input: OPTIONS:
- motion
- clouds
- cold
- climate
- temperature
- orbit
- gravity
- wind Now, answer this question: Fact 1: The Earth being tilted on its rotating axis causes seasons. Fact 2: Seasons are caused by the tilt of the axis relative to the planet's orbit. Given the two facts above, what causes a planet's seasons?
A:
output: orbit

Fact 1: Changes in the pH of soil can cause plants to die. Fact 2: Sulfur lowers pH in soil. Given the two facts above, what can cause plants to die?

OPTIONS:
- Planting flowers
- Winter
- Pollution
- Condensation
- Photosynthesis
- Sulfur
- coal
- bacteria

Answer: Sulfur

Problem: OPTIONS:
- zinc
- fossil fuels
- density
- loose soil
- precipitation
- limestone
- hydrocarbons
- volume
Q: Fact 1: Flowing water can slowly dissolve carbon in sedimentary rock. Fact 2: Limestone is a type of sedimentary rock. Given the two facts above, what can flowing water slowly dissolve carbon in?
Answer: limestone

Problem:OPTIONS:
- Greenhouse gasses
- forward motion
- harmful substances
- wear on tires
- Greenhouse gases
- major threat to health
- contamination
- sore bottom

Fact 1: Riding a bike does not cause pollution. Fact 2: Air pollution Air pollution is a major threat to health. Given the two facts above, riding a bike does not cause what?
****
A: major threat to health

Fact 1: An earthquake causes the ground to shake. Fact 2: An earthquake is the shaking of the crust. Given the two facts above, what do earthquakes affect?
OPTIONS:
- core
- mantle
- homes
- crust
- earth
- ocean
- animals
- ground
crust

Fact 1: If an object in a fluid is more dense than that fluid then that object will sink in that fluid because of gravity. Fact 2: Waves can be created at the boundary between fluids of different densities. Given the two facts above, objects will sink between boundaries with different what due to gravity?
OPTIONS:
- Energy.
- surfaces
- densities
- forces
- rocks
- minerals
- energy
- heat energy

Answer:
densities