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Activity

Egg structure study

Summary: 
Crack an egg, then draw the parts. Learn what they are each for.
Science content (2016 curriculum): 
Biology: Features, Adaptations of Living Things (K, 1, 3, 7)
Biology: Life Cycles (2)
Science topic (2005 curriculum connection): 
Life Science: Characteristics of Living Things (grade K)
Life Science: Needs of Living Things (grade 1)
Life Science: Animal Growth and Changes (grade 2)
Materials: 
  • egg
  • dark coloured dish to view in (shows white better), ideally with hard sides to crack it on
  • worksheet for drawing egg
Procedure: 

Before cracking the egg, look at the shape of the egg, and show that as it rolls its shape makes it move in a circle. This means that eggs laid by birds do not roll off ledges.

Crack an egg at each table group.
Students draw the parts that they can see (maybe inside the outline of a shell, if the students are old enough to translate to the new shape).
Possibly use as an art project (see above water colour painting).

Students tell the class what they find, and together figure out/learn what the parts are for:
Yolk: Feeds the embryo. Protein, some fat, vitamins and minerals. (Iron, vit A, vit D, phosphorus, calcium, thiamine, and riboflavin.) Also lecithin, an effective emulsifier. Yellow like carrots.
Egg white: albumen, the Latin word for “white.” 40 different proteins. Holds yolk in place
Chalazae: ropes of egg white. Holds the yolk in the center of the egg and nutrition for the embryo.
Eggshell: calcium carbonate. Air and moisture can pass through its pores. The shell also has a thin outermost coating called the bloom or cuticle that helps keep out bacteria and dust.
Membranes: between the eggshell and egg white. Defence against bacteria. Strong: made partly of keratin, a protein that’s also in human hair.
Air pocket: forms when the contents of the egg cool and contract after the egg is laid.

Attached documents: 
Grades tested: 
Gr K
Gr 1
Gr 2
Gr 3
Gr 4
Gr 5
Teacher: 
Ingrid
Lesley Lopez
Nitsa Panago
Teaching site: 
ingridscience afterschool
JEMZ+ After school science
Oppenheimer Elementary
Activity originally developed and delivered: 

Oppenheimer Elementary School