Scientific Processes Flashcards
Estimating
Is to make a sensible or an educated guess of a quantity using the correct unit
Measuring
Is to choose a correct instrument in order to find the actual measurements of an object as specified units
Time
Seconds hours minutes
Watch stopwatch clock
Length
Cm mm m km
Ruler measuring tape
Temperature
Kelvin degree Celsius
Thermometer
Volume cm³ mm³ ml³
Measuring cylinder
Force
Newton
Force meter spring balance newton meter
Current
Amperes
Ammeter
Voltage
Volts
Voltmeter
Resistance
Ohms
Ohmmeter
Mass
Tonnes kg g
Triple beam balance
Top pan balance
What are the six steps to make accurate measurements
- Use the correct instrument
- Use the correct unit
- Understand the scale on the instrument
- Make sure that your eyes on the level with the object to avoid error of parallax
- If you are taking readings from measuring cylinder make sure that your eyes is on the line of the meniscus
6 adjust the instrument to zero - Repeat the experiment more than two times defined the average
Practical investigation
Is a way to find out new information to explore the world around us and develop new ideas in order to explain the world around us and to check that results of other scientists
Procedures on how to contact practical investigations
- Identify the question or state the aim of the investigation
- Hypothesis to fortell guess or predict the outcome
- Design the experiment plan how to conduct the experiment less the materials needed
- Carry out the experiment in order to make observations and to record your findings and results
- Make appropriate conclusions it should be related to the aim of the investigation or to the hypothesis
To make a fair test
It means to control the variable so that we can make sure that it is only the variable under the investigation that will cause the difference
Independent variable
Reverse to the things that you change in investigation your in control of independent variable
Dependent variable
Refers to the things you observe in an investigation a dependent variable will change depending on the independent variable
Control variable
The first to a quantity a scientist wants to remain the same or unchanged throughout the experiment
Importance of crow reading and the use of control
To get accurate measurements
Direct proportional
Is when one amount of a quantity increases and the other amount increases as well at the same rate
Indirect proportional
Is when one value of a quantity increases and the other value decreases at the same rate
Importance of units
*can help to show another person the exact amount
*To assist in solving a mathematical problem
*To show which measurement system the person is using
Importance of recording results of experimental investigations
To verify your results
To analyze the data you have collected
So that you don’t forget your results
Observing
Is the use of five sensors in order to get information of what is happening so you are able to make descriptions and make conclusions
Classifying
Is the Group things according to the similar characteristics
Recording
Is to note down your findings from practical investigations or experiments
Handling tata and presenting results
Handling information means to locate organize and present results in a way that is understandable to sciencitist and non sciencitist
Ways to present results
Graphs
.line graphs
Bar graphs
.histograph
Pictograph
Pie chart
2. Posters
Pictures
Charts
Drawings
Experimental control
Is another experiment that is set to make sure that it is only the factors that is being tested which will affect the outcome of the experiment
Absolute error
It tells the range of possible values that can be taken using particular unit of measurement
Relative error
It gives an indication of how good a measurement is relative to the size of the thing being measured
Determinate errors
Is when you are using an incorrect standardized instrument which is not your road or when you’re using a wrongly and analytical method
In determinant errors
Is to take readings incorrectly their car randomly and may not be easily detected