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"If knowledge can create problems, it is not through ignorance that we can solve them."

Physics

WHAT IS A JOULE? »
A joule (J) is a small unit of energy. More commonly, we measure energy in kilojoules ...
HOW CAN ENERGY BE STORED? »
Energy from the Sun is stored in the leaves of plants, but it is also possible to ...
HOW DO HUMAN BEINGS GET THEIR ENERGY? »
Our energy comes from the Sun — but not directly. Plants convert sunlight into chemical ...
HOW DOES A POWER STATION WORK? »
Coal, oil or gas may be used to fuel a power station. All of these are fossil fuels, formed ...
WHERE DOES ENERGY COME FROM? »
Energy is what makes things happen. Nothing can live, move and grow, or give off light, ...

Chemistry

WHAT IS A JOULE? »
A joule (J) is a small unit of energy. More commonly, we measure energy in kilojoules ...
HOW CAN ENERGY BE STORED? »
Energy from the Sun is stored in the leaves of plants, but it is also possible to ...
HOW DO HUMAN BEINGS GET THEIR ENERGY? »
Our energy comes from the Sun — but not directly. Plants convert sunlight into chemical ...
HOW DOES A POWER STATION WORK? »
Coal, oil or gas may be used to fuel a power station. All of these are fossil fuels, formed ...
WHAT ARE THE DIFFERENT KINDS OF ENERGY? »
Chemical energy is released when chemical reactions take place. It is stored in many ...

Biology

COULD HUMANS FIND HOMES ELSEWHERE IN THE UNIVERSE? »
As there are billions of planets in our universe, it is likely that some of them could ...
DOES THE PLANET HAVE ITS OWN RECYCLING SYSTEMS? »
The saying that there is nothing new under the Sun is strangely true. The stuff that makes ...
WHICH KINDS OF ENERGY WILL NOT RUN OUT? »
Wind, moving water and sunshine are always to be found somewhere on the Earth. All of these ...
WHAT ARE NON-RENEWABLE RESOURCES? »
Living things can grow and reproduce themselves. Given the right conditions, they can ...
HOW MUCH LONGER ARE PEOPLE LIVING NOW THAN IN THE PAST? »
In many parts of the world, life expectancy — the number of years that a person can expect ...