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What is Science? Fritz Zwicky
According to the dictionary- science is the knowledge gained through the use of our senses and instrumentation while studying the physical world around us through observation and experimentation Fritz Zwicky
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Fritz Zwicky 1898-1974 Interesting character in science
Ideas were “outlandish” but just ahead of his time (peers) Some theories were unable to be validated b/c lack of technolgy Peers poked fun & ostracized him Today he is known as a genius and a pioneer in theoretical physics & astronomy
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What is Earth Science? Earth Science is the study of Earth and it’s position in the Universe. The study of the physical world around you and the forces that shape this dynamic planet Scientific discovery is made through using the scientific method
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What are the braches of Earth Science?
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What are the Branches Earth Science?
Astronomy
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Astronomy The study of the Universe, includes: All matter Time Energy
And Space Sub groups: cosmology, astrobiology, planetary sciences
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What are the Branches Earth Science?
Meteorology
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Meteorology & Climate Study of the Earth’s atmosphere
Including weather and climate Sub groups-climatologist,
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What are the Branches Earth Science?
Geology
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Geology The study of: History Structure Composition of the Earth
And the processes that affect Earth Petrology, seismology,
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What are the Branches Earth Science?
Oceanography
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Oceanography and Hydrology
Study of Earth’s oceans Components of the water cycle Effects of Water on the Planet: erosional and depositional consequences Sub groups- hydrologist
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To Learn about Earth Science…
Scientists use their senses to make observation and inferences Hypothesize Design experiments Hence follow the scientific method
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Scientific Method Definition:
Principles and procedures for the systematic pursuit of knowledge Involves the recognition and formulation of a problem The collection of data through observation and experiment Analyzing results
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Scientific Method
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PERCENT ERROR or DEVIATION
-how wrong you are
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PERCENT ERROR or DEVIATION
Definition how right or wrong you are when conducting an experiment The approximation error in some data which is the difference between an exact value and your measured value Many times error can occur because the measurement of the data is not precise due to the instruments or other factors
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? Accepted value = correct answer Measured value = your guess
Accepted value - measured value PCT ERROR = x 100% accepted value ? Temperature?
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? Accepted value - measured value
PCT ERROR = x 100% accepted value ? Temperature?
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There are actually 495 jellybeans (ACCEPTED VALUE)
Guess how many jellybeans are in this draw. Record your answer (MEASURED VALUE) There are actually 495 jellybeans (ACCEPTED VALUE) How wrong use the equation below to find out Accepted value - measured value PCT ERROR = x 100% accepted value
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Practice: A student measures a table to be 1.9m long. In reality it is 2.0m long. What is the percent error of the student? 2.0 – 1.9 X 100 = 5% 2.0
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A student measures a room to be 6. 9m. If the actual length is 7
A student measures a room to be 6.9m. If the actual length is 7.5m, the student’s percent error is? 7.5 – 6.9 X 100 = 8% 7.5
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A student determines the volume of a cube to be 8. 6cm3
A student determines the volume of a cube to be 8.6cm3. The correct volume is really 8.0cm3. What is the student’s percent deviation? 8.6 – X = 7.5% 8.0
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Observations, Inferences, Classification
An observation is an interaction of our senses with the environment What is used to make an observation? Page 7 the five senses
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Senses Can your senses be fooled? Lets see
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Directions: Aloud, say the color not the word
Are you ready??????
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YELLOW
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BLUE
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ORANGE
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BLACK
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RED
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GREEN
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PURPLE
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YELLOW
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RED
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ORANGE
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GREEN
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BLACK
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BLUE
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RED
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PURPLE
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GREEN
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BLUE
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ORANGE Brain Games- Apollo Pay Attention
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What can you use to extend your powers of observation?
Page 8 What can you use to extend your powers of observation? D. Instruments Identify instruments 1-10 **Add pictures & names of instruments**
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What can you use to extend your powers of observation?
Page 7 D. Instruments Graduated cylinder Microscope Spring Scale Weather Vane Barometer T.B.B.
