3. A log was burned in a fireplace. Light, heat, and sound were given off as the log burned (1 point) and crackled. After the fire went out, the log had been broken down into coals and ashes.

What type of change occurred and what evidence supports this type of change?

O A chemical change occurred because the atoms were rearranged into new compounds.
O A physical change occurred because the burning of the substance produced sound waves.
O A chemical change occurred because only the shapes and sizes of the particles were changed.
O A physical change occurred because the new substances can be changed back into the original substances.

Mass is the amount of matter in an object.  weight is the measurement of the pull of gravity on an object.  say for example, you travel to the moon which has a different gravitational field compared to the gravitational field of earth. (gravitational fields: earth = 1, moon = 0.165)  now when you are on the moon, the pull of gravity on you is different than on the earth. and as weight is the measurement of the pull of gravity on an object, that means yes, your weight can and will change on the moon.  however, on the moon, on earth or even on jupiter, the amount of mass inside of you remains the same. meaning your physical mass remains constant.  in conclusion it is possible for your weight to change as your mass remains constant. 

Idon't know hope someone you