Q: The heart is an organ in which system? A:

OPTIONS:
- nervous system
- immune system
- respiratory system
- circulatory system

Answer: circulatory system

Problem: OPTIONS:
- calcium
- lead
- barium
- iron
Q: Q: What in hemoglobin gives red blood cells their red color? A:
Answer: iron

Problem:OPTIONS:
- voltage
- wavelength
- frequency
- amplitude

Q: What is a measure of the size of sound waves? A:
****
A: amplitude

Q: Tuataras, lizards, and snakes are members of what subclass of reptiles? A:
OPTIONS:
- dinosaurs
- arthropods
- staurikosaurus
- lepidosaurs
lepidosaurs

Q: If two populations do not mate and produce fertile offspring, what results? A:
OPTIONS:
- same species
- large species
- small species
- separate species

Answer: separate species

input with options: Q: As altitude rises, what happens to the temperature in the thermosphere? A:
OPTIONS:
- oxygen increases
- oxygen decreases
- temperature decreases
- temperature increases
output:
temperature increases