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What can you use to extend your powers of observation?
Page 7 D. Instruments Telescope Thermometer Magnifying Glass Ruler
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Inference Page 7 An educated guess or interpretation based upon your observations and your life experiences
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Observation VS. Inference
Page 8 Answers to puppy page part B Observations 4 dogs 1 large & 3 small Spotted Black & white
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Observation VS. Inference
Page 8 Answers to puppy page part B Inferences Large dog is the mother & 3 small are the puppies Puppies are hungry They are Dalmatians
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Observation VS. Inference
Page 8 Answers to puppy page part C a. O b. I c. O a. I b. O
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Observation VS. Inference
Page 8 Answers to puppy page part C a. I b. O a. O b. I
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Classification A..…based on properties or characteristics of an object
Page 8 A..…based on properties or characteristics of an object B. Classification systems enable the investigator to organize data in a meaningful way Can you name a classification system??
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Answers to Questions on page 9
4 2 1 3 4 2 Page 9
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Measurement All measurements consist of: Numerical values
Labeled units Linear Measurement- is the distance between 2 points 1. Ruler Page 5
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Metric System Basics
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Metric System The metric system is based on a base unit that corresponds to a certain kind of measurement Length = meter Volume = liter Weight (Mass) = gram Prefixes plus base units make up the metric system Example: Centi + meter = Centimeter Kilo + liter = Kiloliter
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Metric System The three prefixes that we will use the most are: kilo
centi milli kilo hecto deca Base Units meter gram liter deci centi milli
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Metric System So if you needed to measure length you would choose meter as your base unit Length of a tree branch 1.5 meters Length of a room 5 meters Length of a ball of twine stretched out 25 meters
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Metric System But what if you need to measure a longer distance, like from your house to school? Let’s say you live approximately 10 miles from school 10 miles = meters 16093 is a big number, but what if you could add a prefix onto the base unit to make it easier to manage: 16093 meters = kilometers (or 16.1 if rounded to 1 decimal place)
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Metric System These prefixes are based on powers of 10. What does this mean? From each prefix every “step” is either: 10 times larger or 10 times smaller For example Centimeters are 10 times larger than millimeters 1 centimeter = 10 millimeters kilo hecto deca Base Units meter gram liter deci centi milli
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Metric System Centimeters are 10 times larger than millimeters so it takes more millimeters for the same length 1 centimeter = 10 millimeters Example not to scale 40 41 1 mm 40 41 1 cm
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Metric System For each “step” to right, you are multiplying by 10
For example, let’s go from a base unit to centi 1 liter = 10 deciliters = 100 centiliters 2 grams = 20 decigrams = 200 centigrams ( 1 x 10 = 10) = (10 x 10 = 100) (2 x 10 = 20) = (20 x 10 = 200) kilo hecto deca meter liter gram deci centi milli
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Metric System An easy way to move within the metric system is by moving the decimal point one place for each “step” desired Example: change meters to centimeters 1 meter = 10 decimeters = 100 centimeters or 1.00 meter = 10.0 decimeters = 100. centimeters kilo hecto deca meter liter gram deci centi milli
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Metric System Now let’s try our previous example from meters to kilometers: 16093 meters = decameters = hectometers = kilometers So for every “step” from the base unit to kilo, we moved the decimal 1 place to the left (the same direction as in the diagram below) kilo hecto deca meter liter gram deci centi milli
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Metric System If you move to the left in the diagram, move the decimal to the left If you move to the right in the diagram, move the decimal to the right kilo hecto deca meter liter gram deci centi milli
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Metric System Now let’s start from centimeters and convert to kilometers centimeters = 4 kilometers centimeters = kilometers kilo hecto deca meter liter gram deci centi milli
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Metric System Now let’s start from meters and convert to kilometers
4000 meters = 4 kilometers kilo hecto deca meter liter gram deci centi milli Now let’s start from centimeters and convert to meters 4000 centimeters = 40 meters kilo hecto deca meter liter gram deci centi milli
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Metric System Now let’s start from meters and convert to centimeters
5 meters = 500 centimeters kilo hecto deca meter liter gram deci centi milli Now let’s start from kilometers and convert to meters .3 kilometers = 300 meters kilo hecto deca meter liter gram deci centi milli
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Metric System Now let’s start from kilometers and convert to millimeters 4 kilometers = millimeters or 4 kilometers = 40 hectometers = 400 decameters = 4000 meters = decimeters = centimeters = millimeters kilo hecto deca meter liter gram deci centi milli
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Metric System Summary Base units in the metric system are meter, liter, gram Metric system is based on powers of 10 For conversions within the metric system, each “step” is 1 decimal place to the right or left Using the diagram below, converting to the right, moves the decimal to the right and vice versa kilo hecto deca meter liter gram deci centi milli
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Volume Is the amount of space an object occupies Page 6
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VOLUME of an irregularly shaped object:
What instrument would be used to measure the volume of an object such as a rock?
