Scientific Method and Theory Quiz

What is the primary purpose of the scientific method?

• To ask a question and conduct experiments to draw conclusions

• To randomly assign participants to groups

• To describe a hunch or guess

• To measure the mass of an atom

What is a randomized controlled trial?

• A study that measures the atomic mass of elements

• A study that compares the effectiveness of different treatments

• A method to describe everyday theories

• A process to determine protein structure

How does a scientific theory differ from an everyday theory?

• Scientific theory is based on speculation; everyday theory is based on evidence

• Scientific theory is a well-established explanation; everyday theory is a guess

• Scientific theory involves random assignment; everyday theory involves testing

• Scientific theory measures atomic mass; everyday theory measures atomic number

What is an independent variable in an experiment?

• The factor that is manipulated by the researcher

• The factor that is measured as a result of changes

• The total mass of an atom

• The number of protons in an atom

What does the atomic number of an element represent?

• The total mass of an atom

• The number of protons in its nucleus

• The number of electrons orbiting the nucleus

• The strength of covalent bonds

What is an ion?

• An atom or group of atoms with an electric charge

• A molecule with a covalent bond

• A protein with a unique shape

• A phospholipid with hydrophilic heads

What is a covalent bond?

• A bond where electrons are shared between atoms

• A bond where electrons are completely transferred

• A bond involving hydrogen atoms

• A bond that measures atomic mass

What determines the function of a protein?

• Its unique three-dimensional shape

• The number of protons in its nucleus

• The type of covalent bonds it forms

• The arrangement of phospholipids

What is the structure of a cell membrane?

• A phospholipid bilayer with hydrophilic heads facing outwards

• A single layer of proteins with hydrophobic tails

• A structure with covalent bonds between atoms

• A nucleus surrounded by electrons