Which one is of the following is not a step in the scientific method? a. Data b. Definition c. Experiment d. Observation

Respiration Equations?

Period number (row) is associated with ____________. a. Atomic number b. Electron shells c. Valence electrons d. Atomic mass

Sodium has 3 electron shells and 1 valence electron. It belongs in ___________.

What are the products of aerobic respiration? a. Glucose, water, and oxygen b. Water, oxygen, and glucose c. Carbon dioxide, water, and Energy d. Carbon dioxide, glucose, and water

What is a mixture?

What is control variables?

Observing physical properties of a substance _______ involve changing the structure of the atom(s). a. don't b. do c. could d. should

A _________ is made when two or more substances are contained, but not chemically bonded. a. compound b. molecule c. element d. mixture

What are the reactants of aerobic respiration?

What is a fair test?

What does the chemical symbol 'K' represent?