Energy used for production of ethanol from corn is _____than the energy output
a. more b. less c. the same
b
You might also like to view...
The physical properties of a regular copolymer are normally a weighted _____________of the physical properties of the component polymers.
Fill in the blank(s) with the appropriate word(s).
Galileo's telescopic discoveries of mountains on the moon and spots on the sun were controversial because they suggested that the sun and moon
a. were the same kind of object. b. were not perfect spheres. c. were inhabited. d. orbited each other. e. did not orbit Earth.
Rainbows exist because light in water drops is
1) reflected. 2) refracted. 3) both of these And the main reason drops disperse different colors involves light's different 4) frequencies. 5) speeds. 6) directions. 7) energies.
An important part of the history of our understanding of the atmospheric ozone layer was
A) satellite measurements that showed a dangerous build-up of ozone all over Earth. B) the discovery by Rowland and Molina that jet airplane exhaust is contributing to the greenhouse effect. C) the discovery by Susan Solomon that jet airplane exhaust is contributing to the greenhouse effect. D) the discovery by Rowland and Molina of a large ozone depletion over Antarctica. E) the discovery by Susan Solomon of a large ozone depletion over Antarctica.