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Describe the process you would use.
VOLUME of an irregularly shaped object: Describe the process you would use. Put water into cylinder measure volume of water place object in cylinder re-measure volume of water subtract volumes Page 7
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What instrument would be used to measure this object’s volume?
Volume of a regular rectangular object: What instrument would be used to measure this object’s volume? ruler Page 7
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What is the formula for finding the volume of this object?
V = L x W x H H W L Page 7
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Calculate the volume of this object to the nearest tenth of a cubic centimeter. Show all formulas.
V = L x W x H = 4.0 x 3.2 x 12.3 = cm³ Page 7
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scale NOTHING! THE NUMBER OF ATOMS REMAINS THE SAME
Name the common scientific instrument used to measure mass: Mass is the amount of matter in an object scale If an object is heated, what happens to its mass? Why? NOTHING! THE NUMBER OF ATOMS REMAINS THE SAME Page 9
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HOW TIGHTLY PACKED THE ATOMS ARE Density Page 10 DENSITY:
Let’s give it a try!
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Sample Problems density = mass / volume = 240g / 12cm³ = 20.0 g/cm³
A rock has a mass of 240g and a volume of 12cm³. Showing all formulas and calculations, determine the density of the rock. Sample Problems density = mass / volume = 240g / 12cm³ = 20.0 g/cm³ Page 10
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Sample Problems If the empty container has a mass of 100g and
the filled container has a mass of 250g. What is the density of the liquid inside? Show all work below. Sample Problems mass of liquid 250g – 100g = 150g density of liquid density = mass/volume Page 11 = 150g /100mL = 1.5 g/mL
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What happens to the density of an object when it is split into smaller
parts? why? Density nothing! the atoms are still packed the same Page 13
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Topic 1 ESRT Work Packet Page d 3 4
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Density expands less page 7 less DENSITY: HOW TIGHTLY PACKED
THE ATOMS ARE Density When an object is heated, it and the atoms become packed. Therefore the object becomes dense. expands less page 7 less Page 14
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Density expands less page 7 less DENSITY: HOW TIGHTLY PACKED
THE ATOMS ARE Density When an object is heated, it and the atoms become packed. Therefore the object becomes dense. expands less page 7 less Page 14
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Density contracts more page 7 more DENSITY: HOW TIGHTLY PACKED
THE ATOMS ARE Density When an object is cooled, it and the atoms become packed. Therefore the object becomes dense. contracts more page 7 more
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Density density page 7 temperature Page 14
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Density density Pressure Page 14
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The density of water when it is most dense is: Density of water:
1.00 g/mL
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Any material with a density less than water will
Density of water: Float or Sink Any material with a density less than water will Any material with a density greater than water will FLOAT SINK
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D = m ÷ v = 25g ÷ 50mL = 0.5 g/mL Density of water example:
If an object has a mass of 25g and a volume of 50mL, will it sink or float in liquid water? D = m ÷ v = 25g ÷ 50mL = 0.5 g/mL it will FLOAT
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Phases of Matter & Density
During which phase of matter (solid, liquid, or gas) are most materials: most dense? least dense? solid gas
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Why Graph?? Look at this sunspot data table
Can you make any sense of it??
