Any factor that changes in an experiment
What is variable?
Anything that has mass and takes up space
What is matter?
This scientist was the first to argue that all matter was made from indivisible particles called atoms
Who was Democritus?
Substances that undergo a chemical change
What are reactants?
Atoms of an element with the same number of protons but different number of neutrons (Module 3)
What are isotopes?
A tentative explanation for an observation
What is hypothesis?
A pure substance that cannot be broken down into a simpler substance and contains only one type of atom
What is element?
The number of protons in an atom
What is atomic number?
A force of attraction between atoms or groups of atoms
What is a chemical bond?
Electrons that are in the highest energy level of an atom (Module 3)
What are valence electrons?
Observations made by using the 5 senses
What is qualitative observation?
The ratio of a substance's mass to its volume
What is density?
DAILY DOUBLE
The scientist that provided evidence for the existence of a dense, positively charged nucleus in the center of an atom
Who is Ernest Rutherford?
An atom or a group of atoms that has a positive or negative charge
What is ion?
DAILY DOUBLE
The physical property of a liquid to resist flowing is called
What is viscosity?
Conclusions based on observations, previous knowledge, and available information
What is inference?
The smallest unit of a chemical compound composed of two or more atoms bonded together
What is molecule?
The subatomic particle that has a negative charge
What is electron?
A notation indicating the elements in a compound and the ratios of the atoms of each element
What is chemical formula?
A homogeneous mixture made by dissolving one substance in another (Module 2)
What is solution?
DAILY DOUBLE!
An investigation in which the factors that influence the outcome are kept the same except for one, the factor being studied
What is controlled experiment?
Movement in gases and liquids that spreads out of particles
What is diffusion?
Matter cannot be created or destroyed, but it can change forms
What is Law of Conservation of Mass?
A chemical bond formed between oppositely charged ions
What is ionic bond?
A well-supported, in-depth explanation of a broad range of phenomena
What is scientific theory?