Sand build up. Over time, the sand particles As streams flow through Stone Mountain, layers of
form a sedimentar
rock called sandstone.
What causes sandstone to change into metamorphic rock at Stone Mountain?
O Sandstone is reshaped by erosion from a stream.
O Sandstone builds up layers of sand at the mountain.
O Sandstone has more sand particles compacted on top of it.
• Sandstone experiences
Answer c

heat or electricity in the atmosphere- c.

plants need sunlight, water, and carbon dioxide to make food. plants use the raw materials of water, nutrients they absorb from soil, and carbon dioxide to make sugars the plant can use. energy from the sun and chlorophyll are also needed.

considering the question as per the attachment

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.