Directions: Write the word TRUE if the statement is correct and if not, underline the word or statement incorrect and correct answer on the space provided.
write
1. All x-ray are dangerous because they can damage healthy living cells of the body.
2. Ultraviolet in sunlight radiation produces vitamin D in the skin and gives us tanning effect
3. Microwaves can penetrate the atmosphere of the earth.
4. Radio wave used to transmit sound and picture information over long distance.
5. Infrared wave also damage cells, causing mutation.
6. Gamma rays is absorbed by water molecules, so it can be used for cooking.
7. Over-exposure to UV radiation may cause skin cancer.
8. Low frequency waves are suitable for communication over great distances.
9. Most EM waves are visible to the eye of humans and animals.
10. Visible light are used by banks to check the signature on a passbook.
Modified True or False.
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