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Physics

How can we save Earth? »
For thousands of years, people have used the earth’s land, water, and air. Also, people ...
Is Earth heating up continually? »
Earth is slowly getting warmer. Most scientists believe that people are helping to cause ...
Why it is important to use land "wisely"?»
Using the land wisely Every year, there are more people on the earth using more of ...
What is Pollution? »
Pollution is anything that people do those damages the natural environment. For example, if ...
What are Natural Resources?»
The Earth’s natural resources What if there weren’t an ocean or any lakes, ponds, ...

Chemistry

What makes it snow?»
Take a close look at some snowflakes. You can see that they aren’t drops, like rain; or ...
What is air made of? »
Air doesn’t seem to be made of anything. It has no colour, taste, or smell, and you can see ...
What is net-zero emission?»
The U.S. president-elect Joe Biden has declared that the U.S. will return to the Paris ...
If water contains oxygen and there is fuel and heat, can a fire burn in water?»
You need three things for a fire, right? Fuel, oxygen, heat. So if hydrogen is ...
What do chemists do?»
Chemists . One of the physical sciences is chemistry. Chemists study chemicals and other ...

Biology

Which is the smallest and lightest bone in the human body?»
The stapes is the smallest and lightest bone in the human body at 3mm x 2.5 mm in size. ...
What is digestive system?»
Ever wondered what happens to the food you eat once you swallow? The digestive system ...
How does water help your skeletal system?»
The amount of water you consume affects how well your bones can do their job. ...
When does dehydration occur?»
Dehydration occurs when you use or lose more fluid than you take in, and your body ...
In general, how much water should children and teens drink a day?»
In general, children and teens need about 6 to 8 cups of water a day. They ...