Chapter 3 Flashcards
What is a measurement?
An act of comparing an unknown quantity to a standard unit ?
What are dimensions?
Measurable properties of matter and energy ?
What are the two parts of measured data?
A number and a unit 1⃣2⃣3⃣4⃣5⃣6⃣7⃣8⃣9⃣?
Who established a decimal metric system of measures consisting of the meter and kilogram?
France ??
What system is known as the SI system?
French system ??
What is the SI’s base unit for measurement?
The meter ?
What is precision?
An assessment of the exactness of a measurement ?
What does the percent error compare?
The magnitude of the measurement error with the size of the measurement ??
What is an essential tool of science?
Math, because creating scientific models often involves mathematical formulas. 1⃣➕1⃣
What are significant digits?
They apply to measurements and are used to show what is known about a measurement
Do measurements have unlimited precision?
No ✖️
Are scientists encouraged to add precision to a measurement?
NO
When adding and subtracting data, what must be the same?
The units
When multiplying or dividing, how many SD’s can the answer have?
The same amount of SD’s as the measurement with the least
Precision can not change (the decimal points) when multiplying and dividing data.
Yeah I got this wrong sooooo. That’s the true statement. ☺️?
