As a cow grazes on grass, how much of the
grass's energy is transferred to the cow?
a. 90%
b. 10%
c. 1%

Disinfection of impression materials is usually accomplished by a. sterilization with high heat. b. spray or immersion in a chemical disinfectant. c. sterilization with steam under pressure. d. allowing the impression to sit 24 hours in water until all the organisms die.

Nasa scientists must work together to make sure that everything is correct and accounted for when launching a shuttle. besides a physicist, what other type of scientist would be in making sure that the shuttle has the appropriate type and amount of fuel to reach its destination?

How do you date a sample of rock that you suspect as being one of the earliest on earth