Science year 2.1: energy sources

• Science
• Middelbare school
• havo, vwo
• Leerjaar 2

Welcome

Today we start with topic 2 about Energy

Home practicum (growing a plant from a bean), next week more information

In the lessons 1 day of theory, 1 day of practica or practicum assignment

Today's lesson in Lesson-up (interactive)

This topic's finish

Test in test week 2 about entire topic 2

Practical test (from testweek 1)

Scientific report about growing a bean

Learning goals

- Give examples of energy sources

- Identify different forms of energy

- Identify the type of energy conversion takes place

- Explain the difference between renewable an non-renewable
   energy and identify which one applies

- Explain the difference between non-sustainable and
   sustainable energy sources and identify which one applies

Which types of energy do you know?

2.1 Energy sources

Which description fits best to the energy forms:

• Elektromagnetic (light,...)
• Nuclear
• Thermal
• Kinetic (movement)
• Sonic (sound)
• Chemical
• Electrical

Kinetic energy

Thermal energy

Chemical energy

Electric energy

Nuclear energy

Sonic energy

Energy that results from movement of an object

Energy resulting from a temperature difference between two systems

Energy resulting from reactions between atoms and / or molecules

Energy resulting from the flow of electrons

Energy resulting from changes in the atomic nuclei or from nuclear reactions

Energy in the form of sound waves

01:23

Will the ball hit the man's face?

Yes

No

Law of conservation of energy

Energy is not created or destroyed

Energy can be transformed from 

one form to another

What do we mean when we say:
 energy is “lost” ?

Energy is never destroyed, but some energy conversion is not useful for us

Example: Your macbook heating up, instead of converting the electrical energy to only light and sound → we “lose” energy in the form of heat

What type of energy conversion fits best at the shown power plant?

1. kinetic energy to electric energy to thermal energy
2. Chemical energy to electric energy
3. kinetic energy to nuclear energy to electric energy
4. Thermal energy to kinetic energy to electric energy

Energy conversion
at a fossil-fired power plant

Chemical energy ⇒ thermal energy(heat)

           by burning coal or gas

Thermal energy(heat) ⇒ kinetic energy

           Heating water produces steam, the steam is used to rotate the steam                 turbine

Kinetic energy ⇒ electrical energy

           This happens in the generator, similar 

           to what happens in a dynamo

Chemical energy

Electrical energy

Kinetic Energy

Thermal Energy

Write down as many energy sources as you can.

Energy sources

Renewable: It does not run out, it renews itself

Non-renewable: It runs out, so we won’t be able to use it forever

Renewable

Non-Renewable

Solar energy

Natural Gas

Nuclear energy

Coal

oil

Wind

Geothermal

Biomass

Sustainable

An energy source is that is both renewable and does not harm the environment is called sustainable.

Homework

Do special assignment about endothermic and exothermic energy in classroom

before Thursday 1th Dec

Make: Questions 1 until 11

Pages 8 until 12 (before ThursdaY 1th of Dec)