Chemistry
What are the 3 most common states of matter?
Solid, liquid, gas
Is water an acid, base or neutral? and what is its pH
Neutral with a pH of 7
What was the base layer of our density tower? and why was it our base layer?
Syrup due to its density
What is the scientific method used for?
a process for experimentation that is used to explore observations and answer questions.
Name some issues with super strength? *remember our hypotheticals*
- you'd could break things easily
- you couldn't control your own strength
etc.
What is the definition of Chemistry?
The study of matter and how that matter undergoes change.
What are some characteristics of an acid? What color does it produce when mixed with an indicator?
chemicals that have a pH less than 7 (0-6).
Corrosive
Give off H+ ion in water
Turns the litmus/indicator red
What was the liquid that we mixed with water to burn money/the cloth?
Alcohol
Define Hypothesis
a testable explanation
Name two problems with super speed?
- cuts/ burning up due to friction
- bursting through things/people by going to fast
What are two types of change that occur in chemistry and how are they different?
Chemical and Physical
What are some characteristics of a base? What color does it turn and indicator?
chemicals that have a pH greater than 7 (8-14).
Typically soapy in nature
Give off OH- ions in water
Turns litmus/indicator paper blue
What was the base that we used in our balloon lab to see acid/base reactions?
Baking Soda
Explain the order of the scientific method
2) Hypothesis
3) Procedure
4) Observations
5) Conclusions
Ammonia is an example of a what?
Base
Name 3 indicators that a chemical change has occured?
There is a formation of gas which can be seen by a fizzing or bubbling
The reaction will cause heat, light or odor to be emitted
A color change is produced
Vinegar is an example of what?
Acid
What was the gas produced in our balloon lab?
CO2, known as carbon dioxide.
What is the first thing we should do as a part of our procedure?
List materials
Define Density
degree of consistency measured by the quantity of mass per unit volume (the amount of stuff that fits into a certain space)
Name every part of the atom. (What are the three subatomic particles we discussed and where they are located)
Protons, neutrons and electrons
This sometimes produces an OH- ion
Base
What kind of change occurred during our balloon lab and how do we know?
Chemical due to the emission of a gas.
What century was the scientific method invented in?
13th (1200s)
Why did the middle layers of milk, soap, and water mix together while the oil and syrup stayed separate?
They had similar densities.