Lesson 5

Question: Read the following definitions carefully and choose the letter that describes best the answer.

 

1. The maximum amount of water vapor, which could be present in 1 m³ of the air at any given temperature, is called absolute humidity.

•         Absolute humidity.

•         Absolute magnitude. 

•         Absolute scale.

•         Absolute zero.

2. Elements that can have several different structures with different physical properties-for example, graphite and diamond are two allotropic forms of carbon

•         Allotropic forms. 

•         Air mass.

•         Adiabatic heating. 

•         Adiabatic cooling.

3. The nucleus of a helium atom (two protons and two neutrons) emitted as radiation from a decaying heavy nucleus.

•         Alpha particle.

•         Alternating current.

•         Amp.

•         Ampere.

4. Unit of electric current. It is equivalent to coulomb/sec

•         Amp.

•         Amplitude (of an oscillation).

•         Angle of incidence.

•         Angle of reflection.

5. A part of a spacecraft that is long and cylindrical to hold instruments far from the satellite bus when it is in space.

•         Boom.

•         Compass.

•         Aurora.

•         Corona.

6. Two electric charges or magnetic poles that have the same strength but are opposite in sign or polarity (North versus South)and are separated by a small distance.

•         Dipole.

•         Coronal Mass Ejections.

•         Element.

•         Electron.

7. The smallest unit of an element that can exist alone or in combination with other elements.

•         Atom.

•         Astronomical unit.

•         Avogadro's Number.

•         Axis.

8. Ionizing radiation (alpha, beta, gamma, etc.) from natural sources.

•         Background Radiation.

•         Angular Velocity.

•         Atomic mass unit.

•         Atomic Weight.

9. The theoretical lowest temperature possible, which occurs when all random motion of molecules has ceased

•         Absolute zero.

•         Acceleration due to gravity. 

•         Acceleration.

•         Adiabatic cooling. 

10. A large, more or less uniform body of air with nearly the same temperature and moisture conditions.

•         Air mass.

•         Adiabatic heating. 

•         Adiabatic cooling.

•         Acceleration.