The first national park in the world was ________
A) Grand Canyon
B) Yellowstone
C) Glacier
D) Yosemite
E) Death Valley
B
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Researchers are able to directly measure the rate of productivity in experiments using a radioactively "tagged" atom
Which isotope is commonly used? a. carbon-12 b. carbon-13 c. carbon-14 d. nitrogen-14 e. nitrogen-15
While sitting outside at a picnic, you and your family start discussing how hot it is outside and plan to take a dip in the lake to cool off. What type of heat have you experienced in order to make this statement?
A) kinetic heat B) sensible heat C) latent heat D) potential heat
What is the life span of a red blood cell?
A) 2 weeks B) 1 month C) 4 months D) 1 year
The more than 300,000 plant species with conductive tissues and material flow systems to absorb nutrients and water are known as
A) cyanobacteria. B) blue-green algae. C) bryophytes. D) vascular plants. E) xerophytes.