Module 1
A well tested explanation of a phenomenon in the natural world.
What is scientific theory?
The smallest unit of a chemical compound, composed of two or more atoms bonded together.
What is a molecule?
The number of protons in an atom.
What is the atomic number?
A force of attraction between atoms or a group of atoms due to the sharing or transferring of electrons.
What is a chemical bond?
A possible, testable explanation for one or more observations or a suggested, testable answer to a question.
What is a hypothesis?
A branch of the natural sciences, and deals with the study of nonliving things.
What is physical science?
Anything that has mass and takes up space.
What is matter?
The number of protons and neutrons in the nucleus of an atom.
What is the mass number?
A molecule that has slight positive and negative charges due to an imbalance in the way electrons are shared.
What is a polar molecule?
The smallest chemical unit of an element.
What is an atom?
The gathering of information using senses or with the aid of instruments.
What is observation?
A pure substance that cannot be broken down into a simpler substance and contains only one type of atom.
What is an element?
Electrons that are in the highest energy level of an atom of an element.
What are valence electrons?
The force of attraction between molecules of the same substance so that they tend to stay together.
What is cohesion?
An investigation in which the factors that influence the outcome are kept the same except for one - the factor being studied.
What is a controlled experiment?
A factor that can change in an experiment.
What is a variable?
A pure substance that contains two or more elements chemically joined in a fixed proportion.
What is a compound?
The charge of a proton.
What is a positive charge?
An atom or a group of atoms that has a positive or negative charge.
What is an ion?
The state of matter in which a substance has a definite shape and a definite volume.
What is a solid?
A well tested description of one phenomenon in the natural world that often includes mathematical terms.
What is scientific law?
The ratio of a substance's mass to its volume.
What is density?
States that matter cannot be created or destroyed.
What is the law of conservation of mass?
The force of attraction between molecules of different substances so that they tend to stick together.
What is adhesion?
The greatest part of the mass of an atom is found here.
What is the nucleus?