What are soil colloids?
A. particles that are highly cohesive
B. only inorganic particles
C. particles smaller than 0.1 micrometer
D. only organic particles
E. particles that are chemically charged
C
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Mike stands at the edge of a cliff and throws one ball straight up and another ball straight down, both with the same speed. Neglecting air resistance, which ball hits the ground below with the greater speed?
A. The one thrown downward B. The one thrown upward C. neither, both hit with the same speed D. need more information
Graded bedding forms when ____
a. erosion planes off a portion of the sea bottom b. sediment is deposited on a steep slope or grade c. turbidity currents deposit first coarse-grained sediment then fine-grained sediment d. cross-bedding is truncated at top and curved (or tangential) at bottom e. turbidity currents deposit first fine-grained sediment then coarse-grained sediment
How is the geologic time scale sub-divided into smaller units?
A. Based on equal time intervals B. Based on the fossil record C. Based on major events in Earth history
Differentiate between the following solar system bodies: meteoroid, meteor, and meteorite
What will be an ideal response?