What is the relationship between abrasion and the hardness of a rock mineral?

Hardness (H) is the resistance of a mineral to scratching. The degree of hardness is determined by observing the comparative ease or difficulty with which one mineral is scratched by another or by a steel tool.

Explanation:

https://www.britannica.com/science/mineral-chemical-compound/Hardness Hope this helps

1)

i))the process of preparing food by green plants in the presence of sunlight is called photosynthesis.

ii) leaf is the site for photosynthesis.

iii) it takes place as,

6h2o+6co2=c6h12o6+602

answer; convade;