NOS

Question 1

What is Pure Science?

Answer 1

Is to discover what that objective really is.
This is done by collecting evidence from which conclusions can be drawn about the nature of the Universe. These conclusions may in turn can be drawn about the nature of the Universe, meaning that new evidence needs to be gathered to answer those new questions.

In summary, the nature of science is to convert the concrete into abstractions (laws and theories).

Question 2

What is a fallacy?

Answer 2

A fallacy is a misleading or false argument, something that does not logically support the case a person is making both scientists and the public need to be aware of the common fallacies, so that they can recognize them in scientific debate and avoid using them themselves.

Question 3

What are hasty generalizations ?

Answer 3

Occur when people base a broad conclusion or theory on just a few observations.

Question 4

What is Applied Science?

Answer 4

This uses scientific understanding for a specific purpose.

Question 5

Is electricity a secondary or primary energy resource?

Answer 5

IS A SECONDARY ENERGY SOURCE AS IT IS GENERATED BY NON-RENEWABLE AND RENEWABLE PRIMARY SOURCE OF ENERGY.

Question 6

How do power stations work?

Answer 6

IN POWER STATIONS, THE PRIMARY ENERGY SOURCE DRIVES A TURBINE EITHER DIRECTLY AS WITH WIND OR INDIRECTLY AS WITH STEAM, COMBUSTION OF FUELS WHICH ROTATES THE GENERATOR COILS TO PRODUCE A CURRENT POWER STATION.

Question 7

How does A Van Graff generator work?

Answer 7

IT REMOVES ELECTRONS TO PRODUCE A POSITIVE CHARGE ON ITS DOME. A PERSON DOES NOT HAVE TO TOUCH THE DOME TO START FEELING THE EFFECTS AS STATIC ELECTRICITY IS A NON- CONTACT STATE.

Question 8

What is a model?

Answer 8

A MODEL is a representation of an idea, an object or even a process or a system that is used to describe and explain phenomena that cannot be experienced directly.

Question 9

How do batteries work?

Answer 9

Positive and negative electrodes are separated by the chemical electrolyte, the positive ion then flows into the electrolyte, while the electrons flow around the outside circuit to the positive electrode and make the light bulb turned on.

Question 10

Who is Volta?

Answer 10

Alessandro Volta (1745-1827): Alessandro Volta was an Italian scientist and physicist who is best known for his invention of the battery.

Question 11

Who is Galvani?

Answer 11

Galvani found a connection between metallic contact and the movement of a frog’s leg.
Galvani( 1737- 1798) built an instrument in which he attached a frog’s muscle and tied it to an electrode of one metal, and an electrode of a different metal was attached with the frog muscle. He was aware of that animal bodies made conclusive movements when electricity was applied to it. However, Galvani did not agree with Volta’s theories because he believed that they were short sighted.

Question 12

How does the Hauksbee experiment work?

Answer 12

Hauksbee’s Experiment was designed by Francis Hauksbee, the Hauksbee electrostatic generator, that consisted a glass globe that which could be rotated rapidly by a hand making it possible to generate an electric charge by rubbing the globe with a cotton cloth or by hand.

Question 13

What is a battery?

Answer 13

A battery is a collection of one more cells whose chemical reactions create a flow of electrons in a circuit. batteries are made up of an anode, cathode, and an electrolyte.

Question 14

Hauksbee’s experiment (1705), Static Electricity.

Answer 14

He designed an electrostatic generator, and static electricity, a phenomenon.
He placed a globe of his device on an axle which he attached to a large wheel, he began to spin the large wheel. This caused the globe to rotate, while it was spinning fast, he placed his hand over the globe from which he had previously evacuated all the air and added mercury. Suddenly he found light. His work paved for other to create even-better electrostatic generators capable of producing larger and larger voltages.

Question 15

Benjamin Franklin

Answer 15

Benjamin Franklin, contributing to electricity the kite experiment he was able to determine electricity from light. metal rod, Leyden jars.

Question 16

Faraday, electric motor and generator.(1821-1831).

Answer 16

electric motor

Question 17

Where do we see electricity in nature?

Answer 17

• Lightning bolts.

Question 18

What is a primary battery and secondary battery?

Answer 18

It is a battery that is designed to be used once and discarded and not recharged while the secondary battery is a battery that can be recharged.

Question 19

National Power Grids:

Answer 19

National Power grid distributes electricity around the world or country. The electricity may be produced by a conventional power station using a generator.

Question 20

Force:

Answer 20

a push or pull

Question 21

Speed

Answer 21

is the distance traveled per unit of time. It is the scalar quantity and doesn’t have a direction. A higher speed means an object is moving faster. A lower speed means it is moving slower.

Question 22

What forces are on the bottle causing it to be displaced?

Answer 22

The water is displaced because of high pressure. The pressure inside the bottle is greater than the outside air and that generates a greater force than gravity.

Question 23

What are physical properties?

Answer 23

A physical property can be observed or measured without changing the composition of matter. Examples of physical properties are: color, odor,mass, volume, magnetism, and has the ability to conduct electric current.

Question 24

Physical Properties:

1. Thermal conductivity

Answer 24

the rate at which a substance transfers heat

Question 25

State:

Answer 25

is the physical form in which a substance exists such as solid, liquid and gas.

Question 26

. Malleability

Answer 26

ability of a substance to be rolled.

Question 27

. Ductility

Answer 27

the ability for a substance to be pulled into a wire.

Question 28

Solubility

Answer 28

the ability for a substance to be dissolved into another.

Question 29

Metals?

Answer 29

Most metals are very strong, they have high melting points and high heat and electrical conductivity

Question 30

Bonding???????

Answer 30

Intra-molecular: 
- Pure Covalent bonding:
- Ionic Bonding: 
A molecule consists of two or more non-metal atoms joined together by covalent bonds. 
A molecule can be: 
- an element 
- a compound 
- A covalent bond is formed when a pair of electrons is shared between two atoms. These shared electrons are found in the outer shells of the atoms. In general each atom contributes to one electron to the shared pair of electrons.

Question 31

How do stars form elements?

Answer 31

Elements do not form out of nothing in stars; they are converted from hydrogen through a process known as nuclear fusion. It happens when the temperature of the hydrogen goes up
.

Question 32

What is a nuclear fusion in a star?

Answer 32

Nuclear fusion involves two atomic nuclei joining to make a large nucleus.
The sun and other stars use nuclear fusion to release energy, hydrogen nuclei joins to form helium nuclei.