Chemistry Honors- Chapter 2 Test Preparation

To assist the chemistry folk in acing this exam.

What is the scientific method?

An approach to the solution of scientific problems OR a series of steps used to discover new facts about nature

What are the steps of the scientific method?

Observe natural phenomena, propose a hypothesis, experiment to test hypothesis, form a conclusion, theorize, and publish

What happens if a hypothesis stands the test of time?

It becomes a part of a theory or law

What is a qualitative observation?

An observation based on data from the five senses

What is a quantitative observation?

An observation based on numbers and statistics

What is the SI unit for straight line distances between two points (distance)?

Meters (m)

What is the SI unit for the amount of matter in a substance (mass)?

Grams (g)

What is the SI unit for the interval between two events (t

What is the SI unit for the relative hotness/coldness of an object OR the relative heat content (temperature)?

Kelvins (K)

What is the SI unit for the amount of substance?

Moles (mol)

What is the SI unit for luminous intensity (light)?

Candelas (cd)

What is the SI unit for the rate of electron flow (current) through an electrical conductor?

Ampere (A)

What is the difference between mass and weight?

Mass stays constant, no matter where you are, while weight changes due to the pull of gravity.

What is the formula for density?

Mass/volume

How can you find the mass of an object when given the density and volume?

Density x volume

How can you find the volume of an object when given the mass and density?

Density/mass

How many milliliters (mL) are in a liter (L)?

1,000 mL

How many centimeters CUBED (cm.³) are in 1 decimeter CUBED (dm.³)?

1,000 cm.³

What is the difference between accuracy and precision?

Accuracy is how close your measurements are to the accepted measurements, while precision is how close your measurements are to one another.

How do you calculate percent error?

(Accepted value-value calculated)/accepted value

What is the purpose of significant figures?

To make measurements more precise or take up less space

How many significant digits does a counting number have?

Infinite/unlimited

What is a unit for volume?

Liters (L)

What are some examples of units for density?

g/L, g/mL, g/cm³

What is a unit for energy?

Joules (J)

What is a unit for pressure?

Pascal (Pa)