Recycling
Save energy
Save Water
Protect Animals
Air pollution
100
What is the blue bin for? 
This bin is usually used for paper.
100
What should you turn off when you left the room?
We should turn off the light to save energy. 
100
Should we leave the water running while we brush our teeth?
No, because it will waste a lot of water.
100
Is cutting trees harmful for animals living in the forest?
Yes. Because some animals live on trees and if trees are cut, they will lost their habitats. Additionally, certain amount of animals need to get their food from trees, such as fruits.
100
What do we breath to stay alive?
Air.
200
Is plastic bottles, cardboard, aluminum can and paper recyclable?
Yes, they are recyclable.
200
Should we unplug chargers when we not use them?
Yes.
200
Fixing a leaking faucet helps to save what?
Water (H2O)
200
What do we call animals that eat only plants?
Herbivores.
200
Which is better for the air?
A. Riding a bike
B. Driving alone in a car
A. Riding a bike
because it will not generate carbon dioxide.
300
Should we clean the containers before recycling them?
Yes. Because dirty containers will contaminate other items that are recyclable. And the liquid or food left on the containers could attract insects and other small animals. Additionally, clean containers will be easier to recycle.
300
Please list two types of energy.
mechanical, electrical, thermal, chemical, nuclear, and radiant energy
300
Please name one way to save water at home.
Take shorter shower, turn off the tap, reuse water for plants, etc......
300
What do bees help plants do?
Bees and other small insects will help to spread pollen.
300
Trees help clean the air by taking what gas and by what process?
Trees help clean the air by taking carbon dioxide and by the process called photosynthesis.
400
What does the recycling symbol look like?
A triangle that forms by three arrows. 
400
Do LED bulbs used more energy or old light bulbs?
LED bulbs. Because the old light bulbs would waste a lot of energy as heat and LED will not lost energy as heat as many as old light bulbs.
400
Can we drink ocean water directly?
Definitely not!!! Because there is too many salt (NaCl) in the ocean and our body couldn't afford that much of salt. Fresh water has less salt compared with the ocean water.
400
What may happen if animals lose their habitat?
They may become endangered or extinct if they don't find new habitat that fit their need.
400
The composition of air. (Arrange orders from highest to lowest)
Nitrogen, oxygen, argon and carbon dioxide. (There are also little amount of rare gas)
500
What materials are most soda cans made? (Besides plastic)
Aluminum, a type of metal. 
500
What gas is reduced when we save energy? (Hint, it is also the gas generated in the cellular respiration.)
Carbon Dioxide (CO2)
500
Why is fresh water so important?
Because organisms couldn't live without water. People, animals, plants, etc... they all need water to survive.
500
What do we call a species that lives only in one specific place on Earth?
Endemic animals.
500
What layer of the atmosphere protects Earth from harmful ultraviolet (UV) rays?
The ozone layer.
