Which of the following is not one of the three basic types of materials emitted when a volcano erupts?
a. Lava
b. Breccia
c. Gas
d. Pyroclastics
b
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What is the most diverse and inclusive classification group?
a. domain b. genus c. kingdom d. phylum e. species
The force of a falling apple hitting the ground depends upon
A) the speed of the apple just before it hits the ground. B) the time of contact with the ground. C) whether or not the apple bounces. D) all of the above
A solid sphere, a solid cylinder, and a hoop each have the same mass and radius. If they are spinning at the same angular velocity, which one has the greatest angular momentum?
a. the sphere b. the cylinder c. the hoop d. They all have the same angular momentum.
The Framingham Study and the two lung cancer studies are examples of retrospective cohort studies that followed large numbers of people over extended periods of time.
a. true b. false