Chemistry
Earth Science
Climate Science
Water/more chemistry
Misc.
100
What does the number in the top right of a element mean?
It is the atomic number/total number of protons
100
What Era in earth's history lasted the longest?
Precambrian Era
100
Which is the greenhouse gas, CO2 or O2?
CO2
100
What method would you use to find the volume of a human?
water displacement method.
100
This variable in an experiment is the one that is intentionally changed to observe its effect on another variable.
What is the independent variable
200
How many bonds do each of these need: hydrogen, oxygen, nitrogen and carbon.
Hydrogen needs 1, Oxygen needs 2, Nitrogen needs 3, Carbon needs 4.
200
What geologic features and events does a convergent boundary form?
Mountains, volcanoes, and subduction zones.
200
What are the 3 states of matter and what decreases when turning from a liquid to a solid?
Solid, liquid, and gass
Volume decreases and mass stays the same
200
Which model of elements uses the chemical symbol with the number of valence electrons represented by dots?
Lewis Dot Model
200
What is the order of earths 4 eras?
Cenozoic, Mesozoic, Paleozoic, Precambrian
300
How would atoms form a covalent double bond?
Two atoms sharing two pairs of electrons
300
How did the moon form and how long ago was this?
4500 million years ago the moon formed from debris from a collision between earth and another rock
300
Name the levels of the atmosphere in order from bottom to top
troposphere, stratosphere, mesosphere, thermosphere
300
How can you determine the number of valence electrons in an element just by looking at the periodic table?
Look at the group (column #) that the element is placed in.
300
What is a polar covalent bond?
When two atoms with different charges share valence electrons unequally.
400
What is the difference between ionic and covalent bonds? Give an example
Ionic is a metal and a nonmetal while covalent is two nonmetals
Ionic: Sodium Chloride (NaCl)
Covalent: Water (H2O)
400
What is the main difference between prokaryotic cells and eukaryotic cells and which one came first?
The main difference between prokaryotic and eukaryotic cells is that prokaryotic cells are unicellular and eukaryotic cells are multicellular. Prokaryotic cells came first because of how much simpilier they were and how well they could survive.
400
What is DAC and what is done with the carbon it collects.
DAC is Direct Air Capture a process that takes carbon dioxide directly from the atmosphere. The carbon it collects is turned into pellets that get buried or is turned into a carbon neutral fuel.
400
Draw a diagram of C2 H6
H H
l l
H - C - C - H
l l
H H
400
If the diameter of field in the picture to the right is 500 µm then what is the size of each individual cell?
~55.5µm
500
Draw a HONC 1,2,3,4 diagram of the compound C2H5N
500
Order of the following events:
Formation of the Earth
Oldest rock
Pangea exists
Oldest evidence of life
First member of our genus appears
Formation of the moon
Great oxygenation event
Formation of the Earth
Formation of the moon
Oldest rock
Oldest evidence of life
Great oxygenation event
Pangea exists
First member of our genus appears
500
Sort these qualities to the right category:
Keeps heat in the atmosphere,
Lets heat out of the atmosphere, does not change shape
Molecules, changes shape
flat shape, non-polar covalent
triangle shape, does not change shape
polar-covalent, compounds,
Greenhouse Gases
Keep heat in the atmosphere
Compound
Triangle shape
Polar-covalent
Changes Shape
Non-greenhouse gases
Let's heat out of the atmosphere
Molecule
Flat shape
Non-polar covalent
Does not change shape
500
What are the 6 properties of water that make it essential for all life on earth?
High heat capacity, surface tension, cohesion, adhesion, universal solvent, and density of water in different states
500
Draw a covalent bond for molecular formula C1H2O3.
