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Chapter 1

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A system of ________________________________ ____________________________________________

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Technology is the __________________________ ____________________________________________ Are interdependent. How is life different now than it was in the late 1800s?

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Natural science ◦ Physical Science -_________________________________ ◦ ________________- application of physics and chemistry to the study of the Earth. ◦ Space Science - study of universe beyond _________ ◦ Life Science - ____________________________(Biology).

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Is the study of the muscle movements in the human body an example of biology or physics?

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Space and Time Matter and Change Forces and Motion Energy

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The Universe is ____________________________ meters in diameter. ◦ The same as: 700,000,000,000,000,000,000,000,000 beach balls. There are two characteristics of matter: ◦ ____________________ The basic building block of matter is the __________________

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_____________causes a change in motion. ◦ Something still-start to move ◦ Something moving-change direction Two types of energy: ◦ Kinetic-__________________________________________ ◦ Potential-________________________________________

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The scientific facts of today will not change in the future.

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An organized plan for ______________________ ____________________________________________ The goal is to solve a problem or to better understand an observed event. ◦ How can you test if running in the rain keeps you drier than walking in the rain over the same distance?

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A scientific investigation often begins with making observations. Observation – _________ _______________________ _______________________ ◦ How does your speed affect how wet you get when you are caught in the rain?

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____________________________________________ If…then…statement. If I run faster in the rain, then I won’t get as wet.

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Experiments – ______________________________ ____________________________________________ Manipulated variable – ______________________ ____________________________________________ ◦ The speed with which you walk or run. Responding variable –_______________________ ____________________________________________ ◦ The amount of water you accumulate. _______________________– only one variable, the manipulated, is deliberately changed at a time. All other variables kept constant.

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Does your data support the hypothesis? ◦ Walking Scientist – 217 grams of water. ◦ Running Scientist – 130 grams of water. Scientific evidence supports our earlier hypothesis. What happens if the hypothesis was not supported? ◦ __________________________________________________ ◦ New experiment must be performed.

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Can a theory be developed after one experiment? Scientific theory –___________________________ ____________________________________________ ____________________________________________ Theories are never ______________, they only become stronger with evidence. ◦ Earth is flat, Earth is round, Earth is spherical.

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A statement ___________ _______________________ _______________________ _______________________ Describes an observed pattern in nature without attempting to explain it. ◦ Ex: Law of Gravity

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Make it easier to understand things that might be too difficult to _______________________ Newer models continually replacing older models.

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Scientific Notation - ________________________ ________________________________________________ ________________________________________ 300,000,000 = 3.0 X 10 8 0.00086 = 8.6 X 10 -4 Multiplying? ◦ _________________the numbers that appear before the multiplication signs and ______________the exponents. Dividing? ◦ _________________the numbers that appear before the exponential terms and _________________the exponents.

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SI system

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_______________– straight-line distance between two points (meter). Mass – _____________________________________ ________________________________________(kg). Volume – __________________________________ ________________________________________(m 3 ). Density – ratio of an object’s mass to its volume (_______________) ◦ Kg/m 3

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How many grams in 160 mg? 0.160 grams

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Precision – _________________________________ ____________________________________________ ◦ The precision of an answer limited by the least precise measurement in the calculation. Accuracy – _________________________________ ____________________________________________ ____________________________________________

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Measured with a ___________________________.

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Scientists can organize their data by using data tables and graphs. Data tables – relates two variables – __________________________________________.

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Line Graphs - Showing changes ◦ Manipulated – ___________________ ◦ Responding – ___________________ Figure 21 Plotting the mass of water against the volume of water yields a straight line. Slope = Rise/Run Steepness of the line

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Bar Graphs – _______________________________ ____________________________________________ ____________________________________________ Circle Graphs – _____________________________ ____________________________________________ ____________________________________________

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