(no subject)
1.Quantitave information is numerical information, while qualitative information is descriptive information.
2. A hypothesis is a testable statement, as well as an educated guess.
3.A) A model in the scientific sense is more than a physical object; it is often an explanation of how phenomena occur and how data or events are related.
B) a theory is a broad generalization that explains a body of facts or phenomena, while a model is an individual phenomena within a theory.
4. It is important for a measurement system to have an international standard so experiments and data can be used or tested around the world by all different types of people while being on the “same page“.
5. A quantity is something that has magnitude, size, or amount. Ex 1: A teaspoon is a unit of measurement and volume is a quantity. Ex 2: A meter is a unit of measurement, the distance to in which you’ll have to travel is quantity.
6. Base Unit Quantity
Meter length
Kilogram Mass
Second Time
Kelvin Temperature
Mole Amount of substance
Ampere Electric Current
Candela Luminous Intensity
7.
A)kilo-1000
B)centi-1/100
C)mega-1,000,000
D)micro-1/1,000,000
E)mili-1/1000
8.
A)width of a gymnasium-meters
B) length of a finger-centimeter
C) distance between your town and the closest border of the next state-kilometer
D) length of a bacterial cell- attometer
9.
A)table-hectogram
B) coin-kilogram
C)A 250mL beaker-kilogram
10.The second is not defined by the length of the day because the length of the day may change due to the rotation of the earth, while a second is a controlled unit of time.
11.
A)A derived unit is formed by combinations of Si base units
B)the square meter is the Si derived unit ton area?
12.
A)two Si derived units for volume are cubic meters and cubic centimeters
B)two non-Si units for volumes are liter and milliliters, a milliliter is equal to one cubic centimeter and a liter is equal to cm3
13.
A)the units used to express density of gases are different from those used to express the densities of solids or liquids because the units kg/m3 is often too large for many experiments in the laboratory.
B)two units of density are kg/m3 and g/mL.
C) the temperature at which a density is measured is usually specified because density varies with temperature.
14.
A)cork, butter, and ice will float in water.
B) sucrose, bone, diamond, copper, and lead will sink in milk
15.
A) conversion factor- a ratio derived from the equality between two different units that can be used to convert from one unit to the other.
B) to find how much of something is in something else the relationship between the two must be found which is the conversion factor.
16. Accuracy refers to the closeness of measurements to the correct or accepted volume of the quantity measured. Where as precision refers to the closeness of a set of measurements of the same quantity made in the same way.
17.
A percent error = value accepted-value experimental x100
Value accepted
B) it has a negative value if the accepted value is less than the experimental value
18. The average for the set of values calculated by adding them all together and then dividing the sum by the number of values
19.The equation 4.6g + 0.2g means 4.6 plus or minus 0.2g
20. This would throw off the measurements dramatically, it would also throw off the calculation. You'd probably get an answer that is untrue.
21.
A)67.0g
B)2L
C)52.800mg
D)3.17mol
22.
A) When adding or subtracting decimals, the answer must have the same number of digits to the right of the decimal point as there are in the measurement having the fewest digits to the right of the decimal point.
B) For multiplication or division, the answer can have no more significant figures than are in the measurement with the fewest number of significant figures
23. Mx10 , where the factor M is a number greater than or equal to 1 but less than 10 and n is a whole number
24.
A) y/x=k
B) when one value increases, the other variable will increase at the same rate, if they are directly proportional
25.
A) xy=k
B) when one variable increases, the other would decrease at the same rate, if they were inversely proportional.
26.Volume = 0.250 x 6.1m x 4.9m = 7.47 cubic meter
27. Density = 5.03g / 3.24mL = 1.55g/mL
28. Mass = 55.1 g/cm3 x 6.72g = 370.272g
29. Volume = 0.451g / 0.824g/mL = 0.55mL
30.882 000 000 g
31.0.603L / 1000=0.000603mL
32.
A)0.09225km
B)9225cm
33. 1.53%
34.18.83%
35. -1.78%
36.
A) Four significant digitis
B) One significant digit
C)Six significant digits
D)Three significant digits
37.6.411g
38. 1.1cm
39. 2.79m
40. 29.74g
41.
A) 6.73 x 10^-4
B) 5.0 x 10^4
C)3.01 x 10^-6
42.
A)0.007050g
B) 400 005 00. mg
C) 23500.mL
43.
A)0.596 x 10^4mg rounded to 6.0 x 10^3mg
B)25.776 x 10^-3kg rounded to 2.6 x 10^-2m^3
C)68028 x 10^-3m^3 rounded to 6.8 x 10^-2m^3
D)0.865 x 10^9m^3 rounded to 8.6 x 10^8m^3
44.Mass and Length
45. Analyze: given-mass=2.03 x 10^-3g, density = 9.133 x 10^-1g/cm^3 unknown- the volume of the model
Plan: Volume = 9.133 x 10^-1/2.03 x 10^-3 = 449.9 x 10^-3
Compute: 4.5 x 10^-1
Evaluate 4.5 x 10^-1cm^3
2. A hypothesis is a testable statement, as well as an educated guess.
3.A) A model in the scientific sense is more than a physical object; it is often an explanation of how phenomena occur and how data or events are related.
