D.C. Current

Question 0

What is the name for the Fundamental Substances found in nature?

Answer 0

Elements

Question 1

Tiny particles that make up all matter

Answer 1

Atoms

Question 2

How many Elements are found in Nature?

Answer 2

92

Question 3

The part of an atom that gives an element it’s identity is called

Answer 3

The Nucleus

Question 4

The Nucleus of an atom is made up of

Answer 4

Protons and Neutrons

Question 5

Protons and Neutrons have just about _______ mass, but the proton has an _______ while the neutron does not.

Answer 5

the same

electric charge

Question 6

The simplest element, _______, has a nucleus made up of only one _______; there are usually no ______. This is the most common _______ in the Universe.

Answer 6

Hydrogen

Proton

Neutrons

Element

Question 7

The second most abundant element is ______. Usually this atom has a nucleus with 2 protons and 2 neutrons.

Answer 7

Helium

Question 8

______ is changed into _______ inside the sun and in the process ______ is given off. This makes the sun shine. The process, called ______, is also responsible for the terrific explosive force of a _______ bomb.

Answer 8

Hydrogen

Helium

Energy

Fusion

Hydrogen

Question 9

The number of ______ in a elements nucleus makes up the ______ number and gives that element it’s identity.

Answer 9

Protons

Atomic Number

Question 10

Elements with high Atomic Numbers, like lead, are much ______ than elements with a low Atomic Number like Carbon.

Answer 10

Denser

Question 11

Surrounding the nucleus of an atom are particles having opposite electric charge from protons. These are the ________.

Answer 11

Electrons

Question 12

An _______ has exactly the same charge quantity as a proton, but with opposite polarity.

Answer 12

Electron

Question 13

Electrons are in ‘spheres’ called _______.

Answer 13

Shells

Question 14

The farther away from the nucleus the electron is the more ________ it has.

Answer 14

Energy

Question 15

Electricity results from the movement of _______ in a material.

Answer 15

Electrons

Question 16

Generally the number of electrons I’m an atom is the _______ as the number of protons.

Answer 16

The same

Question 17

When negative charges of an electron cancel out the positive charges of a proton the atom is said to be ________.

Answer 17

Neutral

Question 18

Under some conditions there can be a shortage or excess of ________ in an atom causing an imbalance.

Answer 18

Electrons

Question 19

Electrons can be knocked or thrown off of their atoms by high levels of _______ energy, extreme ________, or the presence of an ________ field.

Answer 19

Radiant

Heat

Electric

Question 20

A shortage of electrons results in a ______ charge; an excess of electrons results in a _______ charge.

Answer 20

Positive

Negative

Question 21

A charged atom is called a _______.

Answer 21

Ion

Question 22

When a substance contains many ions the material is said to be _______.

Answer 22

Ionized

Question 23

Abnormal numbers of neutrons in an atom result in various __________ in a element.

Answer 23

Isotopes

Question 24

An element might be both an ______ and _______ different from the usual isotope.

Answer 24

Ion Isotope

Question 25

Different elements can join together to share _________. When this happens, the result is a __________.

Answer 25

Electrons Chemical Compund

Question 26

One of the most common chemical compounds is _______.

Answer 26

Water (H2O)

Question 27

When atoms of elements join together to form a compound the resulting particles are _________.

Answer 27

Molecules

Question 28

The natural form of an element is also known as it's __________.

Answer 28

Molecules

Question 29

All matter whether it is solid, liquid, or gas, is made up of _________.

Answer 29

Molecules

Question 30

The __________ the temperature the more rapidly molecules move around.

Answer 30

Hotter

Question 31

An electrical _________ is a substance in which the electrons are mobile.

Answer 31

Conductor

Question 32

The best conductor at room temperature is pure elemental ________.

Answer 32

Silver

Question 33

In most electrical circuits __________ or ___________ wire is used.

Answer 33

Copper Aluminum

Question 34

Substances that prevent electrical current from flowing, except possibly in very small amounts are called _________.

Answer 34

Insulators

Question 35

__________ make the best insulators.

Answer 35

Gases

Question 36

An insulating material is sometimes called a _________.

Answer 36

Dielectric

Question 37

Substances that conduct electricity but not very well, like carbon, are called _________.

Answer 37

Resistors

Question 38

Electrical resistance is measured in units called __________.

Answer 38

Ohms

Question 39

Resistance converts electrical energy to ________.

Answer 39

Heat

Question 40

In a __________, electrons flow, but not as well as they do in a conductors but not the same as resistors.

Answer 40

Semiconductors

Question 41

A ________ is a shortage of an electron (something like a positive ion) and it moves along opposite the direction of electrons.

Answer 41

Hole

Question 42

When most of the charge carriers are electrons, the semiconductor is called ________.

Answer 42

N-Type

Question 43

When most of the charge carriers are holes, the semiconductor is called __________.

Answer 43

P-Type

Question 44

In a semiconductor, the more abundant type of charge carrier is called ____________. The less abundant kind is called the ____________.

Answer 44

Majority Carrier Minority Carrier

Question 45

Whenever there is movement of charge carriers in a substance, there is an electric ___________.

Answer 45

Current

Question 46

Current is measured in the terms of the number of ___________ or _________ passing a single point in a second.

Answer 46

Electrons Holes

Question 47

A ___________ is equal to approximately 6,240,000,000,000,000,000 electrons or holes.

Answer 47

Coulomb

Question 48

A current of one coulomb per second is called a __________ and is the standard unit of electrical current.

Answer 48

Ampere

Question 49

Charge carriers, particularly electrons, can build up or become deficient, on things without flowing anywhere. This is called __________ electricity.

Answer 49

Static

Question 50

A device called a _________ uses static electricity to cause a spark.

Answer 50

Van De Graaff Generator

Question 51

When a charge builds up, with positive polarity (shortage of electrons) in one place and negative polarity (excess of electrons) in another place, a powerful ___________ Force exists.

Answer 51

Electromotive (EMF)

Question 52

Electromotive force is measured in units called ______.

Answer 52

Volta

Question 53

An EMF of one volt, across a resistance of one ohm, will cause a current of one amp to flow. This relationship in electricity is stated in ________ Law.

Answer 53

Ohms

Question 54

Voltage or EMF is sometimes called _________ or _________.

Answer 54

Potential Potential Difference

Question 55

A _________ converts visible light is into electrical current or voltage.

Answer 55

Photovoltaic Cell

Question 56

When a conductor moves through a ________, electric current flows through that conductor.

Answer 56

Magnetic Field

Question 57

A generator working in reverse is a _____.

Answer 57

Motor

Question 58

_________ is closely related to electricity.

Answer 58

Magnetism

Question 59

_______ energy is converted into electrical energy in all dry cells, wet cells, and batteries.

Answer 59

Chemical

Question 60

In a _______ circuit, a charge does not pass through every resistor; rather, it passes through a single resistor.

Answer 60

Parallel