Problem:OPTIONS:
- Natural aphrodisiacs
- competing for resources
- Tails
- Urine cleaner
- Something coming from a gland
- Chemical energy
- an area swollen with pus
- Chew toys

Fact 1: Male dogs use pheromones in urine to mark their territory. Fact 2: Pheromones are natural aphrodisiacs. Given the two facts above, what do male dogs use in urine to mark their territory?
****
A: Natural aphrodisiacs

Fact 1: Birds are endothermic tetrapod vertebrates. Fact 2: Penguins are a type of birds. Given the two facts above, what are endothermic tetrapod vertebrates?
OPTIONS:
- mammals
- clouds
- humans
- penguins
- jellyfish
- warm-blooded
- fur and fat
- animals
penguins

Fact 1: Being exposed to wind can cause erosion of soil. Fact 2: On bare, dry soil, wind erosion can remove significant quantities of topsoil. Given the two facts above, what enhances the effects of erosion?
OPTIONS:
- less wind
- dry soil
- coastlines
- flooding
- rivers
- streams
- increase in top soil
- mulch

Answer: dry soil

Question: Fact 1: Macroevolution is evolution over geologic time above the level of the species. Fact 2: Geologic time lines are expressed in geologic eras and periods. Given the two facts above, macroevolution is evolution over what, above the level of the species?
OPTIONS:
- plants
- H 2 O
- years
- scale
- gravity
- eras
- weathering
- Joules
Answer: eras

input with options: Fact 1: Apan is used for cooking food by heating food in it on a stove. Fact 2: Also, microwave ovens produce much less heat than stoves for cooking. Given the two facts above, what produces less heat when cooking?
OPTIONS:
- trout
- bamboo
- microwave
- grill
- Green beans
- fur and fat
- stove
- fire
output: microwave

Problem: OPTIONS:
- coldest season
- Metling snow
- freezes and contracts
- freezes and melts
- mouth of rivers
- In the winter
- freezes and condenses
- freezes and expands
Q: Fact 1: Ice wedging is when ice causes rocks to crack by expanding in openings. Fact 2: Water in the cracks of rocks freeze and expand. Given the two facts above, ice wedging is when water ?
Answer:
freezes and expands