Bath Bomb
when we put a bath bomb in water?
Chemical reaction/bubbles/fizzes
MRE stands for?
Meals ready to eat
The starting materials in a chemical reaction
Reactants
How do we smell things?
Molecules from the substance enter our nose.
Criteria
The things needed for an object to be successful
When the bathbomb particles become to small to see in the water
Dissolved/dissolving
We use an MRE in these situations
Emergencies/can't use electricity, fire, or gas/military
The ending materials in a chemical reaction
Products
Detect odor
Constraint
Limits on an object doing its job
Baking soda, citric acid, water.
Problems with MREs include
Expensive/unavailable
Chemical reactions must have the same amount of atoms in the reactants that are in the products. True or false
True
Some things are odorless, why?
Their molecules do not fit into our olfactory receptors.
Atoms
Small particles of a substance that make up chemical reactions
The gas in the bath bomb is it new matter or was it always there?
Not new matter.
The MRE flameless heater involves two ingredients in a chemical reaction, what are they?
Magnesium and Salt
What is a chemical reaction
When atoms break apart and rearrange themselves to form new substances.
How many different combinations of smells can we detect?
trillions
Dissolve
A substance breaking down so small we can't see it.
The products of the bath bomb chemical reaction.
carbon dioxide, sodium citrate, water.
We decided on a chemical reaction for our homemade heater what are the ingredients?
Steel wool, vinegar, air
There are 5 signs that a chemical reaction has happened what are they?
Fizzing, producing a gas, change in mass, change in color, change in odor.
Why can some animals smell scents that we cannot?
They have different olfactory receptors.
Matter
Anything that has mass and takes up space.