Download - Natural Sciences and Technology Grade 5
Natural Sciences and Technology Grade 5
Term 4:Planet Earth and Beyond Fossils (PPT 2) Topic 4 Fossils
Types of fossils
Gr 5 Natural Sciences and Technology Term 4, Topic 4 Types of
fossils There are two main types of fossils: Body fossils
Formed from the hard parts of plant and animals e.g. teeth, bones,
shells, stems, leaves and seeds. Trace fossils Fossils formed from
traces (or clues) left by animals e.g. footprints, nests, eggs and
droppings. Gr 5 Natural Sciences and Technology Term 4, Topic 4
Body fossils 1. Teeth and bones
A bit of broken tooth can be found within another animals bones.
Teeth help us to see whether the extinct animal was a carnivore or
a herbivore. Bones help us to determine the size and the shape of
the animal. Scientists use the bones to reconstruct (put back
together) extinct animals. Gr 5 Natural Sciences and Technology
Term 4, Topic 4 Body fossils Teeth and bones
Gr 5 Natural Sciences and Technology Term 4, Topic 4 Body fossils
2. Shells Most commonly found fossils.
Because they are naturally hard, they fossilise easily. Almost
always found in sedimentary rock. Gr 5 Natural Sciences and
Technology Term 4, Topic 4 Body fossils Shells Gr 5 Natural
Sciences and Technology Term 4, Topic 4 Body fossils 3. Stems,
leaves and seeds Most commonly found fossils.
Because they are naturally hard, they fossilise easily. Almost
always found in sedimentary rock. 3. Stems, leaves and seeds Gr 5
Natural Sciences and Technology Term 4, Topic 4 Body fossils 3.
Stems, leaves and seeds
The softer parts, like the leaves, are trapped between sedimentary
layers or in resin. Resin is a sticky substance that plants
produce. Resin becomes hard and forms amber. Gr 5 Natural Sciences
and Technology Term 4, Topic 4 Body fossils 3. Stems, leaves and
seeds
The same can happen to animals. Whole animals are captured for us
to study. Gr 5 Natural Sciences and Technology Term 4, Topic 4
Trace fossils Footprints
Fossil footprints are signs that organisms once lived on our
planet. Difficult to identify the type of animal. Gr 5 Natural
Sciences and Technology Term 4, Topic 4 Trace fossils Fossil
footprints give us information about:
the speed of the animal. length of stride. whether the animal
walked on two or four legs. the bone structure of the foot. Gr 5
Natural Sciences and Technology Term 4, Topic 4 Trace fossils 2.
Eggs Many fossilised eggs have been found.
They often contain parts of an embryo. An embryo is an organism in
its very early stages of development, before you can recognise it.
Gr 5 Natural Sciences and Technology Term 4, Topic 4 We can then
match an egg with an animal species.
Trace fossils We can then match an egg with an animal species. Gr 5
Natural Sciences and Technology Term 4, Topic 4 Trace fossils
3.Nests Nests can be made from clay, sticks, grass and leaves. The
nests and the eggs found can tell us a lot about animals like
dinosaurs. Gr 5 Natural Sciences and Technology Term 4, Topic 4
Trace fossils 4. Droppings Fossilised droppings can be
studied.
It can be taken apart to study the different parts that it is made
up of. It can tell us what type of food the animal ate. Gr 5
Natural Sciences and Technology Term 4, Topic 4