the solvent.