Chem Quick Quiz 9-20-10

1. Chem Quick Quiz 9-20-10 Time Start Use Dimensional analysis to convert 60 miles to centimeters meters (Hint: 1 Inch = 2.54cm). Please be sure to show your work using correct sig figs and scientific notation. Notes Go over Exam Part 2

2. Use Dimensional analysis(what I have been showing you the last two days) to 22.5 meters to feet(Hint: 1 Inch = 2.54cm). Put into proper format. Known and Unknown Convert meters to cm 60 miles 5280 ft. 60 miles = ? cm x = 316,800 ft Find conversion Factors 1 1 mile Convert cm to inches 5280 feet = 1 mile 1 inch = 2.54 cm 12 inches = 1 foot 316,800 ft. 12 in. x = 3,801,600 in. 1 1 ft. Convert inches to feet 3,801,600 in. 2.54 cm. x = 9,656,064 cm. 1 1 in. 9.7 x 106 cm Go over Exam Part 2

3. Physics Quick Quiz 9-20-10 Time Start Use Dimensional analysis to convert 60 miles to centimeters meters (Hint: 1 Inch = 2.54cm). Please be sure to show your work using correct sig figs and scientific notation. Go over Exam Part 2

4. Use Dimensional analysis(what I have been showing you the last two days) to 22.5 meters to feet (Hint: 1 Inch = 2.54cm). Put into proper format . Known and Unknown Convert meters to cm 60 miles 5280 ft. 60 miles = ? cm x = 316,800 ft Find conversion Factors 1 1 mile Convert cm to inches 5280 feet = 1 mile 1 inch = 2.54 cm 12 inches = 1 foot 316,800 ft. 12 in. x = 3,801,600 in. 1 1 ft. Convert inches to feet 3,801,600 in. 2.54 cm. x = 9,656,064 cm. 1 1 in. 9.7 x 106 cm Go over Exam Part 2

5. Chem Quick Quiz 9-21-10 Time Start Neutrons— an elementary particle having no charge, mass slightly greater than that of a proton Protons— a positively charged elementary particle that is a fundamental constituent of all atomic nuclei Electrons— an elementary particle that is a fundamental constituent of matter, having a negative charge, and existing independently or as the component outside the nucleus of an atom. Nucleus— the dense central portion of an atom, composed of protons and neutrons. Dalton’s Atomic Theory— the first theory to relate chemical changes to events at the atomic level. Objective: Use your algebra knowledge to solve problems in scientific notation, significant figures and metric units. 

6. Physics Quick Quiz 9-21-10 Time Start distance - physical length; a scalar quantity which refers to how much ground an object has covered during its motion. acceleration - the rate of change of velocity over time. time -   the measured or measurable period during which an action, process, or condition exists or continues. displacement - a change in position; ∆d = d2 – d1 velocity - the rate of change of displacement over time; the ratio of motion in a particular direction;  the distance traveled divided by the time taken. free fall - the motion of a falling object that is influenced only by gravity. Objective: Learn that Scientific inquiry follows general and specific investigative procedures to produce valid data for drawing conclusions.

7. Chem Quick Quiz 9-22-10 Time Start Atom— the smallest particle of an element that retains the properties of that element Valence electrons— electrons on the outer most shell. Atomic number— the number of positive charges or protons in the nucleus of an atom of a given element. Mass number— the total number of protons and neutrons in the nucleus of an atom. Atomic mass— the number of positive charges or protons in the nucleus of an atom of a given element. Atomic mass unit (amu)— a unit of mass equal to one-twelfth the mass of a carbon-12 atom. Objective: Use your algebra knowledge to solve problems in scientific notation, significant figures and metric units. 

8. Physics Quick Quiz 9-22-10 Time Start speed - the rate at which an object covers distance; a scalar quantity which refers to how fast an object is moving. average speed – the total distance over a period of time. instantaneous speed – how fast an object is going at a certain time variable – a symbol that is used to represent a value that can change independent variable – the variable that can be manipulated by the experimenter dependent variable – the variable that is changed when the independent variable is changed. magnitude – scalar – a quantity that has just magnitude vector – a quantity with magnitude and direction Objective: Use your algebra knowledge to solve problems in scientific notation, significant figures and metric units. 

9. Chem Quick Quiz 9-23-10 Time Start Objective: Use your algebra knowledge to solve problems in scientific notation, significant figures and metric units. 

10. Physics Quick Quiz 9-23-10 Time Start Objective: Use your algebra knowledge to solve problems in scientific notation, significant figures and metric units. 

11. Chem Quick Quiz 9-21-10 Time Start neutrons - an elementary particle having no charge, mass slightly greater than that of a proton   protons - a positively charged elementary particle that is a fundamental constituent of all atomic nuclei. electrons - an elementary particle that is a fundamental constituent of matter, having a negative charge, and existing independently or as the component outside the nucleus of an atom. valence electrons  - electrons on the outer most shell electron configuration- the arrangement of electrons around the nucleus of an atom in its ground state molecular structure - is the three- dimensional arrangement of the atoms that constitute a compound. Objective: Use your algebra knowledge to solve problems in scientific notation, significant figures and metric units. 

12. Chem Quick Quiz 9-21-10 Time Start Linear molecules – atoms arranged in such a way that they are in or resemble being in a line Trigonal planar - is a molecular geometry model with one atom at the center and three atoms at the corners of a triangle Tetrahedral - molecule in which a central atom forms four bonds which are directed toward the corners of a regular tetrahedron Objective: Use your algebra knowledge to solve problems in scientific notation, significant figures and metric units.