Question: Q: What system of organs delivers blood to all cells of the body? A:
OPTIONS:
- gastrointestinal
- respiratory
- integumentary
- cardiovascular
Answer: cardiovascular

input with options: Q: Microwaves are converted into what kind of energy in a microwave oven? A:
OPTIONS:
- solar energy
- mechanical energy
- light energy
- thermal energy
output: thermal energy

Q: Q: An axe head and a doorstop are types of what simple machine? A:

OPTIONS:
- pulley
- blade
- lever
- wedge

A: wedge

input: OPTIONS:
- storm
- water mass
- weather
- air mass Now, answer this question: Q: The direction of prevailing winds determines the type of what that usually moves over an area? A:
A:
output: air mass

Q: What property increases as an object's mass increases, making a full box harder to push than an empty one? A:

OPTIONS:
- weight
- gravity
- magnetism
- inertia

Answer: inertia

Q: Q: What do you call a predator species that affects other species' populations when its own population size changes? A:

OPTIONS:
- paradox species
- symbiotic species
- complement species
- keystone species

A:
keystone species