Chapter 1

Question 1

anything that occupied space and has a weight

Answer 1

matter

Question 2

In what state is matter found?

Answer 2

solid, liquid, gas

Question 3

A substance which cannot be reduced to a simpler substance by a chemical means?

Answer 3

element

Question 4

A substance consisting of two or more elements

Answer 4

compound

Question 5

Difference between a compound and mixture

Answer 5

compound = chemical combination of elements that cannot be separated by physical means; mixture = physical combination or elements or compounds taht are not combined

Question 6

Chemical combination of two or more atoms

Answer 6

molecule

Question 7

Subatomic particles and their charges?

Answer 7

electrons (-), protons (+), neutrons (0)

Question 8

energy in motion

Answer 8

kinetic energy

Question 9

How is invisible light changed to visible light in a fluorescent light

Answer 9

Invisible light protons (ultraviolet) bombard the phosphor atom in the light tube. The phosphor atoms emit visible light protons

Question 10

What determines the valence of an atom?

Answer 10

The number of electrons in the outer shell

Question 11

What do you call an atom with more or less than its normal number of electrons?

Answer 11

Ion

Question 12

What determines whether a substance is a conductor or an insulator?

Answer 12

number of valence electrons

Question 13

How is a negative charge created in a neutral body

Answer 13

Through accumulation of electrons

Question 14

How are static charges created?

Answer 14

by friction

Question 15

What is the electrical charge of an atom which contains 8 protons and 11 electrons

Answer 15

-3

Question 16

What is the relationship between charged bodies?

Answer 16

like charges repel and unlike charges attract with a force directly proportional to the product of their charges and inversely proportional to the square of the distance between them (kq1q2/d^2)

Question 17

What is an electrostatic field?

Answer 17

Space between and around charged bodies

Question 18

What direction are electrostatic lines of forces drawn?

Answer 18

positive to negative

Question 19

What are some examples of electrical equipment which use magnetism?

Answer 19

motors, generators, speakers, computers, televisions, tape recorders and many others

Question 20

What do you cal materials that are attracted by magnets and have the ability to become magnetized?

Answer 20

magnetic materials

Question 21

What characteristics do all ferromagnetic materials have in common?

Answer 21

They are easy to magnetize

Question 22

What type of magnetic materials should be used to make a temporary magnet?

Answer 22

materials that exhibit low reluctance and high permeability, such as iron or soft steel

Question 23

What do you call the ability of a material to retain magnetism?

Answer 23

retentivity

Question 24

How does the law of magnetic poles relate to the law of electric charges?

Answer 24

They are very similar. Like charges repel, inlike charges attract. Like poles repel, unlike poles attract

Question 25

A compass is located at the geographic North pole. In which direction would its needle point?

Answer 25

To the magnetic north pole