1st test

Question 1

the study of topics like the air around you, radioactivity, distant galaxies, the structure of the earth, its place in the universe, and many others like them.

Answer 1

Physical Science

Question 2

the smallest particle of an element that has the chemical properties of that element.

Answer 2

Atom

Question 3

a characteristic of a substance that describes a type of chemical change it can undergo.

Answer 3

Chemical property

Question 4

a change in which two or more substances combine to form a new substance or substances.

Answer 4

Chemical reaction

Question 5

a substance made up of atoms of two or more elements.

Answer 5

Compound

Question 6

a substance that is composed of one type of atom.

Answer 6

Element

Question 7

a combination of substances in which each substance retains its own chemical and physical properties.

Answer 7

Mixture

Question 8

the smallest unit of a compound that retains the chemical properties of the compound.

Answer 8

Molecule

Question 9

a characteristic of a substance that can be observed, such as color, taste, texture, and density.

Answer 9

Physical property

Question 10

in a chemical reaction, a substance that is formed as a result of the reaction.

Answer 10

Product

Question 11

the substances that combine in a chemical reaction.

Answer 11

Reactants

Question 12

If a statue has copper on it and is exposed to weather, a process similar to the one that you observed turns the copper atoms in the statue into…

Answer 12

…copper hydroxycarbonate.

Question 13

small, equal parts used in measuring.

Answer 13

Units

Question 14

the system of standard units scientists use in all of their measurements because it is used by everyone.

Answer 14

metric system

Question 15

Mass measures…

Answer 15

…how much matter exists in an object.

Question 16

Weight measures…

Answer 16

…how hard a planet’s gravity pulls on that object.

Question 17

factor-label method

Answer 17

We will first write the measurement we know in fraction form by putting it over one. We will then find the relationship between the unit we have and the unit to which we want to convert. Next, we will use that relationship to make a fraction that, when multiplied by our first fraction, cancels out the unit we have and replaces it with the unit we want to have.

Question 18

The quantity of a substance within a certain volume of space.

Answer 18

Concentration

Question 19

milli

Answer 19

0.001

Question 20

centi

Answer 20

0.01

Question 21

kilo

Answer 21

1,000

Question 22

deci

Answer 22

0.1

Question 23

deca

Answer 23

10

Question 24

hecto

Answer 24

100