½ Day Schedule 8:45-9:25 AM Block 1 9:25-10:05 AM Block 2 11:25-12:05  PM Block 5 12:05-12:35 PM LUNCH  All Students to the Cafeteria & Dismissal from the building beginning  @12:20 PM.

Biology Do Now 2-6-19 Directions: Take out a sheet of notebook (Do Now sheet) and, then answer the question. Explain how your digestive system can be called a “system” based on yesterday’s lesson.

Biology Do Now 2-6-19 KEY Explain how your digestive system can be called a “system” based on yesterday’s lesson. Our digestive system can be called a system because it is made of several organs (esophagus, stomach, sm/lg intestines, liver, gall bladder) that work together to help us break down foods so that we can absorb the nutrients and eliminate the solid waste.

Last night’s Homework – Turn in How do the cells in a multicellular organism help the organism act like a system? How do the two relate? How do they work together?

Homework - Copy 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.

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?”

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?

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 www.chem4kids.com

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

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

Metals Metals are shiny Metals are solid at room temperature Metals have high conductivity Metals can be flattened and not shatter (malleable)

Nonmetals Nonmetals are not shiny Nonmetals are mostly gaseous at room temperature Nonmetals are poor conductors Nonmetals are brittle and will shatter easily (not malleable or ductile)

Metalloids Metalloids have characteristics between metals and nonmetals Metalloids are solid at room temperature Metals are semi-conductors

Periods Each horizontal row of the table is called a period

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

Extend Students will complete the “systems investigation worksheet parts 1 & 2”

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