B) a theory is a broad generalization that explains a body of facts or phenomena, while a model is an individual phenomena within a theory.
4. It is important for a measurement system to have an international standard so experiments and data can be used or tested around the world by all different types of people while being on the “same page“.
5. A quantity is something that has magnitude, size, or amount. Ex 1: A teaspoon is a unit of measurement and volume is a quantity. Ex 2: A meter is a unit of measurement, the distance to in which you’ll have to travel is quantity.
6. Base Unit Quantity
Meter length
Kilogram Mass
Second Time
Kelvin Temperature
Mole Amount of substance
Ampere Electric Current
Candela Luminous Intensity
7.
A)kilo-1000
B)centi-1/100
C)mega-1,000,000
D)micro-1/1,000,000
E)mili-1/1000
8.
A)width of a gymnasium-meters
B) length of a finger-centimeter
C) distance between your town and the closest border of the next state-kilometer
D) length of a bacterial cell- attometer
9.
A)table-hectogram
B) coin-kilogram
C)A 250mL beaker-kilogram
10.The second is not defined by the length of the day because the length of the day may change due to the rotation of the earth, while a second is a controlled unit of time.
11.
A)A derived unit is formed by combinations of Si base units
B)the square meter is the Si derived unit ton area?
12.
A)two Si derived units for volume are cubic meters and cubic centimeters
B)two non-Si units for volumes are liter and milliliters, a milliliter is equal to one cubic centimeter and a liter is equal to cm3
13.
A)the units used to express density of gases are different from those used to express the densities of solids or liquids because the units kg/m3 is often too large for many experiments in the laboratory.
B)two units of density are kg/m3 and g/mL.
C) the temperature at which a density is measured is usually specified because density varies with temperature.
14.
A)cork, butter, and ice will float in water.
B) sucrose, bone, diamond, copper, and lead will sink in milk
15.
A) conversion factor- a ratio derived from the equality between two different units that can be used to convert from one unit to the other.
B) to find how much of something is in something else the relationship between the two must be found which is the conversion factor.
16. Accuracy refers to the closeness of measurements to the correct or accepted volume of the quantity measured. Where as precision refers to the closeness of a set of measurements of the same quantity made in the same way.
17.
A percent error = value accepted-value experimental x100
Value accepted
B) it has a negative value if the accepted value is less than the experimental value
18. The average for the set of values calculated by adding them all together and then dividing the sum by the number of values
19.The equation 4.6g + 0.2g means 4.6 plus or minus 0.2g
20. This would throw off the measurements dramatically, it would also throw off the calculation. You'd probably get an answer that is untrue.
21.
A)67.0g
B)2L
C)52.800mg
D)3.17mol
22.
A) When adding or subtracting decimals, the answer must have the same number of digits to the right of the decimal point as there are in the measurement having the fewest digits to the right of the decimal point.
B) For multiplication or division, the answer can have no more significant figures than are in the measurement with the fewest number of significant figures
23. Mx10 , where the factor M is a number greater than or equal to 1 but less than 10 and n is a whole number
24.
A) y/x=k
B) when one value increases, the other variable will increase at the same rate, if they are directly proportional
25.
A) xy=k
B) when one variable increases, the other would decrease at the same rate, if they were inversely proportional.
26.Volume = 0.250 x 6.1m x 4.9m = 7.47 cubic meter
27. Density = 5.03g / 3.24mL = 1.55g/mL
28. Mass = 55.1 g/cm3 x 6.72g = 370.272g
29. Volume = 0.451g / 0.824g/mL = 0.55mL
30.882 000 000 g
31.0.603L / 1000=0.000603mL
32.
A)0.09225km
B)9225cm
33. 1.53%
34.18.83%
35. -1.78%
36.
A) Four significant digitis
B) One significant digit
C)Six significant digits
D)Three significant digits
37.6.411g
38. 1.1cm
39. 2.79m
40. 29.74g
41.
A) 6.73 x 10^-4
B) 5.0 x 10^4
C)3.01 x 10^-6
42.
A)0.007050g
B) 400 005 00. mg
C) 23500.mL
43.
A)0.596 x 10^4mg rounded to 6.0 x 10^3mg
B)25.776 x 10^-3kg rounded to 2.6 x 10^-2m^3
C)68028 x 10^-3m^3 rounded to 6.8 x 10^-2m^3
D)0.865 x 10^9m^3 rounded to 8.6 x 10^8m^3
44.Mass and Length
45. Analyze: given-mass=2.03 x 10^-3g, density = 9.133 x 10^-1g/cm^3 unknown- the volume of the model
Plan: Volume = 9.133 x 10^-1/2.03 x 10^-3 = 449.9 x 10^-3
Compute: 4.5 x 10^-1
Evaluate 4.5 x 10^-1cm^3