If awindmill converts wind energy into electricity primarily using the energy of moving objects, then what does a windmill primarily use to convert wind energy into electricty? Answer choices: - matter vibrating - stored energy - solar power - batteries - Movement of an air mass - heat is produced - energy of moving objects - Something to move
energy of moving objects

If aporcupine will extend its spines when threatened, then what does a porcupine do with its spines when it's threatened? Answer choices: - killing insects - Shoot them - kill them - protect them - Extend them - Shed them - Retract them - behave
Extend them

Q: If slow cooking food in an oven can be done to preserve it, then slow cooking food in an oven will cause it to be what? Answer choices: - staying warm - kinetic - dangerous - dry and hot - preserved - dormant state - reduced heat - hydration
A: preserved

Question: If density determines whether an object will sink or float, then this determines whether an object will sink or float:? Answer choices: - density - displacement - energy - sun's heat - phase - heat - swim - forces
Answer: density

*Question*
If some parasites are beneficial to humans, then some what are beneficial to humans? Answer choices: - fungi - parasites - roots - humans suffering - natural disasters - honeybees - poisons - orchids
**Answer**
parasites

Q: If burning spruce is used to produce heat, then what is burned to produce heat? Answer choices: - Oak - Gold - Spruce - cellulose - Conifers - bamboo - Plastic - Aluminum
A: Spruce