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Why Graph?? Now can you see the relationship??
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How to Construct a Graph
Why Graph? Graphs - It’s a visual way to present data This allows you to easily identify relationships between the variables And recognize rates of change by looking at the slope of the line Types of graphs: -line graphs, bar graphs, pie charts
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Graphical Relationships
Direct Relationship: increases As one variable increases, the other __________________. Page 19
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Graphical Relationships
Examples Pressure & Density
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Graphical Relationships
Indirect Relationship: decreases As one variable increases, the other __________________
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Graphical Relationships
Examples
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Graphical Relationships
Cyclic Relationship: As one variable increases, the other changes in a predictable pattern Events that are cyclic are also ___________________ predictable
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yearly temperatures (seasons)
Cyclic events Give three real-life, earth science, examples of cyclic events phases of moon yearly temperatures (seasons) sunspots tides sunrise & sunset
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Graphical Relationships
Examples
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Graphical Relationships
No Relationship: stays the same As one variable increases, the other __________________
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rate of change- -How fast something changes over a unit of time i.e. feet per second (ft./sec), or miles per hour (m/ h) Equation located on page 1 of ESRT
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example: From 3:00 pm to 6:00 pm the air temperature falls from 85oF to 79oF. What is the rate of change for temperature during this time? Rate of change =
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Do now: In 60 years, the shoreline at Rye Beach has shrunk by 30 inches. What is the rate of change for the shoreline?
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Dynamic Equilibrium Give a real life, earth science example of a
system that is in dynamic equilibrium.
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Dynamic Equilibrium Give a real life, earth science example of a
system that is in dynamic equilibrium.
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Interfaces fronts Give a real-life, earth science example
of an interface. fronts
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Types of graphs: -line graphs Uses coordinates (x and y axis)
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Types of graphs: -line graphs direct indirect or inverse cyclic
relationship relationship relationship
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Rules for making graphs:
1) The graph should be as simple and easy to read as possible.
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Rules for making graphs:
On each axis, equal intervals must represent equal changes
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Rules for making graphs:
3) Time is always plotted on the “x” (horizontal) axis
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Rules for making graphs:
4) When possible, make best fit line(s)
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Rules for making graphs:
5) Fit the graph to the paper. Make it large enough to fit most of the paper.
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Rules for making graphs:
6) Label each axis with quantity and units
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Rules for making graphs:
7) The graph should make sense.
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Can you find the error in this graph?
Should be a line graph
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Line should not start at zero
Neither axis is labeled with units
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Labels on axis switched
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Graph does not fit line Vertical axis does not increase evenly
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earth science, examples
Cyclic events Give three real-life, earth science, examples of cyclic events phases of moon yearly temperatures sunspots tides sunrise & sunset
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Topic 1 ESRT Work Packet Page 3 3 1 a. 2, b. 4, c. 3 decrease Page 2 3 1 2
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Page 5 2 3 650 km/ day Topic 1 ESRT Work Packet Page 5, #4
R.O.C= Δ Value time Measure distance, use map scale 2600km 4 days answer = 650 km/ day
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Topic 1 ESRT Work Packet Page 6 1 2 20 km/ hr Page 5 2 3 650 km/ day
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Scientific Method
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Lab: How many Candies? Your procedure is a series of steps to solve the problem It’s a set of directions to guide the scientist through the experiment Like directions to your house Don’t assume anything
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Lab: How many Candies? Procedure:
Mass the full cup of M&Ms with the balance Mass the empty cup with the balance Determine the mass of the M&Ms by finding the difference of the full cup and empty cup Find the mass of a single M&M Calculate the number of M&Ms in the cup by dividing the total mass of the M&Ms/ by the mass of a single M&M Record your results
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Percent Deviation or Error
the amount of error in a measurement or experiment Formula found on page 1 of ESRT
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Formulas density: percent error (deviation): rate of change:
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