Vocabulary
Give 2 requirements for a good testable question
Measurable Variables and Empirical Answerability
What variable do you control and change BEFORE completing the lab?
independent variable
List the metric prefixes in order from largest to smallest:
kilo (k)--hecto (h)--deka (da)--ONE/BASE--deci (d)--centi (c)--milli (m)
Which graph type is best used when showing continuous change?
Line graph
Why is scientific notation used?
To remove zeros in very big and very small numbers
What is a dependent variable?
The variable that changes as a result of the changes YOU make to the independent variable
Where does the dependent variable go on a graph?
Y-axis
In class we discussed 3 advantages of the metric system. List 2
1) International Standard--almost all other countries use this system
2) Ease of conversions--based on powers of 10 so you can just move the decimal point
3) Simple--all measurements only change at the base unit--prefixes remain the same no matter what is being measured
List 4 of the 5 requirements on a line graph
How many numbers can be to the left of the decimal in proper scientific notation. What are the requirements of these numbers?
Exactly one non-zero digit must be to the left of the decimal point.
What is volume measured in?
mL or cm3
What question can you ask yourself when trying to determine the independent variable?
"What am I changing?"
Do you need MORE or LESS of a smaller prefix? Explain.
A smaller prefix will require MORE. Similar to describing your height in inches compared to feet. The object doesn't change its size, but depending on the unit of measurement, you will need a more specific or smaller unit.
When are bar graphs the best choice?
When COMPARING individual events--one response is not based on another response. Think of the results of survey questions.
Write the number 0.000045 in proper scientific notation
4.5 x 10-5
What word could replace density when describing matter: How ____________ the matter is
What would 2 constant variables in the following scenario:
A student is trying to determine if crushing a pill helps it dissolve faster in water.
Volume of water and Temperature of water
52 dg_____________mg
5200 mg
If 30 freshman students are surveyed and 22 play a fall sport, what is the percent of students that play a fall sport?
73.3%
What is one way you can determine the volume of an object with an irregular shape?
The most effective method is to use the water displacement method.
Describe the format for a properly worded hypothesis
A properly worded hypothesis is a testable statement that predicts the relationship between two or more variables. It typically includes an independent variable
What is the independent variable in the following testable question:
Does the color of a surface affect it's temperature?
Surface color
0.36 m _______________hm
0.0036 hg
What do line graphs allow for that no other graphs do?
Because line graphs show continuous change, they allow for estimation of values not listed.
Calculate the mass of an object with a density of 1.5 g/cm3 and a volume of 8 cm3
12 grams