Q: Answer the following question given this paragraph: An analog signal consists of continuously changing voltage in a circuit. For example, microphones encode sounds as analog signals. Q: What is continuously changing within a circuit in an analog signal? A:

OPTIONS:
- energy
- frequency
- amplitude
- voltage

A: voltage

input: OPTIONS:
- winds
- fossils
- tides
- waves Now, answer this question: Answer the following question given this paragraph: Wavelength is one way of measuring the size of waves. It is the distance between two corresponding points on adjacent waves, and it is usually measured in meters. How it is measured is a little different for transverse and longitudinal waves. Q: What do wavelengths measure the size of? A:
A:
output: waves

Answer the following question given this paragraph: Q: Dry soils are relatively unproductive because plants need a sufficient quantity of liquid water to carry out what process? A:

OPTIONS:
- contraction
- shrinkage
- flowering
- photosynthesis

Answer: photosynthesis

Problem: OPTIONS:
- drains water
- pressures water
- collects water
- stores water
Q: Answer the following question given this paragraph: Q: Why are the stems of many xerophytes fleshy? A:
Answer: stores water

Problem:OPTIONS:
- Digestive system
- Muscular system
- Integumentary system
- cardiovascular system

Answer the following question given this paragraph: The cardiovascular system moves nutrients and other substances throughout the body. Q: Which human body system system moves nutrients and other substances throughout the body? A:
****
A: cardiovascular system

Problem:OPTIONS:
- radiation
- gravity
- speed
- motion

Answer the following question given this paragraph: Check Your Understanding Define nodes and antinodes. Solution Nodes are areas of wave interference where there is no motion. Antinodes are areas of wave interference where the motion is at its maximum point. Q: Solution nodes and antinodes are both areas of wave interference, but they differ in the presence of what condition? A:
****
A:
motion