Fact 1: Flowing water can slowly dissolve carbon in sedimentary rock.  Fact 2: Rivers and streams are bodies of fresh, flowing water.  Given the two facts above, what can slowly dissolve carbon in sedimentary rock?
OPTIONS:
- hydrocarbons
- acetic acid
- precipitation
- evaporation
- rivers and streams
- puddles
- ponds
- nitrogen
rivers and streams

Fact 1: Cold fronts cause thunderstorms as they pass by.  Fact 2: Thunderstorms Thunderstorms give birth to tornadoes.  Given the two facts above, what causes tornadoes? ?
OPTIONS:
- Electrical energy
- scattered light
- hypothyroidism
- Time and energy
- harmful substances
- Cold fronts.
- Tropical
- heat energy

Answer: Cold fronts.

Question: Fact 1: Dilation occurs when cell walls relax.  Fact 2: Conversely, a decrease in light intensity causes dilation of the pupils.  Given the two facts above, what can cause cell walls to relax?
OPTIONS:
- Decreased light intensity
- Something coming from a gland
- matter vibrating
- Temperature changing
- Water vapor cooling
- the Earth being tilted
- raising their temperature
- heat produced
Answer: Decreased light intensity

input with options: Fact 1: Lung cancer is most often caused by exposure to tobacco smoke.  Fact 2: Tobacco is most commonly smoked in cigarettes.  Given the two facts above, what is lung cancer most often caused by exposure to?
OPTIONS:
- Chemical energy
- carbon dioxide
- asbestos
- sunlight
- water
- fossil fuels
- cigarettes
- hydrocarbons
output: cigarettes

Q: Fact 1: Vertebrates are all chordates that have a backbone.  Fact 2: Invertebrates are animals who lack a backbone or spinal column.  Given the two facts above, what do all vertebrates have that invertebrates don't?

OPTIONS:
- sensory neurons
- fur and fat
- bones and joints
- a jaw bone
- kinetic energy
- Chemical energy
- a spinal column
- a set of gills

A: a spinal column

Fact 1: Conserving water can be used for survival in a dry environment.  Fact 2: Deserts are usually very, very dry.  Given the two facts above, what can be used for survival in the desert?
OPTIONS:
- nutrients
- shade
- food and shelter
- salt and water.
- heat
- picnics
- Conserving water
- Chemical energy

Conserving water