Matter & Models
These appeared when the bath bomb was added to water and contained a gas.
What are bubbles?
Matter has this and takes up space.
What is mass?
This is a single type of matter with its own set of properties.
What is a substance?
A gas that is less dense than the surrounding air moves in this direction.
What is upward?
The elephant’s-toothpaste investigation used potassium iodide, soap, and this liquid mixture.
What are hydrogen peroxide and water?
Solids, liquids, and gases are all forms of this.
What is matter?
In this type of system, matter cannot enter or leave.
What is a closed system?
Color, odor, density, melting point, and solubility are examples of these.
What are properties?
At high concentrations, gases described as non-flammable in our data table do this to a flame.
What is extinguish it?
This pair was the only combination that produced many bubbles.
What are hydrogen peroxide and potassium iodide?
All matter is made of these tiny pieces, even when they cannot be seen.
What are particles?
In this type of system, matter can enter or leave.
What is an open system?
Lemonade mix is classified as this because it contains more than one substance.
What is a mixture?
Room air and helium served this purpose during the gas tests.
What are controls?
The bubbles and rattling stopper provided evidence that this formed inside the flask.
What is a gas?
Scientists use this representation to explain what may be happening at a scale too small to see.
What is a model?
The mass of the capped bath-bomb bottle stayed the same before and after the reaction for this reason.
What is “no matter entered or left the closed system”?
When the bath-bomb substances were individually added to water, this did not happen.
What is the formation of gas bubbles?
The bath-bomb gas moved downward and put out a flame, showing it had these two properties.
What are denser than air and non-flammable?
The measured mass decreased after the ingredients were mixed for this reason.
What is “gas formed and escaped from the partially open system”?
At the beginning of the unit, we considered two explanations for the gas: it was trapped inside the bath bomb or it did this from the starting matter.
What is formed?
After the bottle was opened, its measured mass decreased because this matter left the system.
What is gas?
These three substances had to be combined to produce the bath-bomb gas.
What are baking soda, citric acid, and water?
These three gases remained possible candidates for the bath-bomb gas after the density and flame tests.
What are nitrogen, argon, and carbon dioxide?
The gas made a glowing ember burst into flame. Name three gases or mixtures that this evidence rules out.
What are any three of nitrogen, argon, carbon dioxide, neon, helium, and air?