Worksheet 1-1: Nature of Our Surroundings Matter and Energy- Sources of Ionizing Radiation
What is the approx. annual effective dose from natural environmental radiation at sea level?
1 mSv/yr (100 mrem/yr)
Which of the following examples best represents energy? A. A snowman B. A thrown snowball C. Anode mass D. The metal plates in a battery E. The terminals of a battery
A thrown snowball
Which of the following contributes more than 1 mSv per year to each of us?
Exposure to radon
The milligray in air (mGy) relates to which of the following?
Ions produced in the air
What is a unit of energy?
Joules (J)
Which of the following is the principal difference between mass and weight?
Mass is the equivalence of energy; weight is the force exerted by gravity
Which of the following is an example of potential energy? A. A heated cathode B. A mobile x-ray machine C. An x-ray beam D. An x-ray imaging system E. Visible light
No correct answer?
Which of the following is an example of electromagnetic radiaiton?
Visible Light
Which of the following results in the highest annual radiation dose?
diagnostic x-rays
When ionization occurs, which of the following is true? A. the negative ion is electromagnetic radiation B. the negative ion is the ion pair C. the negative ion is the target atom D. the positive ion is electromagnetic E. the positive ion is the resulting atom
e. the positive ion is the resulting atom
Radiation is:
energy transferred
What is ionizing electromagnetic radiation?
gamma rays
X-rays are most like:
gamma rays
What is the unit of mass?
kg
What is the largest source of human exposure to man-made radiation?
medical diagnostic radiation
Energy is defined as:
the ability to do work
In Einstein's famous E=mc^2 equation, c stands for?
the speed of light
Which of the following items is considered to be matter: a. airport surveillance x-rays b. anode heat c. cell phone signals d. light from a movie projector e. wet snow
wet snow
