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How do Scientists Investigate the Natural World? What are the Processes of Science? 2

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Inferring is not guessing it is based on what you know from observations. 5 Damselfish maintain and defend “algal lawns”!

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Making a statement of what will happen next based on past experience or evidence. 7

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10 Write a question for each image that could be answered by conducting a scientific investigation.

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Every homework will be patrolled if its not complete you will receive a citation! 1 citation = B 2 citations = C & CALL TO THE JUDGES! 3 citations = D & CALL TO THE JUDGES! 4 citations = F & CALL TO THE JUDGES! 13

Complete Lesson 1 Assess Your Understanding pg 11 Review & Assessment #1-3 Page 45 Lab Fee $10 Vocabulary Study Sheet 9/5 14

How do Scientists Investigate the Natural World? Why is a standard measurement system important? What are some SI units? 15

16 -19°C = -2.2° F 725 kg = 1598 lbs over 65 feet!

Growers compete every year for the heaviest pumpkin in the United States. The 2012 winner weighed more than a ton! Ron brought his 2009 pound pumpkin to the Topsfield Fair in Topsfield, MA on September 28, lbs. 17

The metric system is a system of measurement based on the number 10. Modern scientists use a version of the metric system called the International System of Units, or SI. Using SI allows scientists to repeat experiments, compare data and communicate with each other about their results. 18

19 Kilo (k) Hecto (h) millimeter

Metric rulers are fairly easy to read. They deal with centimeters and millimeters. A meter (m) is the basic SI unit used for measuring length. 20

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The larger lines with numbers are centimeters, and the smallest lines are millimeters 22

Let’s practice measuring in cm. 23

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In SI, the basic unit for measuring mass is the kilogram (kg). 25 Hey! Don’t make fun of my mass or my weight!

26 Make it balance & add the three!

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MASS: is constant An object has mass if... it takes up space. WEIGHT: is a force that depends on gravity Most of the devices we use to measure mass are actually measuring the force that gravity has on the mass. Without gravity these can’t work. 28

This table shows how to convert between the volume of solids and the volume of liquids. 29 Meniscus!

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You can determine the volume of the model by measuring how much water it displaces. Initial minus final = volume of object. (cm3) 32

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Neither! They are the same, you are measuring weight which depends on gravity. 34

Step 1: obtain the weight of object. Grams Step 2: obtain the volume of the object. Measure volume as milliliters. Step 3: Calculate density by dividing weight (mass) by the volume. 35

How cold can we go? Temperature is the average energy of the movement of atoms. The slower they move, the cooler the temperature. So if movement defines temperature, when movement stops, that’s the coldest temperature can get! That temperature is called absolute zero because that is absolutely as cold as you can go. 36

The Kelvin scale, named after Lord Kelvin who proposed it, sets zero at absolute zero, the temperature where all atoms stop moving. No negatives. (Important to note the electrons in the atoms never stop!) The Kelvin scale is the basis for the SI temperature units. 37 Stand at absolute zero men!

Temperature Scales Which thermometer is Kelvin? Which is Celsius? What is the freezing point of water on the Kelvin thermometer? What is the boiling point of water on the Kelvin thermometer? 38 Page 20 Temperature

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40 You’re fast partner! The second is the SI unit to measure time. 60 seconds in a minute. 60 minutes in an hour.

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44 Oooo measure the TOYS!! Oooo Treat the toys with RESPECT!!! Oooo Calculate the volume and density of the TOYS!!

Complete Lesson 2 Assess Your Understanding pg 13& 21 Review & Assessment #4-7 Page 45 Lab Fee $5 Vocabulary Study Sheet 9/6 Back to School Night 9/19 45