Properties of Water
Adhesion, cohesion, evaporative cooling
What is energy?
The ability to do work.
What is the "universal solvent?"
WATER...because water is polar it makes for a very good solvent
DMV, D=M/V
Describe the difference between a hypothesis and theory?
Hypothesis can be supported or disproven and is only a possible answer to a question. A theory is a supported and sustained explanation.
What does hydrophobic mean?
water fearing/ hating
What type of energy is associated with motion?
Kinetic
What is the solvent?
What is in the higher quantity in a solution. It does the "dissolving"
What is the molecular mass?
Sum of all atoms in a molecule.
What do you call the number of independent observations you make in an experiment?
sample size
What kinds of substances/ molecules are hydrophobic? (characteristic)
nonpolar ex. oil
What is temperature a measure of?
thermal energy
What is a solution?
A homogenous mixture of liquid substances.
How many molecules are in one mole (mol)?
6.022x1023
From atom to biosphere list the levels or biological organization.
Atom>Molecule>Organelle>Cell>Tissue>Organ>Organ System>Organism>Population>Community>Ecosystem>Biosphere
Why is temperature more stable near large bodies of water?
Water has a high specific heat capacity because of its hydrogen bonds, so it takes a lot of energy to raise the temperature of water
What is specific heat?
The amount of energy needed to raise the temperature of 1g of a substance by 1 degree Celsius.
What term describes the concentration of a solution; amount of solute in a given amount of solvent.
Molarity
What is molar mass?
The mass of a substance (grams) divided by the amount of the subtance (moles).
units: g/mol
Eukarya, Archaea, and Bacteria.
Eukarya and Archaea are most closely related.
How does water dissolve substances that don't dissociate (dissociate meaning dissolving like how salt does)?
hydration shells formed by hydrogen bonds
What is a calorie? And for fun, what type of calorie do we use for food.
Calorie: the heat required to raise the temperature of 1g of water by 1 degree Celsius.
We use kilocalories (kcal) when we talk about energy from food.
What would happen if you placed a nonpolar molecule inside a polar solution?
They would not mix because "like dissolves like."
If I wanted to make a salt water solution with a concentration of 2.0 M (molarity) and I have 5.0 L (liters) of water, how many moles of salt do I need?
Molarity=mol/L
10 moles of salt
2.0M= ?mol/ 5.0L
(2.0)(5.0)= 10 moles
Name 3 of the 8 characterisitics of life.
DNA, Reproduction, Made of cells, Metabolism, Organization, Responds to environment, Growth and development, Shows evolutionary/adaptive potential