YR2_T2_LSN5

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

Get ready

• Your Laptop (join Lesson Up lesson)
• Your notebook.
• Your textbook.
• Pen & highlighter

YR2_T2_LSN5

Topic 2.5 Sustainability

Plan for today:

• Homework check T2.3 and T2.4
• Recap T2.3 and T2.4
• Explanation T2.5 Sustainability
• Make homework 

Homework check T2.3 and 2.4

Open the docs on Classroom

Correct your homework in a different colour.

Bring up your textbook and notebook when your name is called. 

What is the Voltage of a power outlet in a house?

1. 360 V
2. 12 V
3. 230 V
4. 1500 V

Energy

Power

Time

Voltage

current

I

P

U

E

t

A telephone has a 15V battery. Its power in low energy mode is 45W.
What is the current in the telephone?

voltage is the same for all components

current is the same throughout circuit

Series

Parallel

Still works if one lamp is broken

If you connect batteries this way, you can add their voltages

Learning goals

Language:

• I can explain why a vegetarian diet is more sustainable
• I can explain how pesticides can accumulate in the food chain and kill predators
• I can explain how different kinds of pollution can lead to long term problems
• I can explain what the greenhouse effect is and how extra gasses can enhance this and cause global warming

Skills:

• I can identify ways to live more sustainable by using the three R's

Key words

• Vegetarian
• Vegan
• Pescetarian
• Pesticides
• Accumulation
• Biodegradable 
• Greenhouse effect
• Enhanced greenhouse effect
• Greenhouse gasses
• Global warming
• Three R’s (reduce, reuse, recycle)

What does sustainable mean

1. bad for the environment
2. it kills living things
3. better for the environment
4. using pesticides to help the environment

Food energy

All of the energy of our food comes from the sun

A lot of that energy is 'lost' 

By eating less (or no) animals 

we 'waste' less energy

Dietary Choices

You could choose to completely adapt your diet/lifestyle:

1. Vegetarian - You do not eat any meat at all, you could eat dairy & eggs

2. Vegan - You do not eat any animal products at all, and sometimes also avoid using things made from animal (leather / wool).

3. Pescatarian - You are basically a vegetarian that does eat fish.

Make sure you discuss this with your parents/guardians before changig your diet, especially when you are still growing!!

Pesticides

Other things that do NOT help the environment:

1. Pesticides (to kill insects on crops)

2. A lot of transport (fuel usage)

3. Use of antibiotics for animals

All this builds up in the food chain before it gets to us

This is called accumulation

Organic food is produced without 

the use of pesticides

Pollution

Our modern way of life causes a lot of pollution.

A lot of materials like plastic are NOT biodegradable.

Eventually these plastics will get smaller and 

get into our food chain.

Pollution _________________________.

1. is harmful materials put into the environment
2. found in air, water, and land
3. effects plants, animals, and people
4. All of the above

Greenhouse effect

The earth is absorbing the heat of 

the sun like a greenhouse.

This is causing the earth to warm up 

which is known as the Greenhouse effect.

A continued greenhouse effect is 

now leading to Global Warming.

Greenhouse effect

Greenhouse gasses such as CO2 and Methane 

cause a bigger greenhouse effects.

Heat (radiation) can't leave the atmosphere. 

Earth heats up faster(global warming). 

This is called an Enhanced greenhouse effect

The greenhouse effect is a natural phenomena

1. True
2. False

What is the greenhouse effect?

1. Global warming
2. Climate change
3. Gasses re-radiate heat back to earth
4. Air pollution that heats the earth

Sustainable living

How can we live more sustainably?

The three R's:

• Reduce
• Reuse
• Recycle

Seperate your trash so that certain materials can be used again

 Use things more than once

Lowering the amount of energy and resources you use

Reduce

Reuse

Recycle

Homework

• Complete the exercise of Topic 2.5 
• Study the glossary of Topic 2.5 on StudyGo.

• Prepare for the practical assignment (after Christmas!)
• Practice online with circuits (see classroom/kwizl)

Learning goals

Language:

• I can explain why a vegetarian diet is more sustainable
• I can explain how pesticides can accumulate in the food chain and kill predators
• I can explain how different kinds of pollution can lead to long term problems
• I can explain what the greenhouse effect is and how extra gasses can enhance this and cause global warming

Skills:

• I can identify ways to live more sustainable by using the three R's