2 YR2_T2_LSN2 2.1

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

Topic 2.1

Energy sources 

Topic 2.1

Week	Planning
47	Topic 2.1 + Bean Pr
48	Topic 2.2 + Bean Pr
49	Topic 2.3 + Bean Pr
50	Topic 2.4 + Bean Pr
51	Submission Bean Pr
52-1	Christmas Break

Week	Planning
2	Topic 2.5
3	Graded lab lesson
4	Test Topic 2
5
6
7

BEAN PROJECT

Growing beans in a glass jar (with kitchen paper, cotton wool and some water!)

BEAN PROJECT

• 1 - 14 days: measuring the length of the bean plant
• Use a ruler or geo triangle and add results to Google spreadsheet

My research question is:

My hypothesis is:

Learning goals

I can:

• Give examples of different energy sources
• Identify different forms of energy
• Identify the type of energy conversion that takes place
• Explain the difference between renewable and non-renewable energy and identify which one applies
• Explain the difference between sustainable and non sustainable energy sources and identify which one applies

Key words

• Energy
• Law of conservation of energy
• Renewable 
• Non-renewable
• Sustainable 
• Non-sustainable

Forms of energy

Energy

Most common forms of energy:

In the morning you eat a sandwich and then cycle to school.
What type of energy conversion is this?

1. Chemical -> electrical
2. Chemical -> kinetic (motion)
3. Kinetic (motion) -> electrical
4. Kinetic (motion) -> chemical

Wood is burned in the fireplace and this is used to heat the room.
What type of energy conversion is this?

1. Kinetic (motion) -> thermal
2. Chemical -> kinetic (motion)
3. Chemical -> thermal
4. Kinetic (motion) -> chemical

Law of conservation of energy

Energy is not created or destroyed

Energy can be transformed from one form to another

What is “lost” energy?

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

Electrical energy

Electrical energy is “produced” in a power station by converting energy

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

Energy sources

Renewable = renews itself

non-renewable =  runs out, wont be able to use it forever

Homework 

Next week:

• Read the Bean project manual (Introduction/growing the beans) (classroom)

• Make exercises 1-11 of topic 2.1 in your workbook