Scientific Method
The _________ variable is the one that is changed or adjusted by the scientists.
Independent
A ______ in our bodies produces a response
stimulus
Matter is anything that has _______ and takes up _______
1. mass
2. space
Water is a ________ molecule.
Polar
Water can _______ and break apart
ionize
How many steps are in the Scientific Method?
7
What is described as chemical reactions breaking down & building up materials
metabolism
All matter is made of _______.
atoms
___________ bonds exist between water molecules.
__________ bonds connect hydrogen atoms to the oxygen atom.
1. Hydrogen
2. Covalent
pH is a measure of the amount of ______________ in a solution
hydrogen ions (H+)
In order to set up a controlled experiment:
A Hypothesis must be ___________.
Experiment tests only __________ variable.
1. testable
2. one
What is the state where we are maintaining internal conditions despite changes in the external environment?
Homeostasis
What is a substance that is entirely made out of one type of atom?
Element
The hydrogen atom in one water molecule which is _______ charged is connected to an oxygen atom in another water molecule which is _________ charged
positively; negatively
REMEMBER OPPOSITES ATTRACT!
Acids ________ H+ ions in solution
Bases ________ H+ ions in solution
release
take out
In our fishing example.... the length and weight of the fish we catch is _____________ data and the color and texture of the fish is ___________ data.
1. quantitative
2. qualitative
Our DNA contains _______ for characteristics of offspring
codes
Atomic number is the number of ___________.
Atomic mass is the number of ______ + the number of ________
1. protons
2. protons + neutrons
Sand and water is an example of a ____________
Flour in water is an example of a ____________
Salt in water is an example of ______________
Blood is an example of ______________
1. Mixture
2. Suspension
3. Solution
4. Solution & Suspension
pH of the body must be kept at ____________
6.5-7.5
There is 3 reasons why we publish results for our experiments... name all 3.
1. Share results with others
2. Compare results
3. Allow others to redo experiment
Organisms can either be single celled or multicellular. Multicellular organisms show ___ _____________.
cell specialization
Atoms have either lost or gained an electron in what type of bond?
Ionic
Name the 4 properties of water covered in our notes
1. Cohesion - same molecules stick together
2. Adhesion - different molecules stick to other surfaces
3. Good solvent - dissolves many things
4. Expands when frozen
The pH of our stomach acid is_____
The pH of Sea Water is ______
The pH of drain cleaner is _______
1
8
14