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 most common use for gravel is on driveways. There are different types of gravel, but the most common type is limestone gravel. It is white in color and is of a medium size. For this type of gravel, the average cost is $15 a ton, including delivery.Other types of gravels range in price from $10 per ton with delivery to $60 per ton with delivery. Some areas, especially those close to the materials used to make the gravel, will have a cheaper average price than other areas.he most common use for gravel is on driveways. There are different types of gravel, but the most common type is limestone gravel. It is white in color and is of a medium size. For this type of gravel, the average cost is $15 a ton, including delivery.