today, we had a very nice discussion. we are all NERVOUS. waiting for the next student to explain each topic!luckily, sir mome didn't call me to explain it to the class. >.< im so happy. i got 22 out of 25. wohoo! the following terms are part of our crossword a while ago.
->Radiation is the energy travelling through space
->Background Radiation is that which is naturally and inevitably present in our environment
->Unstable Atom has excess internal energy, with the result that the nucleus can undergo a spontaneous change towards a more stable form called Radioactive Decay.
->Atom is the building blocks of matter
->Curie is the former unit of radioactivity
->Half-life is the time taken for half of the atoms of a radioactive substance to decay
->Alpha Particle consists of two protons and two neurons, in the form of atomic nuclei
->Beta Particle are fast-moving electrons ejected from the nuclei of atoms
->Cosmic Radiation consists very energetic particles including protons which bombard the earth from outer space
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