Chemical Reactions
During a chemical reaction, what happens to the atoms of different molecules?
They are broken down and rearranged into new substances.
How do scientists detect tsunamis as they occur?
Buoys attached to underwater sensors, linked to satellites that transmit water data to shore.
Are atoms created or destroyed during a chemical reaction?
No
What is the Law of Conservation of Matter?
Matter cannot be created or destroyed.
Where on Earth is it most likely for tsunamis to form?
Ring of Fire, Mediterranean Sea
What properties of gas helped us narrow down our options to Carbon Dioxide during the bath bomb reaction?
Density - it sank, was more dense than air
Flammability - it extinguished the match, was not flammable
What are 3 signs that a chemical reaction may have occurred?
Color change, gas production, temperature change, light production, taste change, smell production, etc.
What three factors typically need to be present for a tsunami to form?
What are the 3 subatomic particles that make up an atom?
Protons - positive charge
Neutrons - neutral charge
Electrons - negative charge
If a chemical reaction occurs in a sealed space as opposed to an open container, what will happen to the mass of the substances?
They will stay the same.
For 50 points each, list all 8 tsunami mitigation techniques WITHOUT looking in your journal.
Seawall, levee/sea dike, recurve wall, submerged breakwater, rock armor, tetrapods, mangrove forest, pine forest
If we consider a molecule of Hydrogen Peroxide (H2O2), how many atoms make up a single molecules? If I rewrite the chemical formula like this: 5H2O2, how does that change the representation of Hydrogen Peroxide?
Atoms in a single molecule: 4, 2 Hydrogen and 2 Oxygen
The large 5 means that there are 5 complete molecules of Hydrogen Peroxide
Why ISN'T salt dissolving in water an example of a chemical reaction?
Because the salt and the water are still separate molecules, no rearranging of atoms is taking place and no new substances are created.
When designing a solution for the town of Ryoishi, what engineering criteria must the design meet?
When scientists repeated John Dalton's experiments with water, what provided evidence that a water molecule had 2 Hydrogen atoms instead of just 1.
They noticed gas bubbles being produced at different rates, one was produced twice as fast as the other, leading them to conclude that there were twice as many hydrogen atoms as oxygen.