Which of these actions is an example of erosion caused by gravity? A.
​​​​Constant freezing and thawing water forming a hole in an asphalt road​​​​​

B.
​​​​​​Pieces of rock breaking off and falling from a mountain top

C.
​​​​​​​Chemicals in the air dissolve minerals in a marble statue​​​​​​​

D.
Plant roots widening cracks in a large granite rock

Write the formula for the following chemicals. 7. e. trinitrogen tetraoxide a calcium phosphate f. magnesium acetate b. potassium sulfide g nickel(iii) cyanide c carbon dioxide h. silver sulfate d. cobalt(ii) chloride

How have the greenhouse gasses increased from the year 2000 to 2018

Which ocean zone has the most abundant primary producer and why a) the abyssopelagic zone ,du to the absence of light and cold water temperatureb) the bathypelagic zone, due to the absence of light and cold water temperaturec) the mesopelagic zone ,due to uts high light availability and warm water temperature d) the epipelagic zone,due to its high light availability and warm water temperature