Problem:OPTIONS:
- smog tornadoes
- acid rain
- deforestation
- flooding
- carbon emission hurricanes
- Tropical
- low sea levels
- climate

Fact 1: Using a car causes pollution. Fact 2: Acid rain is caused by pollution. Given the two facts above, emission from cars contribute to which weather phenomenon?
****
A: acid rain

Fact 1: Muscle contraction occurs when muscle fibers get shorter. Fact 2: Fibers are oriented diagonally across fiber. Given the two facts above, muscle contraction occurs when a diagonally oriented part of muscle gets what?
OPTIONS:
- shorter
- longer
- vertical
- decreases
- resistance
- muscles
- movement
- forces
shorter

Fact 1: Gravity pulls objects towards planets. Fact 2: Because of gravitation, objects that are on or near the earth are pulled toward it. Given the two facts above, what causes water to stay on earth's surface?
OPTIONS:
- Clouds
- Planets
- rainfall
- friction
- Gravity
- sun's heat
- Dirt
- forces

Answer: Gravity

Question: Fact 1: Clouds are formed by water vapor rising into colder regions of the atmosphere and condensing. Fact 2: Water is made up of H2O molecules. Given the two facts above, what vapor forms clouds by rising into the atmosphere condensing?
OPTIONS:
- rain
- lightning
- greenhouse gas
- H20
- SO2
- pollution
- h2o
- Dew
Answer: h2o

input with options: Fact 1: Biodiversity generally increases from the poles to the equator. Fact 2: Biodiversity contributes to ecosystem complexity. Given the two facts above, ecosystem complexity generally what from the poles to the equator?
OPTIONS:
- decreases
- is constant
- trees
- increases
- stays the same
- environment
- Plants growth
- adding heat
output: increases

Problem: OPTIONS:
- reproduce
- Change colors
- rain or sun shine
- adding heat
- look at the sun
- power up cars
- see in darkness
- walk through yards
Q: Fact 1: Alight bulb requires electrical energy to produce light. Fact 2: Black numbers on a white background are easier to see in darkness or bright light. Given the two facts above, bulbs produce electrical energy to what?
Answer:
see in darkness