Answer: D). Most rocks are a mixture of minerals
Rocks are the natural substances these are the aggregate of one or more number of minerals. These minerals are responsible for chemical and physical nature of rocks. These are responsible for type of particles, texture of particles and overall rock structure. Example of rock having mineral aggregate is granite which is a combination of minerals like quartz, biotite and feldspar.
All depends on climate !!
The ancient Egyptians used the stars to tell when a flood was going to happen. Every summer a flood would happen but this also happened when the bright star Sirius rose before the sun.
Hope that helped ^^
The answer is urticaria (also known as hives).
Particle size of soil and aeration capacity play important roles in plant growth
