input with options: Answer the following question given this paragraph: The speed of sound also depends on the temperature of the medium. For a given medium such as air, sound has a slower speed at lower temperatures. You can compare the speed of sound in air at different temperatures in Table below . A lower temperature means that particles of the medium are moving more slowly, so it takes them longer to transfer the energy of the sound waves. The amount of water vapor in the air affects the speed of sound as well. Do you think sound travels faster or slower when the air contains more water vapor? ( Hint: Compare the speed of sound in water and air in Table above . ). Q: The amount of water vapor in the air and the temperature of the medium affects how fast what travels? A:
OPTIONS:
- colour
- light
- traffic
- sound
output: sound

Q: Answer the following question given this paragraph: Transition metals include the elements that are placed below the periodic table. Those that follow lanthanum (La) are called lanthanides. They are all shiny, relatively reactive metals. Those that follow Actinium (Ac) are called actinides. They are all radioactive metals. This means they are unstable. They break down into different, more stable elements. You can read more about radioactive elements in the chapter Nuclear Chemistry . Many of the actinides do not occur in nature but are made in laboratories. Q: What do you call the metal elements listed below the periodic table? A:

OPTIONS:
- rare metals
- shift metals
- process metals
- transition metals

A: transition metals

input: OPTIONS:
- produce off
- Roll over.
- develop off
- reflect off Now, answer this question: Answer the following question given this paragraph: Waves may reflect off an obstacle that they are unable to pass through. When waves are reflected straight back from an obstacle, the reflected waves interfere with the original waves and create standing waves . These are waves that appear to be standing still. Standing waves occur because of a combination of constructive and destructive interference. You can see animations of standing waves at the URLs below. Q: What do waves do when they are unable to pass through an object? A:
A:
output: reflect off

Answer the following question given this paragraph: Each silicon atom has four valence electrons it shares with other silicon atoms in a crystal. A semiconductor is formed by replacing a few silicon atoms with other atoms that have more or less valence electrons than silicon. Q: Each silicon atom shares how many valence electrons with other silicon atoms in a crystal? A:

OPTIONS:
- five
- ten
- three
- four

Answer: four

Problem: OPTIONS:
- codons
- glycine
- filaments
- nucleotides
Q: Answer the following question given this paragraph: Elongation is the addition of nucleotides to the mRNA strand. Q: Elongation is the addition of what to the mrna strand? A:
Answer: nucleotides

Answer the following question given this paragraph: Within seconds of birth, the umbilical cord is cut. Without this connection to the placenta, the baby can't exchange gases, so carbon dioxide quickly builds up in the baby's blood. This stimulates the baby's brain to trigger breathing, and the newborn takes her first breath. Q: What structure connects the fetus to the placenta, allowing the exchange of gases? A:

OPTIONS:
- sediment cord
- skin cord
- belly button
- umbilical cord

Answer:
umbilical cord