Mary Anning was the first woman fossil hunter. She found some spectacular fossils in the cliffs of southern England in the early 19th century. She is known as the "Mother of Palaeontology" for her fossil discoveries. 
 But... WHAT IS A FOSSIL? 
A fossil is any preserved record of life in the past that is more than 10,000 years old. 
A corporeal fossil is the remains of an animal or plant body, its imprint or cast. 
A trace fossil: indicates that a plant or animal existed, but is not a fossil body. It includes footprints, punctures, root marks, bite marks, etc. 
 
A.- Which of the following are fossils?  
 
1.- Human footprints from 4,000 years ago, 
2.- A squirrel crushed on the road. 
3.- Cellular filaments from 3.5 billion years ago. 
4.- A petrified tree trunk 
5.- The trace of a trilobite from 530 million years ago. 
6.- Dendriform mineral growths 
7.- A rock from the seabed with holes caused by boring organisms. 
A human form preserved in the volcanic ash of Pompeii. 
9.- A piece of dinosaur skin. 
 
B.- Look at the illustrations. Indicate if they are fossils:

Source: https://www.earthlearningidea.com/PDF/Spanish_What_is_a_fossil.pdf