When liquid gold becomes a solid, its particles get closer together. which best describes what happened to the gold?
a) the conservation of magnetism
b) the change in solubility in a physical change
c) the change in melting point in a physical change
d) the rearrangement of particles in a physical change

Option D

Explanation:

The phenomena where liquid gold on getting converted to solid undergoes a change where the particles get closer to each other shows that the particles of gold undergoes rearrangement which is a physical change.

In liquids, the inter-atomic spacing is more and the particles in liquid are loosely packed.

Moreover, liquids do not have a fixed shape and takes the shape of its holder due to the loose arrangement or packing of its particles.

Whereas the particles in solid are oriented or arranged in such a way that the inter-atomic distances between the particle is very less and the particles are tightly packed giving it a robust and fixed structure and shape. This re-arrangement is a physical change.

i had this question and the answer was 3.15 miles.

martina travels from school to her mom's office. from there, she walks to school. after school, she walks to the library and then to a friends house before finally ending back at home. find martina's total distance traveled.

a) 0 miles  

b) 0.4 miles  

c) 1 mile  

d) 3.15 miles