Ask your partner, “What color are you wearing for the pep assembly?” Please Grab: -HW Sheet -Rubric (on back table) -Formation of Elements W.S (last night’s homework)

Warm up Write the reaction for the following processes: The Alpha Decay of Uranium-235 92 235 𝑈 → 2 4 𝐻𝑒 + 90 231 𝑇ℎ The Beta Decay of Carbon-14 6 14 𝐶 → −1 0 𝑒 − + 7 14 𝑁 The Fusion of Oxygen-16 6 12 𝐶 + 2 4 𝐻𝑒 → 8 16 𝑂 Multiple correct answers, as long as masses add up to 16, and atomic numbers equal 8

HW review- With your lab group! Team Captain is the person with the longest pinky finger! 1. Within your group determine who is your “team captain” 2. Team captain, lead the group through the answer key. 3. Determine any questions that you have after reviewing the key 4. Ms. Jarvis will come back together and answer questions as a whole class 5. Log on your HW sheet and make a plan if not feeling 

Wow…that just happed this week Wow…that just happed this week! Two neutrons stars collided and let off gravitational waves and gamma rays! https://www.youtube.com/watch?v=AMwIdCyujyY http://www.cnn.com/videos/us/2017/10/16/two-neutron-stars-collided-orig-lc.cnn

Star Project: Create a 3-D Model that describes low mass, high mass and super high mass star Due: Blue 10/24 Gold 10/25 Make sure to review the grading rubric! This will count as a test grade.

Why should we care about this?

Recipe For a Star

Recipe for a Star Activity Step1: How does a proton + electron form a neutron Step 2: How does Hydrogen fuse to form 1 Helium atom? Step 3: How does Helium fuse to form 1 Carbon Atom? Step 4: Draw the 4 Stages in the Life Cycle of a Low Mass Star and show which of each of the previous Nuclear Rxns were involved at each stage. Using the BSCS Book pgs223 – 237: Divide Poster into 4 Rows: Make Row 1 Half the Size of the other 3 For Each Step = 1. Build+ Label a Playdoh Model of that step 2. Draw + Label the Nuclear Reaction Equations involved in that step

Recipe for a Star Activity Step1: How does a proton + electron form a neutron Step 2: How does Hydrogen fuse to form 1 Helium atom? Step 3: How does Helium fuse to form 1 Carbon Atom? Step 4: Draw the 4 Stages in the Life Cycle of a Low Mass Star and show which of each of the previous Nuclear Rxns were involved at each stage. Using the BSCS Book pgs223 – 237: Divide Poster into 4 Rows: Make Row 1 Half the Size of the other 3 For Each Step = 1. Build+ Label a Playdoh Model of that step 2. Draw + Label the Nuclear Reaction Equations involved in that step

Proton and Electron combine to make a Neutron. H Fusion Proton and Electron combine to make a Neutron.

H Fusion 4 11H  42He + Energy

Recipe for a Star Activity Step1: How does a proton + electron form a neutron Step 2: How does Hydrogen fuse to form 1 Helium atom? Step 3: How does Helium fuse to form 1 Carbon Atom? Step 4: Draw the 4 Stages in the Life Cycle of a Low Mass Star and show which of each of the previous Nuclear Rxns were involved at each stage. Using the BSCS Book pgs223 – 237: Divide Poster into 4 Rows: Make Row 1 Half the Size of the other 3 For Each Step = 1. Build+ Label a Playdoh Model of that step 2. Draw + Label the Nuclear Reaction Equations involved in that step

He Fusion  Carbon

Carbon

Recipe for a Star Activity Step1: How does a proton + electron form a neutron Step 2: How does Hydrogen fuse to form 1 Helium atom? Step 3: How does Helium fuse to form 1 Carbon Atom? Step 4: Draw the 4 Stages in the Life Cycle of a Low Mass Star and show which of each of the previous Nuclear Rxns were involved at each stage. Using the BSCS Book pgs223 – 237: Divide Poster into 4 Rows: Make Row 1 Half the Size of the other 3 For Each Step = 1. Build+ Label a Playdoh Model of that step 2. Draw + Label the Nuclear Reaction Equations involved in that step

Low Density Shell High Density Highest Density

Low Mass Star Excited Hydrogen H Fusion in core 4 H  He

Red Giant: 4 Layered Core Non-fusing H Shell Excited H H fusing He fusing C Core Core

Nucleosynthesis Wkst

High Mass Star's Core Excited H H Fusion He Fusion C Fusion O Fusion Ne Fusion Mg Fusion Si Fusion Fe High Mass Star's Core

Making Iron ? Silicon Fusion Si + Si  Ni Then Nickel Decays Ni  Fe

Stellar Life Cycles

Yellow star Main Sequence Blue star Main Sequence Supergiant Red Giant Protostar Planetary Nebula Nebula Supernova Nova White Dwarf Neutron star/Pulsar Black Dwarf 28 28

Hwk 14 2018 1. Nucleosynthesis Wkst 2. