List the 3 building blocks of an atom with their respective charges?
What are electrons (negative), neutrons (neutral), protons (positive)
100
List the 4 states of matter in order from lowest to highest energy
Solid, Liquid, Gas, Plasma
100
Which is more dense, a fun size chocolate bar or a king size chocolate bar?
Same
100
List all endothermic phase changes including what they change from and into.
Melting (solid to liquid)
Evaporation (liquid to gas)
Sublimation (solid to gas)
100
Draw a Venn Diagram relating elements, molecules, and compounds.
See teacher.
200
The proton tells you ______________ about an atom.
the identity (the atomic number)
200
Liquids have a _________________________ volume and _______________________ shape
fixed, variable
200
Why does filling your lungs with oxygen making you float in water?
It increases your volume with little added mass so you are less dense
200
An exothermic phase change ____________________ energy. Three examples are:
Gives
Freezing
Condensation
Deposition
200
True or False: The molecules within a mixture are chemically bonded.
False.
300
The mass number is found by adding _______________________________________ and it is a decimal on the period table because __________________________________
Number of protons and neutrons.
It is an average of all the isotopes of the element.
300
Describe how a liquid nitrogen's kinetic and potential energy compare to solid nitrogen and gaseous nitrogen.
Liquid nitrogen has higher kinetic and lower potential than solid nitrogen
Liquid nitrogen has lower kinetic and higher potential than gaseous nitrogen
300
Would someone with double the mass need double the sun screen?
No, a larger person has less surface area (skin) per pound.
300
When changing phases, you substances give or take energy in the form of:
Heat
300
Alka Seltzer dissolving in water is a physical change.
False.
400
How many neutrons do most oxygen atoms have? What do you think is the second most popular isotope for oxygen?