Observe the following image. How is physical weathering changing the sidewalk? large cracks in a sidewalk
© helt2 / iStock 2018
Question 5 options:

Sand carried by wind has caused the sidewalk to crack.

Wind has caused the rocks to shrink and crack.

Water has frozen in the cracks and broken the sidewalk apart.

Wind has lifted the sidewalk and cracked it.

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later

The correct answer should be "electrons orbit the nucleus in circular motions exactly as shown on the classic bohr model."