2 YR2_T2_LSN9 2.5 sustainability

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

YR2_T2_LSN9

Topic 2.5 Sustainability

Plan for today

• Explanation Topic 2.5 Sustainability
• Make homework 

Learning goals

I can…

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

Key words

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

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

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

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!!

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.

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

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

Sustainable living

How can we live more sustainably?

The 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

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

The greenhouse effect is a natural phenomena

1. True
2. False

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

• Read Topic 2.5 (p.88-89)
  
• Complete the exercise of Topic 2.5 (p.90-97)
• Study the glossary of Topic 2.5 on StudyGo.