input with options: Answer the following question given this paragraph: The drummer in Figure below is hitting the drumheads with drumsticks. This causes the drumheads to vibrate. The vibrations pass to surrounding air particles and then from one air particle to another in a wave of energy called sound energy . We hear sound when the sound waves reach our ears. Sound energy can travel through air, water, and other substances, but not through empty space. That's because the energy needs particles of matter to pass it on. Q: What energy, produced by vibrations, cannot travel through empty space? A:
OPTIONS:
- light
- heat
- plasma
- sound
output: sound

Q: Answer the following question given this paragraph: An ionic bond is the force of attraction that holds together positive and negative ions. It forms when atoms of a metallic element give up electrons to atoms of a nonmetallic element. Q: What is the the force of attraction that holds together ions? A:

OPTIONS:
- covalent bond
- soluble bond
- magnetic bond
- ionic bond

A: ionic bond

input: OPTIONS:
- primary nervous system
- active nervous system
- large nervous system
- central nervous system Now, answer this question: Answer the following question given this paragraph: The central nervous includes the brain and spinal cord. The brain is the control center of the nervous system. It controls virtually all mental and physical processes. The spinal cord is a long, thin bundle of nervous tissue that passes messages from the body to the brain and from the brain to the body. Q: The brain and spinal cord are part of what system, which serves as a control center? A:
A:
output: central nervous system

Answer the following question given this paragraph: There are two common ways to measure pH. When only an approximate pH value is needed, an inexpensive test involves the use of acid-base indicators , which change color based on the relative acidity of the solution. One type of common indicator is litmus paper. For example, if a piece of litmus paper is dipped into an acidic solution (pH below ~4.5), it will turn red, and dipping it into a basic solution (pH above ~8.5) will turn it blue. Solutions of intermediate pH will result in various shades of purple. Because different indicators change color at different pH values, the use of multiple indicators can generally narrow down the possible pH of a solution to a range of about 0.5-1 pH units. Figure below shows the colors exhibited by various indicators at different pH values. Q: How does litmus paper indicate the ph value of a solution? A:

OPTIONS:
- by texture
- by shape
- by smell
- by color

Answer: by color

Problem: OPTIONS:
- electron shell
- mixture
- gas
- solid
Q: Answer the following question given this paragraph: When an ionic compound dissociates in water, water molecules surround each ion and separate it from the rest of the solid. Each ion goes its own way in solution. Saylor URL: http://www. saylor. org/books. Q: When an ionic compound dissociates in water, water molecules surround each ion and separate it from the rest of the what? A:
Answer: solid

Answer the following question given this paragraph: Loudness refers to how loud or soft a sound seems to a listener. The loudness of sound is determined, in turn, by the intensity of the sound waves. Intensity is a measure of the amount of energy in sound waves. The unit of intensity is the decibel (dB) . Q: What is measured by the intensity of the sound waves? A:

OPTIONS:
- inputs
- tone
- pitch
- loudness

Answer:
loudness