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Bite-size answers to commonly asked questions from inquiring minds

Questions and answers about Our Planet

Q. Why is the sky blue?

Simply click on a question below to be taken to the associated answer  

Q. Why is the sea salty? Why aren’t rivers salty?

Q. Why is the sea blue?

Q. What’s inside our Earth?

Q. How did all the sand get on the beach?

Q. Why is grass green?

Q. Why can’t we feel the Earth spin?

Q. Why do nettles sting?

Q. Why does the tide come in and go out again? What causes tides?

Q. Why are deserts hot in the day but cold at night?

Q. Why don’t lakes have tides like the sea?

Q. Why do leaves change colour (color)?