BASICEC1

Question 1

When ______ was rubbed with some other materials, it became charged with a mysterious force. The charged ______ attracted things such as dried leaves and wood shavings.

Answer 1

amber, amber

Electricity Ch1 p.2

Question 2

Around the middle 1700s, Benjamin Franklin called the two types of electricity ______ and ______.

Answer 2

positive, negative

Electricity Ch1 p.2

Question 3

Scientists think that electricity is produced by very tiny particles called _______ and ______.

Answer 3

electrons, protons

Electricity Ch1 p.3

Question 4

Matter is anything that has ______ and ______.

Answer 4

weight, occupies space

Electricity Ch1 p.4

Question 5

______ are the basic materials that make up all matter.

Answer 5

Elements

Electricity Ch1 p.5

Question 6

Water is made from the elements hydrogen and oxygen. Table salt is made from sodium and chlorine. These are both examples of ______.

Answer 6

compounds

Electricity Ch1 p.6

Question 7

A molecule of water is two atoms of ______ and one atom of ______.

Answer 7

hydrogen, oxygen (H2O)

Electricity Ch1 p.8

Question 8

An atom contains three subatomic particles…

Answer 8

electrons, protons, and neutrons

Electricity Ch1 p.9

Question 9

If the atom of a(n) ______ is broke down any further, it would no longer exist in the particles that remain.

Answer 9

element

Electricity Ch1 p.9

Question 10

The number of ______ in the nucleus determines how one atom of an element differs from another.

Answer 10

protons

Electricity Ch1 p.10

Question 11

The atomic number of an element is the total number of which particles in the nucleus?

Answer 11

protons

Electricity Ch1 p.10

Question 12

The nucleus of an atom contains both ______ and ______.

Answer 12

protons, neutrons

Electricity Ch1 p.11

Question 13

The proton is ______ the diameter of an electron, but it has almost ______ the mass of an electron. The proton is almost ______ heavier than the electron.

Answer 13

one-third, 1840 times, 1840 times

Electricity Ch1 p.11

Question 14

The proton has a ______ electrical charge.

Answer 14

positive

Electricity Ch1 p.11

Question 15

A positive ion contains ______ protons than electrons. A negative ion contains ______ protons than electrons.

Answer 15

more, less

Electricity Ch1 p.15

Question 16

Charges on atoms are called…

Answer 16

ions

Electricity Ch1 p.15

Question 17

______ charges repel. ______ charges attract.

Answer 17

like, unlike

Electricity Ch1 p.20

Question 18

The atoms of all known elements can have up to ______ shells.

Answer 18

seven

Electricity Ch1 p.24

Question 19

How many shells does hydrogen have?

Answer 19

1

Electricity Ch1 p.24

Question 20

______ is the lightest element with only one electrons.

Answer 20

Hydrogen

Electricity Ch1 p.25

Question 21

How many valence electrons does copper have?

Answer 21

1

Electricity Ch1 p.25

Question 22

The second shell cannot hold more than ______ electrons.

Answer 22

eight

Electricity Ch1 p.26

Question 23

The outer shell of an atom, also know as the ______, will have no more than ______ electrons.

Answer 23

valence shell, 8 (valence) electrons

Electricity Ch1 p.27

Question 24

Electricity is produced when __________ are _________ from their atoms.

Answer 24

electrons are freed

Electricity Ch1 p.29

Question 25

Atoms with only one valence electron make good ______.

Answer 25

conductors Electricity Ch1 p.30

Question 26

______ are materials from which electrons are very difficult to free.

Answer 26

insulators Electricity Ch1 p.31

Question 27

Rubbing friction is supplied to the surface atoms of insulators such as glass and rubber, which can produce charges of static electricity. This is known as the ______.

Answer 27

triboelectric effect Electricity Ch1 p.41

Question 28

Electricity can be produced by ______ and ______.

Answer 28

light, magnetism Electricity Ch1 p.40

Question 29

A battery or ______ works on the principles of electrochemistry where chemicals(sulfuric acid and water) combine with certain metals to cause a chemical action that produces electric charges.

Answer 29

basic wet cell Electricity Ch1 p.42

Question 30

______ is the name given to the effect of pressure in causing electric charges.

Answer 30

Piezoelectricity Electricity Ch1 p.43

Question 31

______ is the method where heat is applied to the junction of two metals to provide more energy and more electrons to be freed.

Answer 31

thermoelectricity Electricity Ch1 p.44

Question 32

When a number of thermocouples are joined together, a ______ is made.

Answer 32

thermopile Electricity Ch1 p.44

Question 33

_______ is a form of energy made of small particles called protons.

Answer 33

Light Electricity Ch1 p.45

Question 34

In order to produce an electric current, the free electrons in the copper wire must be made to move ______.

Answer 34

in the same direction Electricity Ch1 p.49

Question 35

The speed of light is ______ miles per second.

Answer 35

186,000 Electricity Ch1 p.51

Question 36

An electron leaves the ______ side of the battery for each electron that enters the ______ side.

Answer 36

negative, positive Electricity Ch1 p.54

Question 37

When a conducting wire is put directly across the terminals of a battery or generator, a ______ is produced.

Answer 37

short circuit Electricity Ch1 p.57

Question 38

Electron current flows from ______ potential to ______ potential, or between any difference in potential.

Answer 38

low, high Electricity Ch1 p.58

Question 39

The electrical charge that an object gets is determined by the ______ that the object lost or gained.

Answer 39

number of electrons Electricity Ch1 p.59

Question 40

Light can be produced by electricity without much heat, by such methods as...

Answer 40

fluorescence, phosphorescence, and electroluminescence Electricity Ch1 p.66

Question 41

Any conductor that carries an electric current will act like a ______.

Answer 41

magnet Electricity Ch1 p.67

Question 42

A magnet can be demagnetized by...

Answer 42

being struck hard, heat energy, and rapidly reversing the magnetic field. Electricity Ch1 p.74

Question 43

A compass needle points to the ______.

Answer 43

north magnetic pole Electricity Ch1 p.77

Question 44

The magnetic field of a magnet is made up of lines of force that go from...

Answer 44

the North Pole of the magnet to the South Pole. | Electricity Ch1 p.80

Question 45

A close wound solenoid will create a ______ magnetic field.

Answer 45

stronger Electricity Ch1 p.88

Question 46

A helically wound coil that is made to produce a strong magnetic field is called a _____________ .

Answer 46

Solenoid Electricity Ch1 p.88

Question 47

A ______ has an extra set of contacts to keep current flowing through the relay even after the main switch is released.

Answer 47

holding relay Electricity Ch1 p.95

Question 48

A ______ operates similar to a relay except that the contacts are especially arranged so that the electromagnetic coil cannot stay energized continuously.

Answer 48

buzzer Electricity Ch1 p.96

Question 49

What does a commutator do to electric current so that the magnetic field repels in the same direction?

Answer 49

reverses the current Electricity Ch1 p.98

Question 50

The ______ keeps current flowing out of the generator in the same direction at all times.

Answer 50

commutator Electricity Ch1 p.101

Question 51

If a commutator is not used, the current coming out of the generator will...

Answer 51

change direction as the loop turns creating an alternating current. Electricity Ch1 p.101