Chapter 2/Lesson 2 (New Book)

Question 1

What are the four elements?

Answer 1

Air, Fire, water and earth.

Question 2

Empedocles

Answer 2

Greek philosopher. Believed that matter was composed of four elements.

Question 3

What is an Element?

Answer 3

A substance that not be broken down into any other element by chemical or physical means.

Question 4

Periodic Table

Answer 4

100+ element, each with a two letter abbreviation.

Question 5

Particle Theory of Matter

Answer 5

A theory that all matter is atoms.

Question 6

Nucleus

Answer 6

A positively charges center of an atom.

Question 7

Chemical Bond

Answer 7

A force of attraction between two atoms.

Question 8

Molecule

Answer 8

a group of two or more atoms held together by chemical bonds.

Question 9

Water Molecule

Answer 9

Grouping of one oxygen atom and two hydrogen atoms.

Question 10

What is a compound?

Answer 10

a substance made up two more elements that chemically bonded in a set ratio.

Question 11

Chemical Formula

Answer 11

a method of representing the elements in a compound that the ratio of atoms.

Question 12

Mixtures

Answer 12

Two or more substances that are not chemically bonded.

Question 13

Heterogeneous Mixture

Answer 13

A mixture where the different parts are visible and can separated. Example: a salad.

Question 14

Homogenous Mixture

Answer 14

A mixture where the different parts are not visible and hard to separate. Example: air

Question 15

How to separate mixtures?

Answer 15

Distillation, Evaporation, Magnetic Attraction and Filtration.