The conversation continues..."What!"exclaims Jack. "How do you know?"
Mark explains, "Mass is a quantity of matter that can be measured."
"What's Matter?" Jack asks.
"Matter is a substance that has mass and takes up space." Mark continues.
"How can the definition of mass be matter and the definition of matter be mass? You can't define one with the other it doesn't make sense!" Jack states confused.
"What about air?" Jack asks
Mark states, "What do you put in a balloon when you blow it up? Air! See Jack it takes up space."
The light bulb clicks on, "OH! So when I asked Mr Ochoa, 'what if we cannot find anything to bring in?' he responded 'your on the right track Jack' that's what he meant!"
What a lesson in science we had! I was a proud mama sitting there listening to my boys actually having a conversation, without fighting, yelling or hitting. My babies are growing up.