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 density of gravel varies depending on many many things. For one there is packed and loose density. Next the density varies much of how many fines and coarses (sand and â¦ rock) are in the gravel mixture. There are many ways to find the density of gravel but takes a little know how.The density of gravel varies depending on many many things. For one there is packed and loose density. Next the density varies much of how many fines and coarses (sand and â¦ rock) are in the gravel mixture. There are many ways to find the density of gravel but takes a little know how.