CE - Unit Review

Question 1

What are the subatomic particles that atoms are made up of?

Answer 1

Protons, neutrons, electrons

Question 2

What charge does each subatomic particle have?

Answer 2

Protons (+)

Neutrons (neutral)

Electrons (-)

Question 3

What is an ion?

Answer 3

Any atom that has gained or lost an electron therefore gaining a charge

Question 4

How would you describe static electric charge?

Answer 4

Static electric charge refers to an electric charge that builds up on the surface of an object.

Question 5

What is electron affinity?

Answer 5

Electron affinity is the tendency of a substance to hold onto electrons.

Question 6

What does the law of attraction state?

Answer 6

Opposite charges attract.

Question 7

What is the difference between an insulator and a conductor?

Answer 7

An insulator resists and does not allow electrons to freely flow through it while a conductor does.

Question 8

What does electrostatics refer to?

Answer 8

It is the study of static electric charges.

Question 9

How can an object be charged by induction?

Answer 9

A charged object can induce a charge on a neutral object by bringing it near the neutral object which is then grounded to retain its charge.

Question 10

What happens to electrons when something is charged by contact?

Answer 10

Depending on the charge of the object coming into contact with it, the electrons will either be transferred to the new object or to the object that it is coming in contact with.

Question 11

What is an electrical discharge?

Answer 11

A process bu which electric charges are transferred very quickly.

Question 12

What two conditions must be met for current electrical energy to flow?

Answer 12

1. Some sort of energy source to provide energy to the electrons.
2. A complete path for electrons to flow.

Question 13

What is resistance?

Answer 13

The degree to which a substance opposes the flow of electric current flowing through it.

Question 14

What is the difference between series and parallel circuits?

Answer 14

A series circuit only has one path for electrons to flow while a parallel circuit has multiple paths split up junction points.

Question 15

What is renewable energy?

Answer 15

The energy gained from renewable resources that can be reused or replaced.

Question 16

What are some examples of renewable energy?

Answer 16

Wind

Solar

Biomass

Question 17

What is non-renewable energy?

Answer 17

Energy gained from non-renewable resources which are resources that can not be replaces once it is used up.

Question 18

What are some examples of non-renewable resources?

Answer 18

Oil

Coal

Natural Gas

Question 19

How is electrical energy generated in a generator? Explain the different parts.

Answer 19

A fluid is used to spin a turbine that in turn spins copper wire and magnets past each other therefore releasing electrons and creating electricity.

Question 20

Describe some characteristics of Fossil Fuels.

Answer 20

• consist of coal, oil, and natural gas
• produced from organic matter of organisms that lived millions of years ago, therefore considered non-renewable
• usually burned to boil water, and the steam is used to push the blades on a turbine and create power

Question 21

Describe some characteristics of Nuclear Energy.

Answer 21

• atoms of heavy elements such as uranium are split to release energy
• the heat released is used to heat water to produce steam and spin a turbine

Question 22

Describe some characteristics of Geothermal Energy.

Answer 22

• comes from water heated by molten rock in the Earth’s core that rises to the surface as hot water or steam
• to produce electricity a very hot source needs to be found

Question 23

Describe some characteristics of Solar Energy.

Answer 23

• comes from collecting the energy from the Sun’s rays

- Solar panels are mainly made of silicon

Question 24

Describe some characteristics of Wind Energy.

Answer 24

• wind turbines use moving air to spin blades connected to a generator
• the faster the wind the higher the amount of energy turbines produce

Question 25

Describe some characteristics of Biomass.

Answer 25

• made of organic material such as plant and animal waste (ex: wood shavings, peat, straw, nutshells, sewage, and oat hulls)
• the organic waste disco poses producing methane which can then be burned to make steam a spin a turbine

Question 26

What does sustainable development mean?

Answer 26

The development of energy that meets the needs of the present without compromising the ability of future generations to meet their own needs.

Question 27

What does it mean if a device is “efficient”?

Answer 27

There is a good ration between the useful energy that comes out of a device compared to the total energy input.