Matter And Change

Question 1

Endothermic change

Answer 1

A chemical reaction or process in which a greater amount of energy is required to break the existing bonds in the reactants than is released when the new bonds form in the product molecules.

Question 2

Mass

Answer 2

A measure that reflects the amount of matter

Question 3

Matter

Answer 3

Anything that has mass and takes up space (liquid, solid, gas)

Question 4

Atom

Answer 4

The smallest particle of an element that retains all the properties of that element

Question 5

Element

Answer 5

A pure substance that can not be broken down into simpler substances by physical or chemical means

Question 6

Compound

Answer 6

A chemical combination of two or more different elements; can be broken down into simpler substances by chemical means and has properties different from those of its component elements

Question 7

Physical property

Answer 7

A characteristic of matter that can be observed or measured without changing the sample’s composition (density, color, taste, melting point, hardness)

Question 8

Chemical property

Answer 8

The ability or inability of a substance to combine with or change into one or more new substances.

Question 9

Homogeneous mixture

Answer 9

One that has uniformed composition throughout and always has a single phase; also called a solution

Question 10

Heterogeneous mixture

Answer 10

One that does not have a uniform composition and in which the individual substances remain distinct

Question 11

Exothermic change

Answer 11

A chemical reaction or process in which more energy is released than is required to break the bonds in the initial reactants