PART1: CANDLE SUCKING AIR ?
PROCEDURE
MAterials: a shallow dish, matches, cylinder or flask, candle, hard-boiled egg, paper , Erlenmeyer flask
Do this set up and describe what happens.
Light a candle and stand it upright in the middle of a pan and secure it with meted drippings. FIll the pan half full with water. While the candle is still burning , place a narrow glass or graduated cylinder over the candle. Observe the base of the container, the water level in the container, and the flame.. Record your observations.
OBSERVATIONS :
ANALYSIS
1) When does the water level in the jar rise ? Why does it rise ?
Explain in details. It has to do with air pressure and differential of air pressure
PART 2: THE MAGIC EGG
watch video first
Cool Experiments: How To Suck An Egg Into A Bottle
PROCEDURE: Find a flask or jar that has a month slightly smaller than the diameter of an egg. Peel the shell from a hard-boiled egg. Crumple a piece of notebook paper and after lighting it on fire, quickly stuff it in the flask. Immediately place the egg over the mouth of the flask and observe, paying particular attention to the egg when it is first on the flask.
observations:
When does the egg enter the flask ? Why does it enter. ?
To remove the egg from the flask , invert the flask to the egg settles in the neck. GEntly heat the flask with a candle until the egg is forced out by expanding air.
Light a second piece of paper and place it inside the flask. While holding the flask with hot mitt, quickly place the egg in the neck and invert the bottle while holding the egg in place. Does the egg in the egg rise into the flask again gravity ? explain?
GOING FURTHER - QUESTIONS
1)Are fluid pused (by pressure differentials ) or pulled (by suctions?) (like drinking with a straw)
2) How does a vacuum cleaner work draw a diagram and indicate regions of higher and lower pressure
© haplosciences 2000-2009-
vente par correspondence jeux éducatifs, jeux scientifiques clement o ni , jeux educatifs
Amina, Wanikou, mael r oi du mail , laboratoire chimie, fiches e xperiences, thomas au temps des chevaliers, Pilou la classe,
fichiers animation les francas, jeux engrenages singes, engre nages juniors, engr e nages train safari, prismes
microscopes, p rismes, jeux gyzmo sous la mer, jeux engrenages, c o loriage, travaux manuels, animaux, sciences, vente prismes
tub es a essai, apprendre l a nglais , coloriae , anglais maternelle, jeux clémentoni, cahiers maternelle, anglais enfants, anglais petits
vente par correspondence jeux éducatifs, jeux scientifiques clement o ni , jeux educatifs
Amina, Wanikou, mael r oi du mail , laboratoire chimie, fiches e xperiences, thomas au temps des chevaliers, Pilou la classe,
fichiers animation les francas, jeux engrenages singes, engre nages juniors, engr e nages train safari, prismes
microscopes, p rismes, jeux gyzmo sous la mer, jeux engrenages, c o loriage, travaux manuels, animaux, sciences, vente prismes
tub es a essai, apprendre l a nglais , coloriae , anglais maternelle, jeux clémentoni, cahiers maternelle, anglais enfants, anglais petits