Science year 2.5: sustainability

• Science
• Middelbare school
• havo
• Leerjaar 2

Today

last paragraf of topic 2

preparing for testweek

Everything is in classroom

What was renewable energy?

1. New types of energy
2. It does not run out, it renews itself
3. energy that consists of waves
4. It runs out, so we won’t be able to use it forever

What does the 'law of conservation of energy' mean?

1. energy can not convert from one form to another
2. Energy has to uphold the law
3. Energy is never lost
4. Energy is lost when converted

Nuclear energy is

1. sustainable
2. Renewable
3. sustainable and renewable
4. Not sustainable nor renewable

heat transfer via direct contact.

heat transfer via air or water.

heat transfer via light/ electromagnetic radiation

convection

conduction

Radiation

learning goals

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

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 choices

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 'lose' less energy

food choices

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

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

What is air pollution?

1. Any harmful substance that builds up in the air
2. pollen, dust, gases
3. chemicals in the water
4. industrial pollution

greenhouse effect

The effect is important for earth 

It keeps the earth warm

But to much is not OK

Greenhouse effect

greenhouse effect

greenhouse gasses such as carbon dioxide ( CO₂ ) and methane ( CH₄ )
 cause a bigger greenhouse effects

Heat (radiation) can't leave the atmosphere 

Earth heats up (global warming)

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

Energy

Power

Time

Voltage

current

I

P

U

E

t

Place the correct symbol behind the electrical components

Battery

Wire

Switch

Light bulb

LED

Mains socket

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

Sustainable living

How can we live more sustainable

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

What is a catalyst?

1. something that makes substances burn
2. something that prevents materials to burn
3. something that increases the ignition energy
4. something that lowers the ignition energy

What is the Voltage of a electrical socket in a house?

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

What part of an atom makes it possible for electrical energy to trafel?

1. Proton
2. Nucleon
3. Muon
4. Electron

The formula is P = U x I
Witch of these is also correct?

1. U = I / P
2. U = P x I
3. U = P / I
4. U = P + I

Testweek

Theory test - about topic 2

Theory test

in testweek

1. about topic 2

2. Lesson-ups and slides in classroom

3. Games and video's in classroom

5. learning goals in classroom

5. Start in time 

6. Bring your calculator, pen and pencil