What tool can be used to measure the motion of planets in our solar system?

A. Astrolabe

B. Microscope

C. Ruler

D. Compass

the answer is astrolabe

A. Astrolabe

(I don't have enough words, just ignore this)

in a chemical reaction, the atoms and molecules produced by the reaction are called products. no new atoms are created, and no atoms are destroyed. in a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.