Chapter 1 The World of

When taking notes: Your notes should include everything written in YELLOW text on this Power Point.

That’s Science Section 1 Science-a process of gathering information about the natural world around us.   To be science, it must be able to be measured and observed.

Is it Science? Don’t Have To Put This In Your Notes But Ask Yourself The Questions. A student wants to know how fast something will fall if it is dropped off the top of a tall tower. Can you measure this? Can you observe it? Is it Science?

What is Physical Science? the study of matter and energy. Physical science is made up of two categories: chemistry and physics.

Scientific Models Sometimes it is not possible to study the actual object of a scientific question. Models are a good way to represent the object that you cannot access.

A model is a representation of a real world object or system. It uses a familiar object to explain an unfamiliar object

Types of Scientific Models There are three types of Scientific Models: Physical Mathematical Conceptual Models are limited that they are next EXACTLY like the real thing. Physical Mathematical Conceptual

Models represent scientific ideas and objects. They are tools that can be used to generate new information, such as theory or law.

Tools In Science

Tools, Measurement, and Safety A tool is anything that helps you accomplish a task. In science, many tools are used to generate data. In science the metric system is used for all measurements.

Tools in Science One of most widely used ways to collect data is through measurement. Accurate measurements can only be obtained with proper tools. Tools such as meter sticks, balances, and thermometers can generate data, which is then analyzed using tools such as a calculator and/or computer.

Making Measurements Density Perimeter The amount of mass in a particular volume. It is calculated using the formula: D=m/V The distance around a closed plane. The formula to find perimeter: p= l + w + l + w or p= 2 (l +w)

Basic Metric Measurements Making Measurements The metric system, or International System of Units (SI), expresses units in multiples of 10. Basic Metric Measurements Volume A meter is the basic SI unit of length, 1m=39.4 inches Mass is the amount of matter in an object. A gram is the basic SI unit of mass. 1kg=2.2lbs A liter is the basic SI unit of liquid volume. Volume is the amount of space that an object occupies. Formulas to find solid volume. For a square/rectangular object: (V=l x w x h) For a cylinder: (V=πr2h) All solid units are cubed.

Making Measurements **This Slide for AC Only** Temperature Temperature Formulas The basic SI unit of temperature is kelvin (K). The other temperature scales you should be familiar with are Fahrenheit and Celsius. Boiling Point of Water 212°F 100°C Freezing Point of Water 0°C 32°F There is a mathematical relationship between all 3 scales. °F= (°C x 9/5) + 32 °C=(°F-32) 5/9 K=°C + 273.16 Absolute Zero: the point at which all molecular motion stops no life exists at the this point. It is zero on the kelvin scale.