A cast fossil happens when the structure of the dead organism is filled with mineral-water. All sorts of organisms have been fossilised….

www.friendsofwhitcliffecommon.org.uk www.paleo.cc/fossils/coprolites.htm

How to make a cast fossil

…including dinosaur poo!

This is how to make your own cast fossil dinosaur poo:

1. You will need newspaper, sticky tape, modrocand warm water.

2. Scrunch the newspaper up and wrap sticky tapeall around to create the right shape.

3. Cut the modroc into sheets, dip in a bowl of warm water and wrap overthe newspaper.

UKS2 Topic: Dinosaurs and Fossils Block A: Fossils and Rocks Session 3

© Original resource copyright Hamilton Trust, who give permission for it to be adapted as wished by individual users. We refer you to our warning, at the foot of the block overview, about links to other websites.

A mould fossil is formed by the impression left in rock by the remains of an organism.

How to make a mould fossil

www.eps.utk.edu/eps102.php

This is how to make your own mould fossil:

1. You will need air drying clay andplastic dinosaurs, plastic bones, shells and leaves.

2. Press the clay down flat with thepalm of your hand

UKS2 Topic: Dinosaurs and Fossils Block A: Fossils and Rocks Session 3

© Original resource copyright Hamilton Trust, who give permission for it to be adapted as wished by individual users. We refer you to our warning, at the foot of the block overview, about links to other websites.

3. Press an object into the clay.

4. Carefully take it out to revealthe mould of the shape. You have made a mould fossil!

What else could you press into the clay?

UKS2 Topic: Dinosaurs and Fossils Block A: Fossils and Rocks Session 3

© Original resource copyright Hamilton Trust, who give permission for it to be adapted as wished by individual users. We refer you to our warning, at the foot of the block overview, about links to other websites.

How to make an amber fossil

www.gemrockauctions.com/auctions/nr-gemstones/item-293732

Amber is fossilized tree resin. Because it was originally a soft, sticky tree resin, amber sometimes contains animal and plant material. These are preserved exactly how they would have been when they fell into the resin.

To make an amber fossil, you will need: Cheap epoxy resin (one per fossil) A small heat-proof mould, Yellow food colouring Something to trap inside the fossil, Something to protect the table Warm, soapy water to hand.

1. Get everything ready because you will needto work quick. Snap the lid off the resin.

Before you start, remember, BE CAREFUL near epoxy resin. The chemical reaction that occurs produces quite a bit of heat, so do not touch the resin canisters or the mould. If you get it on your skin, wash it off immediately with warm, soapy water.

UKS2 Topic: Dinosaurs and Fossils Block A: Fossils and Rocks Session 3

© Original resource copyright Hamilton Trust, who give permission for it to be adapted as wished by individual users. We refer you to our warning, at the foot of the block overview, about links to other websites.

1. Mix the resin together in the little trayprovided with the stick provided in the pack.

2. Add a tiny drop of yellow food colouring

3. Mix well until the mixture thickens and pourinto the mould.

4. ‘Trap’ something into the resin. Repeat step 1-3until the mould is filled with resin.

5. Wait for at least the amount of time the resin instructions suggest, before takingthe mould off the fossil. You may need a pair of scissors to help cut away the mould.

© Original resource copyright Hamilton Trust, who give permission for it to be adapted as wished by individual users. We refer you to our warning, at the foot of the block overview, about links to other websites.

UKS2 Topic: Dinosaurs and Fossils Block A: Fossils and Rocks Session 3