Welcome to Physical Science You will succeed in this course If YOU apply yoursel
Finz, Stacy, Food Reporter has reference to this Academic Journal, PHwiki organized this Journal Welcome to Physical Science You will succeed in this course If YOU apply yourself & Take Good Notes ! Chapter 1: The Nature of Science Unit 1: Energy in addition to Motion Table of Contents 1 1.3: Communicating with Graphs 1.1: The Methods of Science 1.2: St in addition to ards of Measurement Science is a method as long as studying the natural world. It is a process that uses observation in addition to investigation to gain knowledge about events in nature. What is Science 1.1 The Methods of Science
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What is Science 1.1 Scientists ask questions to learn about the natural world. The Methods of Science Copy: It is a system of knowledge in addition to the methods used to find that knowledge! Science can be classified according to three main categories. Major Categories of Science 1.1 Life science deals with living things. Earth science investigates Earth in addition to space. Physical science deals with matter in addition to energy. The Methods of Science Matter in addition to Change: a. A very small amt. of the universe is matter. b. Matter has Volume in addition to Mass ! c. All Matter is made of Atoms! Big Ideas of Physical Science 1.1 Forces in addition to Motion: a. If you push on something still it will move. b. If you push on something moving you will change its motion. c. Forces cause change in motion. The laws of physics allows us to measure these changes in motion. Copy as long as Test
Energy: a. Energy exists in many as long as ms. b. Kinetic Energy vs. Potential Energy What is the Difference Science Explains Nature 1.1 c. When matter changes Forms Energy is released or gained. The Methods of Science Energy is Transferred but NEVER DESTROYED ! Major Topics – Chemistry Scientific Inquiry Matter Atoms Atomic Theory Periodic Table Writing in addition to Balancing Equations Acids in addition to Bases Motion Newtons Laws Force Work in addition to Power Electricity Magnetism Waves Light Major Topics – Physics
Investigations 1.1 The Methods of Science Scientists learn new in as long as mation about the natural world by per as long as ming investigations, which can be done in many different ways. Some investigations involve simply observing something that occurs in addition to recording the observations. Investigations 1.1 The Methods of Science Other investigations involve setting up experiments that test the effect of one thing on another. Some investigations involve building a model that resembles something in the natural world in addition to then testing the model to see how it acts. Scientific Methods 1.1 The Methods of Science An organized set of investigation procedures is called a scientific method. Six common steps found in scientific methods are shown.
Stating a Problem 1.1 The Methods of Science Many scientific investigations begin when someone observes an event in nature in addition to wonders why or how it occurs. Then the question of why or how is the problem. Sometimes a statement of a problem arises from an activity that is not working. Researching in addition to Gathering In as long as mation 1.1 The Methods of Science Be as long as e testing a hypothesis, it is useful to learn as much as possible about the background of the problem. Have others found in as long as mation that will help determine what tests to do in addition to what tests will not be helpful Forming a Hypothesis 1.1 The Methods of Science A hypothesis is a possible explanation as long as a problem using what you know in addition to what you observe. For example, NASA scientists hypothesized that a ceramic material might withst in addition to the heat in addition to as long as ces of reentry in addition to could work on the space shuttle.
Testing a Hypothesis 1.1 The Methods of Science Some hypotheses can be tested by making observations. Others can be tested by building a model in addition to relating it to real-life situations. Testing a Hypothesis 1.1 The Methods of Science One common way to test a hypothesis is to per as long as m an experiment. An experiment tests the effect of one thing on another using controlled conditions. Variables 1.1 The Methods of Science A variable is a quantity that can have more than a single value. You might set up an experiment to determine which of three fertilizers helps plants to grow the biggest. Possible factors include plant type, amount of sunlight, amount of water, room temperature, type of soil, in addition to type of fertilizer.
Variables 1.1 The Methods of Science In this experiment, the amount of growth is the dependent variable because its value changes according to the changes in the other variables. Variables 1.1 The Methods of Science The variable you change to see how it will affect the dependent variable is called the independent variable. Constants in addition to Controls 1.1 The Methods of Science A factor that does not change when other variables change is called a constant. You might set up four trials, using the same soil in addition to type of plant. Each plant is given the same amount of sunlight in addition to water in addition to is kept at the same temperature. These are constants.
Constants in addition to Controls 1.1 The Methods of Science The fourth plant is not fertilized. This plant is a control. A control is the st in addition to ard by which the test results can be compared. Constants in addition to Controls 1.1 The Methods of Science Suppose that after several days, the three fertilized plants grow between 2 in addition to 3 cm. Constants in addition to Controls 1.1 The Methods of Science If the unfertilized plant grows 1.5 cm, you might infer that the growth of the fertilized plants was due to the fertilizers.
Analyzing the Data 1.1 The Methods of Science Interpreting the data in addition to analyzing the observations is an important step. If the data are not organized in a logical manner, wrong conclusions can be drawn. An important part of every experiment includes recording observations in addition to organizing the test data into easy-to-read tables in addition to graphs. Drawing Conclusions 1.1 The Methods of Science Based on the analysis of your data, you decide whether or not your hypothesis is supported. For the hypothesis to be considered valid in addition to widely accepted, the experiment must result in the exact same data every time it is repeated. Being Objective or FAIR 1.1 The Methods of Science A bias occurs when you only test the experiment on yourself or a very small population.
Being Objective 1.1 The Methods of Science Scientists can lessen bias by running as many trials as possible in addition to by keeping accurate notes of each observation made. Valid experiments also must have data that are measurable. Being Objective 1.1 The Methods of Science The experiment must be repeatable. Findings are supportable when other scientists, or Mr. Litaker, per as long as ms the same experiment in addition to gets the same results. Visualizing with Models 1.1 The Methods of Science Sometimes, scientists cannot see everything that they are testing. They might be observing something that is too large, too small, or takes too much time to see completely.
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