Scientific Method Quiz
The variable that stays the same throughout the experiment.
What is the controlled variable?
Emergency tool meant to be used if a student catches on fire. (2 correct answers)
An atom that carries an electrical charge.
What is an ion?
Substance made of atoms of two or more different elements that are chemically combined.
What is a compound?
The smallest unit of a substance that keeps all of the physical and chemical properties of that substance.
The variable that is affected by the other variables.
What is the dependent variable?
Angle a test tube is meant to be held from face.
What is a 45 degree angle?
An atom with a negative charge.
What is an anion?
Table sugar is C₁₂H₂₂O₁₁. How much C, H, and O?
12 C; 22 H; 11 O
A combination of compounds.
What is a mixture?
The variable that is purposely changed to affect an experiment.
What is the independent variable?
The amount of time eyes are meant to be cleansed after coming in contact with chemicals.
What is 20 minutes?
An atom with a positive charge
What is a cation?
Combination of chemical symbols and numbers to represent a substance, shows how many atoms of each element are in a unit of a substance.
Chemical Formula
T/F Elements always combine to make specific compounds in the same proportions.
True
Put the steps of the scientific method in order:
Test the hypothesis, make a hypothesis, do research, review data, ask a question, share results
Ask a question, do research, make a hypothesis, test the hypothesis, review data, share results.
What does PASS stand for?
P-Pull the pin
A-Aim at the base of the fire
S-Squeeze the trigger
S-Sweep the hose
Two atoms with different numbers of neutrons, but the same number of protons.
What are isotopes?
When substances doesn't mix uniformly and aren't evenly distributed.
What is a heterogeneous mixture?
Mixture that is uniform throughout.
What is a homogeneous mixture?
Determine the type of data:
The paper used in the experiment was white.
What is qualitative data?
When taking recently heated glassware, you should clean it in:
What is warm water?
The current model of the atom.
What is the Electron Cloud Model?
Pure substances (not specific; 2 answers)
What are elements and compounds?
T/F: Every compound is exactly the same as each individual element it contains.
False