Nature of Science
What is a Hypothesis?
A testable prediction based on observations (more than a guess!!)that describes a cause and effect relationship between variables
What is water?
A molecule made of 2 atoms of hydrogen covalently bonded to 1 atom of oxygen.
What is a macromolecule and name 4.
A macromolecule is a large organic molecule (carbon containing) that makes up all living things.
4 examples are:
Nucleic acids, proteins, carbs, and lipids.
What is the phospholipid bilayer?
2 layers that make up the plasma membrane of our cells.
What is a control group?
A group used for comparison with your experimental groups. This is the “normal” group.
What is the difference between precise and accurate?
Accurate is how close your measurement is to the correct/accepted value.
Precise is how close your measurements are to each other.
what is the difference between something that is Polar and Nonpolar?
A polar molecule is Unequal distribution of charges.
A nonpolar molecule is no separation of charge, so no positive or negative poles are formed.
What is the difference between a monomer and a polymer?
A monomer is a small, basic sub-unit.
–Think about a brick
A polymer is a larger more complex structure made of monomers
–Think about a brick wall
What is Adhesion?
The type of attraction that happens between two different molecules.
–Glass, soil, plant tissue, cotton, etc.
What is high specific heat?
The temperature of water does not change easily.
What is the difference between an independent variable and a dependent variable?
Independent is what the experimenter will deliberately change or manipulate in the investigation.
Dependent is what changes in responseto the independent variable.
What is a solution, solute, and solvent?
A solution is a uniform mixture of two or more substances. (lemonade)
A solute is what gets dissolved. (lemonade powder)
A solvent is what does the dissolving. (water)
What is the monomer and polymer of nucleic acids?
Monomer=Nucleotides
Polymer=nucleic acid
What is matter?
Anything that has mass and occupies space.
What is the monomer and polymer of Proteins?
Monomer=Amino acids
Polymer=Polypeptide
What is the difference between qualitative and quantitative?
qualitative is when it describes the quality of something.
quantitataive is when it uses numbers to measure something.
What are the properties of water?
Cohesion
Adhesion
High specific heat
Less dense as a solid
Water is a terrific solvent
What is the monomer and polymer of carbs?
Monomer=monosaccharides
Polymer=polysaccharides
What is a principle?
A statement based on repeated experimental observation that describes an aspect of the world.
What is the main function of Nucleic acids?
They are informational molecules that store, transmit, and express our genetic information; instructions for making proteins.
What is the difference between Inference and observation?
Observation is the description of something you can see, smell, touch, taste, hear.
Inference is a guess about an object or outcome based on your observations.
What is the difference between hydrophilic and hydrophobic?
A hydrophobic Does not have an affinity for water
–Water “fearing”
–Does NOT dissolve in water
A hydrophilic Has an affinity for water
–Water “loving”
–Usually dissolves easily in water
What is the monomer and polymer of lipids?
Monomer=fatty acids
Polymer=triglycerides
What is an experimental group?
groups that are being tested
True or False: Proteins have the most energy storage?
False, lipids do.