ANSWER: Correct Chapter 1 Question 7 Â­ True/False Part A A scientific theory is a tentative or untested explanation that is proposed to explain scientific observations. This preview has intentionally blurred sections.
Gravel /ËÉ¡rÃ¦vÉl/ is a loose aggregation of rock fragments. Gravel is classified by particle size range and includes size classes from granule- to boulder-sized fragments. In the Udden-Wentworth scale gravel is categorized into granular gravel (2 to 4 mm or 0.079 to 0.157 in) and pebble gravel (4 to 64 mm or 0.2 to 2.5 in).
The particles from largest to smallest. are gravel, sand, silt, and clay. Gravel can be as big as a boulder. (>256 mm) or as small as a granule. (2-4 mm). Silt (0.00039-0.0625mm) and clay (0.0002-0.0039mm) are. very tiny particles that are generally.