Structure Of Eggs Flashcards
How many parts are there to an egg?
Three
Name the three parts of the egg.
Shell
White
Yolk
What percentage of the egg is made up of the shell?
10%
What percentage of the egg is made up of the white?
60%
What percentage of the egg is made up of the yolk?
30%
Write a note on the shell.
5
It is a hard, protective layer composed of mainly calcium carbonate
They are inedible and porous
They vary in colour, depending on the breed of bird that laid the egg
The colour does not affect the egg’s nutritional value or quality
On the inside of the shell is a thin membrane that encloses the white and yolk and leaves an air space at the wider end of the egg
Describe the structure of the shell.
4
It is a hard
Composed of mainly calcium carbonate
They are inedible
They are porous
What is the shell composed of?
It is mainly composed of calcium carbonate
Comment on the colour of the shell.
They vary in colour, depending on the breed of bird that laid the egg
The colour does not affect the egg’s nutritional value or quality
What is inside the shell?
A thin membrane
Where is the membrane of an egg located?
3
It is inside the shell
It encloses the white and yolk
It leaves an air space at the wider end of the egg
At what end of the egg is the air space located?
The wider end of the egg
Write a note on the white of the egg.
2
It is a viscous, colourless liquid that surrounds the yolk
It is composed of the proteins ovalbumin and globulin; minerals, vitamins and water
Where is the white located?
It surrounds the yolk
What is the white composed of?
5
Ovalbumin
Globulin
Minerals
Vitamins
Water
