DDT is banned in most countries but is still widely used for malaria control.
Answer the following statement true (T) or false (F)
True
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________ is a felsic igneous rock with a meringuelike vesicular texture, consisting of very small holes, created by small shards of volcanic glass
A) Scoria B) Obsidian C) Granite D) Pumice
An oxbow lake is a former meander that has become isolated from the rest of the river
Indicate whether the statement is true or false
When a mass of cold air collides with a mass of warm air, what happens?
A) The cold air rises above the warm air. B) The warm air rises above the cold air. C) The boundary between the two air masses keeps them separate, and they do not interact in any way. D) The cold air is warmed and the warm air is cooled by their mixing.
Which of the following is TRUE regarding asbestos?
a. improper removal of asbestos can cause further contamination of a building b. asbestos causes health problems only when it is eaten c. the level of asbestos in a building is affected by weather conditions d. HUD requires that all asbestos-containing materials be removed from all residential buildings