Bell Ringer Review from Friday What does –ology mean? What is the meaning of these prefixes: – Meteor- – Geo- – Hydro- – Eco- – Bio-

Earth’s System Group Assignment Each group will have one of the Earth’s four systems Describe each system, include drawings or illustrations

1.2 Notes Scientific Method

Series of problem-solving procedures that help scientists conduct experiments Scientific methods are used by scientists to help organize and plan their experiments and investigations.

Factors of the Scientific Method Hypothesis = testable explanation of a situation that can be supported or disproved Experiment = classified as an organized procedure that involves making observations and measurements to test a hypothesis.

Factors of the Scientific Method Variable = factor that can cause a change in the results of an experiment – Independent variable = the factor that is changed by the experimenter – Dependent variable = a factor that is affected by changes in the independent variable. Control = factor that does not change when other variable do – used in an experiment to show that the results of an experiment are a result of the condition being tested.

In-Class Assignment

Bell Ringer 8/19 What is a variable? What are the two types of variables?

Measurement Le Système International d’Unités (SI) is a modern version of the metric system based on a decimal system.

SI Unit

SI Units Kelvin = °C +273 –Example: 20 °C = 293 K 1000 mL = 1 L

Measurement  Density is the measure of the amount of matter that occupies a given space.  Density = mass/volume  The SI units for density are expressed in grams per cubic centimeter (g/cm 3 ), or grams per milliliter (g/mL)  1 cm 3 = 1 mL

Scientific Notation In scientific notation, a number is expressed as a value between 1 and 10 multiplied by a power of 10. – Example  The number of grains of sand on Earth is approximately 4,000,000,000,000,000,000,000 and would be written as 4  – Example  The mass of Earth at 5,974,200,000,000,000,000,000,000 kg would be written as  kg

Scientific Notation Practice Convert the following into scientific notation: = Convert the following into scientific notation: = Convert the following into a regular number: 3.65 = Convert the following into a regular number: 8.91 = Convert the following into scientific notation: =

In-Class Assignment Page 16 – Section Review Questions #1-8 Vocabulary Crossword