Fact 1: Apan is used for cooking food by heating food in it on a stove. Fact 2: Fire puts off heat. Given the two facts above, what is used for cooking food by putting it over fire?

OPTIONS:
- a pan
- oil
- a sink
- a fridge
- corn
- Oak
- energy
- a microwave

Answer: a pan

Fact 1: Being burried under soil and mud changes vegetation into peat through extreme heat and pressure in a swamp over a long period of time. Fact 2: Wetlands Wetlands are also called swamps or marshes. Given the two facts above, buried vegetation in a wetland changes to peat over what?

OPTIONS:
- a long period of time
- The area was once underwater
- a brief period of time
- just a day's time
- Physical weathering
- It used to be covered by water
- movements in the earth's crust
- a quick period of time

Answer: a long period of time

Fact 1: Nuclear reactions in stars causes stars to produce light. Fact 2: Nuclear reactions convert mass to energy. Given the two facts above, what causes stars to produce light?

OPTIONS:
- by making heat
- Generating heat
- converting mass to energy
- photosyntehsis
- photosynthetic pigments?
- Evaporation of water
- heat production
- hydrogen and oxygen

Answer: converting mass to energy

Fact 1: Birds are endothermic tetrapod vertebrates. Fact 2: Some birds fly and some birds swim, but all birds have feathers. Given the two facts above, some aviary species fly and others swim but, all endothermic tetrapod vertebrates share what trait?

OPTIONS:
- warm-blooded
- Weight
- fur and fat
- sweating
- Epidermis
- feathers
- retina
- four limbs

Answer:
feathers