26. which of the following defines the period of a wave. A. Amount of time it takes a wavelength to complete one cycle.
B. How many wave lengths happen in a second.
C. An indication of the amount of energy in a wave.
D. The distance between two crests or two troughs.
27. Which of the following refers to the release of energy from the infrared region of the electromagnetic spectrum?
thermal absorption thermal conduction
thermal emission thermal radiation
28. Which of the following types of chemiluminescence occurs inside a living organism?
Bioluminescence fluorescence
Organoluminescence phosphorescence

29. In what way do plants use electromagnetic waves during photosynthesis?
by using it as a source of energy to drive the reaction of carbon dioxide consumption
by using it as a source of energy to drive the reaction of cellular respiration
by using it as a source of energy to drive the reaction of food production
by using it as a source of energy to drive the reaction of oxygen production
30. Which of the following animal actions use bioluminescence?
Camouflage B. defense C. digestion D. luring
31. Which of the following animals use bioluminescence to attract a prey?
Anglerfish B. brittle star C. dinoflagellate D. firefly
32. In what way do brittle stars use bioluminescence?
by detaching a glowing arm C. by detaching glowing spikes
by causing its underside to glow D. by producing a blinding light
33. Why does X-ray work on bones but not on soft tissues?
because the bone marrow absorbs X-rays
because calcium in the bone absorbs X-rays
because phosphate in the bone absorbs X-rays
because red blood cells absorb X-rays
34. In infrared thermography, how are tumor tissues distinguished from healthy tissues?
Tumors emit equal infrared radiation than healthy tissues.
Tumors emit less infrared radiation than healthy tissues.
Tumors emit sufficient infrared radiation than healthy tissues.
Tumors emit more infrared radiation than healthy tissues.
35. Gamma knife surgery is done to remove small and critically-located tumors. Which of the following conditions is the most suitable for this treatment?
brain tumors B. muscle tumors C. skin tumors D. stomach tumors
36. Ultraviolet radiation through fluorescence is very helpful in forensic investigations. In which of the following materials does this procedure work?
Fingerprints B. natural hair C. saliva D. urine
37. Radiation sterilization is used in water treatment to kill microorganisms such as bacteria. What is the classification of the radiation used in this process?
Infrared B. microwave C. ultraviolet D. X-ray
38. Which type of laser is used for the removal of birthmarks?
argon laser C. carbon dioxide laser
hydrogen laser D. nitrogen laser
39. Which subclassification of ultraviolet radiation has a relatively low frequency but is already capable of causing severe sunburn and cellular damage?
UV A B. UV B C. UV C D. infrared ray

40. Which of the following is true about the correlation between the energy of radiation and its effects on cells?
All types of radiation cause the same amount of damage to the body.
The higher the energy of the radiation, the greater the damage to the body.
The lower the energy of the radiation, the greater the damage to the body.
The higher the energy of the radiation, the lesser the damage to the body.
41. Which of the following are examples of ionizing radiation?
gamma ray B. infrared C. ultraviolet D. X-ray
42. Which of the following can possibly happen to plants after overexposure to UV B radiation?
increased size, productivity, and quality of crops
reduced size, productivity, and quality of crops
no effect
cannot be determined
43. In what ways can a person be protected from the sun’s ultraviolet radiation?
Apply sunscreen. C. Go out during nighttime.
Wear a hat. D. Wear sunglasses.
44. In which of the following does the use of microwave oven pose a health risk?
using damaged microwave ovens
using altered microwave ovens
using microwave ovens that did not pass the FDA standards
using microwave ovens following the recommended instructions