Q: Changing the frequency of sound waves, will change the _________ of the sound of a musical instrument? A:

OPTIONS:
- velocity
- distance
- direction
- pitch

Answer: pitch

Problem: OPTIONS:
- circulation
- respiration
- digestion
- photosynthesis
Q: Q: Mesophyll consists mainly of parenchyma cells specialized for what? A:
Answer: photosynthesis

Problem:OPTIONS:
- hydrogen model
- solar model
- gravitational model
- planetary model

Q: What model of the atom features an electron orbiting a nucleus, forming a closed-current loop and producing a magnetic field with a north pole and a south pole?. A:
****
A: planetary model

Q: In physics, the number of waves that pass a fixed point in a given amount time is referred to as what ? A:
OPTIONS:
- combination frequency
- wave count
- creation frequency
- wave frequency
wave frequency

Q: Decay of what provides some of earth's internal heat? A:
OPTIONS:
- ionic elements
- decaying elements
- radioactive compounds
- radioactive elements

Answer: radioactive elements

input with options: Q: The lunar landscape is covered by craters caused by what? A:
OPTIONS:
- earth impacts
- volcanoes
- water
- asteroid impacts
output:
asteroid impacts