Test # 128
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1500 questions in 150 tests. Each test contains 10 questions.
Idiom of the Day
hit the bricks
to start walking, to go out into the streets (on strike)
The post office workers hit the bricks and went on strike.
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Science Experiments Ideas
Shooting puffed rice
Charge a plastic spoon with a woollen cloth and hold it over a dish containing puffed rice. The grains jump up and remain hanging on the spoon until suddenly they shoot wildly in all directions.The puffed rice grains are attracted to the electrically charged spoon and cling to it for a time.Some of the electrons pass from the spoon into the puffed rice, until the grains and the spoon have the same charge. Since, however, like charges repel one another, we have this unusual drama.