Sand or gravel that naturally forms near Earth's surface is known as
A. pollen.
B. ore.
C. aggregate.
(D. bedrock.)
When new clay sediment is deposited on top of old beach material, it's known as
A. regression.
(B. transgression.)
C. progression.
D. aggression.
To find the answer to the first question, we need to understand the given options and their definitions.
A. Pollen: Pollen refers to the powder-like substance produced by flowering plants for the purpose of reproduction.
B. Ore: Ore typically refers to a naturally occurring mineral or rock that contains valuable substances, such as metals, that can be extracted and used for industrial purposes.
C. Aggregate: Aggregate is a term used to describe a combination of sand, gravel, crushed stone, or other types of particles used in construction or as a foundation material.
D. Bedrock: Bedrock refers to the solid rock layer that lies beneath the soil, sediment, and other loose materials on the Earth's surface.
From the given options, it is clear that the correct answer is C. Aggregate, as it specifically describes the natural formation of sand or gravel near Earth's surface.
Now let's move on to the second question:
A. Regression: Regression refers to the process of something moving back or retreating to a previous state or position.
B. Transgression: Transgression, in geology, refers to the process of new sediment being deposited on top of older sediment, resulting in the sea level rising and shoreline advancing inland.
C. Progression: Progression typically refers to the process of moving forward or advancing.
D. Aggression: Aggression refers to hostile behavior or actions intended to cause harm.
Based on the definitions provided, the correct answer for the second question is B. Transgression, as it specifically describes the deposition of new clay sediment on top of older beach material.