Kinetic theory describes the motion of particles such as atoms, ions, and molecules. Which of the following statements is part of kinetic theory? A.
Particles can only collide with their container when they are in gas form.
B.
Particles can settle to the bottom of their container and stop moving.
C.
Particles generally avoid each other as they move.
D.
Particles can collide with each other and with the wall of their container.

When the earth was formed and cooled, why did nickel and iron end up in the center of the earth while basalt and granite ended up in the outer layers

Can someone me with questions 15 to 17 plz.

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.