Presentation on theme: "Warm-up List 10 lab safety rules. Do you have the proper heading on your paper? REMEMBER: You will keep this paper ALL week. Put it somewhere you won’t."— Presentation transcript:
*Observation A fact learned directly from the senses. Sight Smell Touch Hearing Taste
When observing, always: Write the time and date of the observation Record observations at the time they were made; Make both quantitative and qualitative observations.
Quantitative and Qualitative observations. Quantitative— observations involving measurements Qualitative— observations of properties such as texture (comparing to known).
*Measuring using metric units to describe objects or observations
*Inferring Using past experience to make a reasonable guess to explain observed events
*Predicting— Using prior knowledge to make a forecast about a future event.
*Classifying GGroup objects or events based on similarities or differences
*Defining Operationally State information about an object or event based on experience with it. What it ISWhat it ISN’T observableDictionary definition synonym
*Communicating Use words, pictures, and diagrams to share information
*Making Models Construct real or mental representations to explain ideas, objects, or events
*Investigating Performing a set of steps to answer a specific question or problem.
Scientific Process A series of steps that is used to find answers to questions about the world around us.
Problem The problem must be written as one QUESTION The problem must identify the variables. The question must be testable and measurable.
Variables Things that can be changed are called variables. Every investigation should have 2 variables. Manipulated (Independent) variable – the thing the researcher is changing Responding (Dependent) variable – the thing the researcher is measuring.
Research Gather more information You can look for prior research in the library You can ask people who know about the topic (teacher) Use the information to form a hypothesis – you don’t always write down your research.
Hypothesis Should be written as an if/then statement Example: If food coloring is added to the water, then the flowers petals will change colors. This is a prediction of what will happen in an experiment and should be based on your research and observations
Experiment capitalize name brands only) List materials needed in a column (no numbers, capitalize name brands only) Develop a numbered procedure. Use complete sentences.
Experiment Follow the steps in your procedure Record data and observations using the Metric System
Analyze Data Is the data reliable? Does it support your hypothesis? Record your data on graphs and charts.
Claim ~ A statement that answers the problem. Your hypothesis is a prediction of what the answer to the problem is. The claim is the answer to the problem.
Evidence ~ scientific data that supports the claim ~data can be numbers (quantitative data) or observations using the five senses (qualitative data)
Reasoning ~ the explanation that shows why the data counts as evidence to support the claim ~ the explanation often includes scientific principles or background knowledge of the topic
Practice On your paper, write a statement explaining whether or not any of the liquids are the same substance. DensityColorMassMelting Point Liquid 1 0.93 g/mLno color38g-98°C Liquid 2 0.79 g/mLno color38g26°C Liquid 3 13.6 g/mLsilver21g-39°C Liquid 4 0.93 g/mLno color38g-98°C
0 points1 point2 points Claim No claimClaim is incorrect States that liquid 1 & 4 are the same. Evidence No evidence Missing numbers or units for 1 or more substances Gives the density with units of all substances Reasoning No reasoning or repeats claim / evidence Incomplete – missing explanation of using properties for identification. Explains properties can be used to identify a substance and substances 1 & 4 have the same properties which means they are the same thing. How did you do?