Sig figs/ Sci. Notation/ Other Calculations
What is the mean in following set of data:
3.5, 4, 7.3, 5.5, 3, 5, and 4.3
4.657
Which variable is the observable and measurable outcome?
Dependent variable
Which tool is used to measure mass and what is the base unit used?
A triple beam balance or digital scale and we use grams.
Name the abbreviations in order from greatest to smallest.
K, h, da, base, d,c, m
Which type of graph is used with data over time?
Line Graph
Write the following in scientific notation:
30500000
3.05 X 107
Why does an experiment needs constants?
Which type of tool would you use to measure the length of a car?
Meter Stick
Use the ladder method to convert 0.36 dm to km
0.000036 km
Describe quantitative and qualitative data.
Quantitative: Number data
Qualitative: Descriptive data identified by words
Write 6.34 X 10-6 in standard notation.
0.00000634
How many independent variables can be in an experiment?
One, but there can be multiple levels of the IV
What is the base unit for temperature? What other base unit for temperature is used in science?
Celsius- Kelvin
Convert 27 inches to cm
27in X 2.54cm/1in = 68.58 cm
What is the freezing point and boiling point of water in celsius?
0 and 100
Write the following in scientific notation:
0.0000000458
4.85 X 10-8
Why is a control used in an experiment?
A control is used as the comparison to make sure that the IV is what is changing the outcome.
What is the volume of a box that has the following measurements:
L= 15cm
W= 26cm
H= 60cm
L X W X H =23,400 cm3
Convert the following:
3.75 oz to liters
(1oz= 29.574 mL)
0.1109 L
What is the difference between weight and mass?
Mass is the amount of matter in an object, while weight is the amount or force of gravity pushing down on an object.
How many sig. figs. are in the following numbers:
1. 21,000
2. 0.00208
3. 450.0
1. 2
2. 3
3. 4
Why do we use the scientific method?
The scientific method is used because it is an organized process. Scientists across the world use this process so that everyone can follow along and understand how an experiment was done and how they got their results.
What is the method that we use to measure the volume of irregular solids and describe the process?
Water Displacement- Take a known amount of water in a graduated cylinder, add the object, measure the volume of the water after. Subtract the final from the initial and get the volume of the object.
Use conversion factors to convert
8.67 hL to cL
8.67hl X 100L/1hL X 100cL/1L =86,700 cL
What is the difference between precision and accuracy. Show a picture to describe this.
Precision is how close measurements are to one another, while accuracy is how close the measurements are to the true or accepted value.