COMPREHENSIVE QUESTIONS AND
ANSWERS
◉can you undo a physical change. Answer: yes
◉can you undo a chemical change. Answer: yes but it is very very
difficult
◉energy. Answer: the capacity to do work
cal
joule
kilowatt kwh
◉law of conservation of energy. Answer: energy is never created or
destroyed
◉temperatures. Answer: measure of thermal energy
k, c, f
, ◉heat. Answer: transfer of thermal energy
joules j
◉specific heat capacity. Answer: quantity of heat required to change
the temperature of a substance
◉g=mc change in t. Answer: specific heat capacity
◉atom. Answer: Smallest particle of an element
◉element. Answer: A substance that cannot be broken down into
simpler substances
◉daltons theory. Answer: -each element is composed of atoms
-all atoms of the same element have the same mass and properties
-atoms combine in whole number ratios to form compounds
◉protons. Answer: Positively charged particles
◉neutrons. Answer: no charge
◉protons and neutrons make up the. Answer: nucleus