<< Chapter < Page | Chapter >> Page > |
Assignment 8:
Identification of fossils
1. Coral
2. Found in rock layers near Ceres in the Western Cape. These corals were formed in the sea approximately 400 million years ago.
3. Cycad family
4. Grows well in any moist, sheltered area.
5. Very high temperatures
Evaporation
Earth movement that caused water to drain away
Over-utilisation of nature, etc.
6. In the deeper rocks
RECONSTRUCTION OF THE FOSSIL OF A DINOSAUR
IDENTIFICATION OF FOSSILS
ASSIGNMENT 8
1. What is this fossil called nowadays?
_____________________________________________________________________
2. Where do we normally find this fossil in colonies?
_____________________________________________________________________
Williamsonia
3. Which tree family above shows a resemblance with this fossilised leaf?
_____________________________________________________________________
4. Centuries ago, this was only found in tropical forests. Where can it be found today?
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
5. The above picture represents a fossilised Gosiutichthys (a fish). The fish died when the lake in which it lived dried up. Supply three possible reasons for the drying up of a lake.
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
6. It is important to be able to determine the age of fossils. This can be done by different means. Sometimes scientists compare the amount of gas in a rock sample with the amount of lime in the original rock to determine the age of the fossil.
The age of fossils can also be determined by means of radioactivity.
Where would we find the oldest fossils - in shallower or in deeper layers of rock?
_____________________________________________________________________
CONSERVATION OF FOSSILS
GROUP WORK
Making a casting mould of your hand.
REQUIREMENTS:
a tray of wet sand;
a strip of cardboard (5 cm x 38 cm);
Plaster of Paris;
water;
paperclips.
METHOD:
Assessment Criteria | 1. | 2. | 3. | 4. |
1. Knowledge and understanding of fossils (LO 2.3) | ||||
2. Experiment (LO 1.2): Instructions followed. | ||||
3. Finish: precise | ||||
4. Cooperation within group |
Learning Outcome 1: The learner will be able to act confidently on curiosity about natural phenomena, and to investigate relationships and solve problems in scientific, technological and environmental contexts.
Assessment Standard 1.2: We know this when the learner conducts investigations and collects data.
Learning Outcome 2: The learner will know and be able to interpret and apply scientific, technological and environmental knowledge.
Assessment Standard 2.3: We know this when the learner categorises information.
Notification Switch
Would you like to follow the 'Natural sciences grade 6' conversation and receive update notifications?