GROWING SNAKE LABLAB 1

GROW AND GLOW SNAKE LABYOU WILL MEASURE THE LENGTH, WIDTH, CIRCUMFERENCE, AND WEIGHT OF THE SNAKE OVER A PERIOD OF 5 DAYS

OBJECTIVES• HONE MEASURING SKILLS• MASTER THE USE OF BALANCES, CALIPERS, AND RULERS• ACCURATELY MEASURE AND RECORD CHANGES IN WIDTH,

CIRCUMFERENCE, LENGTH , AND WEIGHT OF THE “SNAKE” OVER TIME

• COMPARE ACTUAL MEASUREMENTS TO CALCULATED MEASUREMENTS

• CALCULATE PERCENT CHANGES (DAILY AND TOTAL)• DETERMINE RATES OF CHANGE

??????MATERIALS????

• GROW AND GLOW SNAKE• SMALL STORAGE CONTAINER• WATER (ML)• METRIC RULER (MM)• CALIPER (MM)• MARKERS (WET ERASE AND/OR PERMANENT)• CLEAN NOTEBOOK PAPER FOR NOTES• ????????

LAB 1

• Growing creatures are made out of a superabsorbent polymer that soaks up water.

• The polymer is similar to the non-toxic chemical used in baby diapers.

• The Grow and Glow Snake Co. claims that the snakes will “Grow 600%”.

A little background:

PRE-LAB WORK: DAY 1WEIGHT:• REMOVE LID FROM THE STORAGE CONTAINER• PLACE LID ON BALANCE• RECORD THE WEIGHT (DOUBLE CHECK)• PLACE SNAKE ON LID, RECORD THE WEIGHT OF BOTH• DETERMINE THE WEIGHT OF THE SNAKE (- WEIGHT OF LID)

DAY 1LENGTH:THE LENGTH OF THE SNAKE IS THE DISTANCE FROM ITS HEAD TO ITS TAIL. HOW WILL YOU MEASURE PRECISELY?

CIRCUMFERENCE:THE CIRCUMFERENCE OF THE SNAKE IS THE THICKNESS OF THE SNAKE ALL THE WAY AROUND. (MM)

WIDTH:USE A CALIPER TO DETERMINE WIDTH. (MM)

CHOOSE YOUR LAB GROUP (X4)

• THIS IS PROBABLY THE ONLY TIME THIS YEAR…CHOOSE WISELY

CHOOSE A LAB STATION TO CALL HOME

• COME UP WITH A NAME FOR YOUR SNAKE!!!!• MAKE SURE ITS APPROPRIATE!!!!

• WRITE ALL LAB MEMBER’S NAMES IN WET ERASE MARKER + PERIOD NUMBER ON CONTAINER

• MAKE SURE YOUR SNAKE HAS A MARK IN THE MIDDLE (PERMANENT MARKER), SO THAT YOU MEASURE THE CIRCUMFERENCE IN THE SAME PLACE EACH DAY

DAY 1• USING A PERMANENT MARKER, MARK THE SPOT WHERE YOU WILL MEASURE THE

WIDTH/CIRCUMFERENCE OF YOUR SNAKE (JUST A THIN LINE) MIGHT ALREADY BE DONE FROM LAST YEAR

• TAKE MEASUREMENTS OF DRY SNAKE. DETERMINE THE LENGTH, WIDTH, WEIGHT AND CIRCUMFERENCE OF DRY SNAKE. RECORD.

• TRANSFER YOUR SNAKE INTO THE STORAGE CONTAINER. ADD WATER. HOW MUCH???? (ML)

• MAKE A HYPOTHESIS FOR PROJECTED GROWTH OF LENGTH/WIDTH/CIRCUMFERENCE AND WEIGHT. CLEARLY WRITE IT IN YOUR NOTEBOOK (IF…..THEN….). INCLUDE SPECIFICS!!!!!

• PURPOSE: RESEARCH QUESTION• BACKGROUND?• MATERIALS LIST• VARIABLES?• PROCEDURE (WRITE AS A LIST OF DIRECTIONS!!!!)

DAY 2-5C. TAKE MEASUREMENTS OF WET SNAKE

• TAKE SNAKE OUT OF WATER. DRY OFF. • DETERMINE THE LENGTH, WIDTH, AND CIRCUMFERENCE. RECORD.• DETERMINE WEIGHT (PUT SNAKE ON LID!). RECORD.

• DETERMINE % CHANGES FOR LENGTH/CIRCUMFERENCE/WEIGHT• TO CALCULATE THE PERCENTAGE INCREASE: FIRST: WORK OUT THE

DIFFERENCE (INCREASE) BETWEEN THE TWO NUMBERS YOU ARE COMPARING. THEN: DIVIDE THE INCREASE BY THE ORIGINAL NUMBER AND MULTIPLY THE ANSWER BY 100. IF YOUR ANSWER IS A NEGATIVE NUMBER THEN THIS IS A PERCENTAGE DECREASE

PRESENT YOUR DATA

•GRAPH YOUR DATA •MORE THAN ONE GRAPH? •DAILY/TOTAL % CHANGES?•L/C/W/W?

•CLEARLY LABEL YOUR AXES!!!!!!!!!!!!

CALCULATIONS/ANALYSIS

• A. PERCENT CHANGES (DAILY/TOTAL)

• B. RATES OF CHANGE • TO CALCULATE THE PERCENTAGE INCREASE: FIRST: WORK OUT THE

DIFFERENCE (INCREASE) BETWEEN THE TWO NUMBERS YOU ARE COMPARING (NEW #- ORIGINAL #= INCREASE). THEN: DIVIDE THE INCREASE BY THE ORIGINAL NUMBER AND MULTIPLY THE ANSWER BY 100. IF YOUR ANSWER IS A NEGATIVE NUMBER THEN THIS IS A PERCENTAGE DECREASE

FORMAL LAB REPORT

• FOLLOW LAB REPORT FORMAT• DUE FRIDAY, SEPT 4TH