Scientific Method
What is the equation for density?
What is density=mass/volume?
Is a compound a pure substance or mixture?
What is a pure substance?
What are the three subatomic particles?
What are protons, neutrons, and electrons?
Define chemical reaction
What is one or more substances changing into one or more new substances?
How is a problem written? How is a hypothesis written?
What is as a question? What is as an if-then statement?
What process needs to be done to find the volume of an irregular object?
What is the water displacement method?
What type of change is burning wood?
What is a chemical change?
What is the atomic number for oxygen?
What is the number 8?
Define combustion reaction
What is a reaction that is a hydrocarbon + oxygen yields water + carbon dioxide?
What is a dependent variable?
What is a variable that is measured?
What is 3 L?
What are physical properties?
What is the name of HCl?
What is hydrogen chloride?
Balance the following equation by listing the coefficients from left to right.
H2 + O2 --> H2O
What is 2, 1, 2
What is a control group?
What is a part of an experiment that is used to compare the change the independent variable has on the dependent variable?
Convert 45kg to g.
What is 45,000 g?
What are the two parts of a solution?
What are solutes and solvents?
Write the chemical formula for Lithium Sulfide?
Identify the following reaction type:
NaF + HCl --> HF + NaCl
What is double replacement?
A student wants to know if a mechanical pencil will write more words than the normal wooden pencil they use. If the student was to conduct an experiment, what would be the independent variable? What would be the dependent variable?
What is type of pencil? What is amount of words?
A cube with 3 cm sides has a mass of 50g. What is the density of the cube?
1.85g/cm3
What happens to the speed of particles as temperature increases?
What is speed increases?
What happens to the reactivity of elements as you read down a group on the periodic table?
What is reactivity increases?
Is an ice cube melting endothermic or exothermic?
What is an endothermic reaction?