NATURE OF SCIENCE
In an experiment, the variable that is deliberately changed by the scientist is called what?
IV
What subatomic particle has a positive charge?
Proton
Water molecules are described as polar because they have what?
Unequal distribution of charge
Which macromolecule includes sugars and starches?
Carb
What is the difference between an observation and an inference?
An observation is something you directly see/measure; an inference is an interpretation or explanation based on observations.
The variable that is measured or observed as a result of the experiment is called what?
DV
Where are protons and neutrons located in an atom?
Nucleus
What property of water allows ice to float on liquid water?
Ice is less dense
Which macromolecule is made from amino acids?
Protein
A student claims, "Plants grow faster because they receive more sunlight." What is wrong with this statement if it is supposed to be a hypothesis?
It does not clearly state a testable prediction/relationship between an IV and DV.
A student keeps the amount of water, type of soil, and type of plant the same while changing the amount of sunlight. What are the water, soil, and plant type?
Constant
What is the name of an atom that has LOST an electron?
Cation
Why does oil fail to mix with water?
Oil is hydrophobic and nonpolar
What are the monomers of nucleic acids?
Nucleotides
Which statement best explains why an atom is electrically neutral?
Protons = Electrons
A student says, "The plant is 15 cm tall."
What describes this statement?
Quantitative Observation
What are the name of the particle located in the outer most energy shell of an atom?
Valence Electrons
What property of water allows organisms to survive beneath frozen surfaces in polar environments?
Ice is less dense as a solid
What type of reaction joins smaller molecules together to form a larger molecule?
Dehydration Reaction
What type of reaction uses water to break a polymer into smaller molecules?
Hyhdrolysis
Five students measure a pencil and get almost exactly the same measurement, but their measurements are far from the pencil's actual length. Are their measurements accurate, precise, both, or neither?
Precise, but not accurate
What particles determine the identity of an element?
Proton
What type of bond forms between the slightly positive hydrogen of one water molecule and the slightly negative oxygen of another?
Hydrogen bonds
A scientist discovers a molecule made of amino acids folded into a specific 3D shape. Changing the molecule's shape causes it to stop working properly. What macromolecule is this, and why is its shape important?
Protein- Shape determines function
What type of bond holds the hydrogen and oxygen atoms together within a single water molecule?
Covalent Bonds