A fire deliberately set close to an advancing fire to create a firebreak by using the updraft of the wildfire to draw the fire toward the main fire is called a(n) _______________
Fill in the blank with correct word.
ANSWER: back burn
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Caliche is a ____
A)layer of silica cement within a pedalfer B)layer of precipitated calcium carbonate in horizon B C)layer of rock between soil layers C and D D)deposit formed in alkali soils E)light colored layer of unstable minerals
Asteroids large enough to destroy most life on Earth have been documented to strike the planet in the past.
Answer the following statement true (T) or false (F)
The orientation of charts that placed north at the top and east was on the right was done by:
A) Claudius Ptolemy B) Eratosthenes C) Hypatia D) Hipparchus
A home-grown, sophisticated defense industry has become a major arms exporter and foreign exchange earner. This statement describes:
A) Turkey B) Lebanon C) Israel D) Jordan