Science Skills
This step of the scientific method involves using your senses.
What is making observations?
This is a mixture that appears to contain only one substance.
What is a homogeneous mixture?
J.J. Thomson's cathode-ray tube experiment showed this.
What is the fact that atoms contain negatively charged particles? (a.k.a. electrons)
This is why water has a higher boiling point than expected.
What is a strong attraction between polar molecules?
This law states that volume is proportional to the Kelvin temperature.
What is Charles' Law?
This is something that summarizes a pattern in nature.
What is a scientific law?
This phase change is the reverse of condensation.
What is vaporization?
Bohr's model of the atom shows that electrons move in this manner.
What is like planets orbiting the sun?
This is what the subscript "2" in MgCl2 represents.
What is two chloride ions for each magnesium ion?
When P1 = 140 kPa, and the volume is cut in half, what is P2?
What is 280 kPa?
When measuring time and you are looking at a group of clocks, the clock that has the greatest precision is like this.
What is the one with the most hands?
This is what happens to the temperature of a substance as it changes phase.
What is remaining constant OR not changing?
This is how you find the number of neutrons in an atom.
What is subtract the atomic number from the mass number?
This is what atoms are trying to achieve when they gain or lose electrons.
What is a stable electron configuration, or an octet?
A gas at 2 L of volume and 270 kPa of pressure is compressed to 540 kPa. This is the new volume of the gas.
What is 1 L (liter)?
This is when scientists examine the work of other scientists to check it for validity.
What is a peer review?
This is the property used to classify mixtures as solutions, suspensions, or colloids.
What is the size of the largest particles?
This is the maximum number of electrons that an atomic orbital can hold.
What is two?
This is the kind of ion defined as a covalently bonded group of atoms behaving as a single unit with an overall charge.
What is a polyatomic ion?
In a graph of mass versus volume, the slope of the graph represents this.
What is density?
When graphing data, this relationship creates a straight-line graph.
What is a direct proportion?
This happens to the arrangement of particles in a substance as they freeze.
What is they become more orderly or organized?
If an atom has 38 protons and 40 neutrons, then this is its mass number.
What is 78?
These are the elements in an electron dot diagram that are most likely to form a compound.
What are the atoms of elements that have unfilled outer energy levels?
This is the formula for the ammonium ion.
What is NH4 OR NH4+?