Chlorophyll

Chlorophyll

Pencil and paperOnline interactive
Overview
Using this Resource
Connecting to the Curriculum
Marking Student Responses
Further Resources
This task is about reading science formulae.

Question 1Change answer

Two of the main types of chlorophyll found in plants are known as chlorophyll A and chlorophyll B.
Their chemical formula are:  
Chlorophyll A          C55H72N4O5Mg
 
Chlorophyll B          C55H70N4O6Mg
 
a)  Name all the elements found in chlorophyll A.

Question 1Change answer

Chlorophyll A          C55H72N4O5Mg
 
Chlorophyll B          C55H70N4O6Mg
 
b)  How many more atoms are there in chlorophyll A, than in chlorophyll B? 
     
Task administration: 
This task can be completed with pencil and paper or online.
Level:
5
Description of task: 
Students are given the formula of two different types of chlorophyll. Students name all the elements present, and how the number of atoms differs between the chlorophylls.
Curriculum Links: 
Science capabilities
The capabilities focus is brought about by the conversations you have and the questions you ask.
 
Capability: Interpret representations
This resource provides opportunities to discuss that scientists have an agreed code for names of chemical elements and ways of representing numbers of atoms that allows them to more easily show relationships and combinations.
Science capabilities: 
Answers/responses: 
   Y10 (05/1999)
a) Carbon, hydrogen, nitrogen, oxygen, magnesium 2 correct– moderate

1 correct– very easy

b) 1 easy