Ch 3 & 4 Review

Crazy Conversions

100

A measurement contains these two things in order to be complete.

What are numbers & units.

200

John is trying to convert 1.32 meters into centimeters. What is the conversion factor he needs to use?

1 m/100 cm  or  100 cm/1 m

300

What is the SI unit for measuring temperature?

Kelvin (K) or Celsius (*C)

400

A piece of string measures 1.2 meters in length. Convert this length to millimeters.

1200 mm

500

The length of the classroom is 12.5 meters, and the width is 850.5 centimeters.
What is the area of the classroom in meters²?

Use the proper number of sig figs.

106 m²    (3 sig figs)

Let's Get Subatomic

100

This subatomic particle has a negative charge and can be found in a cloud shape outside the nucleus.

What is an electron?

200

This term refers to the combined number of protons and neutrons in an atom's nucleus.

What is the atomic mass?

300

This subatomic particle determines the atomic number of an atom, as well as what element it is.

What is a proton?

400

This subatomic particle has no charge, but contributes to an atom's mass.

What is a neutron?

500

If an atom completely fills up two electron energy levels, how many electrons does it have?

10 electrons

Sig Figs & Sci Notes

100

Calculate the correct answer, to the correct number of sig figs:
7.4320 cm + 2.0 cm = ?

9.4 cm

200

The number of sig figs in this number:

0.003060

4

300

What is the correct way to round this number to 4 sig figs?

0.0002013547684

0.0002014

400

What is the correct way to write the following number in scientific notation?

0.00020135 g

2.0135 x 10^-4 g

500

Significant Figures indicate these two things about a measurement or a calculation.

What are Precision & Accuracy?

Woops!

100

The act of resetting a measuring instrument in order to bring it back to the standard measure, to correct its accuracy.

What is "calibration" or "tare"?

200

This type of error occurs when you view the measuring instrument from different angles, resulting in an inaccurate reading.

What is Parallax error?

300

This category of errors affects the precision of the measurement.

What are Random Errors?

400

This type of error is caused by carelessness or human clumsiness, typically an accident.

What is a Blunder?

500

This type of error results from when the experimental procedure itself is flawed, resulting in inaccuracies in the experiment.

What is Theoretical Error?

Atomic Theorists

100

In Neils Bohr's atomic theory, electrons absorb energy and become excited. They release that energy as this, in order to go back to the ground state.

What is light?

200

This scientist accidentally discovered the nucleus in 1911, using a beam of positively charged particles aimed at a piece of gold foil.

Who is Rutherford?

300

This British Quaker developed the theory that all things are made up of indivisible, spherical atoms based on his research on elemental ratios in compounds.

Who is John Dalton?

400

This atomic model showed electrons orbiting around the nucleus in clear, defined circles, like the Earth does around the Sun.

What is the Planetary Model?

500

Schrödinger & Heisenberg developed this atomic model, which depicts the probability where an electron can be found.

What is the electron cloud model?