D. Looking straight to the sun can damage human's eye,
2. The following describes radio waves EXCEPT
A Radio waves can cause respiratory disease.
B. Mobile phones give off radio waves and micro waves.
C. People who are working on radio antenna are more likely to get high exposure to radio waves.
D. Harmful effects can be lessened by lessening the time of exposure to electronic gadgets,
3. Joshua Gabriel felt the heat and imitation on his face after long exposure to sunlight. What caused it?
A Infrared radiation
C. microwave radiation
B. radiowave radation
D. gamma radiation
4. Most of the EM waves are invisible to the eyes, EXCEPT
A. Garuia rays
C. Utravilolet rays
B. Radiowaves
D. Visible light
5. What happens to the visible light when it lluminates a black object?
A It absorbs all colors in the visible light.
B. It refects all colors in the visible light
C. A only
D. A&B
6. What type of electromagnetic wave breaks polymers like plastics and nylon?
A Gamma rays
B. Marowaves
C. ultraviolet rays
D. X-ray
7. The following are effects of ultraviolet rays, EXCEPT
A It can damage the eye
C. It leads to radiation poisoning.
B. It can cause skin cancer.
D. It suppressed the immune system.
8. Frequent exposure to X-ray should be avoided because
A It can cause cancer
C. It damage healthy living cells of the body
B. It suppressed the immune system.
D. a and b
9. Which of the following are risk factor for X-ray damage?
A. being female
C. higher number of X-ray exams
B. receiving X-ray at a young age.
D. all of the above
10. Which of the following electromagnetic waves are given off by radioactive materials like cobalt-60 and
cesium-137?
A Gamma rays
C. ultraviolet rays
B Microwaves
D.X-rays​