Test # 18
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760 questions in 76 tests. Each test contains 10 questions.
Idiom of the Day
armed and dangerous
to have a weapon that may be used (usually used for a criminal)
The criminal was armed and dangerous when the police arrested him.
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Science Experiments Ideas
Make two ducks from paper doubled over and glued and push a magnetised pin into each one. Place the ducks on cork disks in a dish of water. After moving around they line up with their beaks or tail tips together in a north south direction.The ducks approach each other along the magnetic field lines. Their movement is caused by different forces the attraction of unlike magnetic poles, the repelling effect of like poles, and the earths magnetism. Set the magnets so that two poles which will be attracted are placed in the beaks.