Explain to someone who knows nothing about fossils the study of invertebrate paleontology and how it helps scientists understand the history of the earth. Be sure your explanation contains a minimum of two complete sentences.

Paleontology is the study of the history of life on Earth as based on fossils. Fossils are the remains of plants, animals, fungi, bacteria, and single-celled living things that have passed away and replaced by some rock material. They're impressions of organisms preserved in rock. Paleontologists use fossil remains to understand different aspects of extinct and living organisms.

Vertebrate paleontology and invertebrate are subfields of paleontology. It is the scientific study of ancient invertebrates. They do this by analyzing invertebrate fossils.

All of this, all this studying helps to know our past. Perhaps our descendants. It helps to know how the animals at whatever period were capable of, how they lived, if they were living good or struggling, perhaps possible death situations that may happen to us and prevention, etc...

Explanation:

assuming that your periodic table has eighteen columns, you should highlight   the four elements in the third column from the left of the table.

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the have energy higher than those in the orbital while lower than those of the orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the orbital is therefore filled right after orbitals and before orbitals.  

potassium has electron configuration and calcium . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the and should be highlighted as well.