Pumping Heart
What organ in your body pumps blood?
heart
100: What two ingredients react in the lemon volcano experiment to make it fizz?
lemon juice and baking soda
What kind of liquid can you use as invisible ink?
lemon juice or milk?
What does the salt do in the ice cream experiment?
lower the freezing point of ice?
What common school supply is used to make slime?
Glue
What do we use to model the valves in the pumping heart activity?
Balloons
What gas is produced during the lemon volcano reaction?
carbon dioxide?
What reveals the invisible ink?
heat (like a lamp or iron)
Why do we shake the bag in the ice cream activity?
To mix and freeze the cream evenly
What ingredient is added to glue to turn it into slime?
Borax
What does the red-colored liquid in the heart activity usually represent?
Valves
Why does the reaction in a lemon volcano appear bubbly and foamy?
because carbon dioxide gas gets trapped in the liquid, creating bubbles
Why does lemon juice turn brown when heated?
it oxidizes and burns slightly
What state of matter does the cream start and end as?
it starts as a liquid and ends as a solid
What makes slime stretch instead of break apart when you pull it?
Polymer structure
What are the "containers" in the heart called?
Chambers
What type of chemical reaction is happening in the lemon volcano?
acid-base reaction
What property of the liquid makes it "invisible" when it dries?
it dries clear because it's colorless and thin?
What happens to the temperature of the ice when salt is added?
it drops below 0°C (freezes colder)?
what happens if you add too much activator (like borax) to the slime?
It becomes stiff and rubbery
Why are valves in the heart important?
To prevent backflow of blood?
If you wanted to make the lemon volcano erupt more strongly, what could you add
more baking soda or dish soap to trap more gas
What kind of chemical reaction happens when invisible ink appears with heat?
oxidation or a combustion-like reaction?
Why can adding salt to ice help make ice cream freeze faster?
because it creates an endothermic reaction, pulling heat from the cream?
Non newtonian fluid