1. Biology Do Now
Directions: Take out a sheet of notebook (Do Now sheet) and, then answer the question based on last night’s homework.
What is the difference between polar and nonpolar molecules?

2. Biology Do Now
What is the difference between polar and nonpolar molecules?
Polar molecules have an uneven distribution of the electrons resulting a part of the molecule having a positive charge and another part having a negative charge.
Nonpolar molecules have an even distribution of the electrons resulting in no charges on the molecule.

3. Last night’s Homework – Turn in
Students will research to define and describe an example for each term: atom, molecule, covalent bond, ionic bond, polar molecule, nonpolar molecule, electronegativity, and hydrogen bond.

4. Engage – Answer on a sheet of notebook paper
Ask students,
“What are living things made of? And
“Why do you think we have to study chemistry in Biology?”

5. Explore - “Humans Really Are Made of Stardust…”
Students will read the article and answer the guide questions.
1) What fraction of the elements found in stars do humans share?
2) What elements are living things made of?
3) What does CHNOPS stand for?
4) What does APOGEE stand for?
5) Why do we have to study chemistry in biology?

6. Objective(s)
Students will know the connection between studying chemistry in a biology course by reading an article on “Humans are really made of stardust.” Mastery: 75% on TDQs
Students will know the chemical basis of life by learning how the periodic table of elements is organized and what information the periodic table can provide us. Mastery: 75% on the chemistry of life POGIL

7. Vocabulary Words Atom Molecule Compound Cell Tissue Organ Organ system
Organism
Population
Community
Ecosystem
Biosphere
Carbon
Hydrogen
Nitrogen
Oxygen
Phosphorus
Sulfur
Water
Polar
Nonpolar
Carbohydrates
Lipids
Proteins
Deoxyribonucleic acid
Ribonucleic acid

8. What is the Periodic Table?
It represents our understanding of the structure and usefulness of the atoms that have been identified in our environment
Elements are organized on the Periodic Table based on similar properties
Picture from

9. What do the numbers and Letters mean?
Element Name
Atomic Number:
The number of protons in its atom.
Atomic Number
Element’s Chemical Symbol
Atomic Mass
Atomic Mass:
The mass of one atom of the element

10. The Periodic Table can also be divided into three main types of Elements: Metals, Metalloids, and Nonmetals

11. Periods
Each horizontal row of the table is called a period

12. Groups (Families)
The Columns are called Groups
There are 18 groups

13. Extend
Students will complete the “Properties of Water” POGIL

14. Evaluate – Exit Ticket
How is the periodic table of elements organized and what information can it provide us?