Name: ___________________________
Robert Townson High School_______________________________________
ASSESSMENT TASK
Subject: Atoms, Compounds and Materials
Task Number: 2
Year / Class: Year 9
Task Title: Atoms
Faculty: Science
Weighting: 10%
Class Teacher:
Due Date:
TASK INSTRUCTIONS & REQUIREMENTS:
Part 1
Atoms are too small to see and we often use models to give us a better idea of their
structure.
Make a 3 dimensional (3D) model of an atom, labeling all parts. Your model needs
to be mounted on a base. (Remember a diagram is NOT a model).
Supply a written report on how the model was made. Explain what your model can
and cannot show.
Part 2
The atom has an important role to play, and the characteristics of its components
determine the atoms own features.
Name the three main components of the atom, and describe their features in terms
of charge, size and position in the atom. Relate these features to the structure and
function of the atom itself.
Part 3
Our concept of the atom has changed over time as new evidence is discovered. It has
changed from a simple solid ball concept through to the complex ideas as represented in
your model.
Prepare a time line of events, indicating the important steps in the development of
the presently accepted structure of the atom. Draw a timeline marked with:
- Important dates in history,
-The names of scientists who made the discoveries,
- An explanation of the impact of the discovery on our view of the atom.
Bibliography
Prepare a bibliography of all books, web sites, journals etc. used in your
assignment.
OUTCOMES:
CW1 Scientific understanding changes and is refined over time through a process of review by the scientific community. Students:
a. identify that all matter is made of atoms which are composed of protons, neutrons and electrons (ACSSU177)
b. describe the structure of atoms in terms of the nucleus, protons, neutrons and electrons
c.
outline historical developments of the atomic theory to demonstrate how models and theories have been contested
and refined over time through a process of review by the scientific community
Marking Criteria
Part 1 – model
Criteria – The model shows:
Labelled nucleus
Protons labelled with positive charge
Neutrons labelled
Electrons labelled with a negative charge
Number of protons = number of electrons
Electron shells shown
Protons and neutrons similar size, electrons significantly smaller
Atoms is named
Correct number of protons
Neatness and appearance
Procedure written
States what model can show
States what model cannot show
TOTAL
Mark
1
1
1
1
1
1
1
1
1
2
1
1
1
/14
Part 2 – components
Criteria
Protons – correct charge, name, and position in the atom,
relative size
Neutrons – correct charge, name, and position in the atom,
relative size
Electrons – correct charge, name, and position in the atom,
relative size
Relates features to structure of atom
TOTAL
Mark
3
3
3
1
/10
Part 3 – History of the atom
Criteria
Accurate timeline drawn
Dalton (full name)– dates and information correct, describes
their model
JJ Thompson (full name) – dates and information correct,
describes their model
Rutherford (full name) – dates and information correct,
describes their model
Bohr (full name) – dates and information correct
TOTAL
Mark
2
3
3
3
3
/14
References
Criteria
Names, author and publisher of at least 2 secondary sources
including one book plus websites used in the research
The above but not correctly referenced
TOTAL
Mark
2
1
/2
Total
/40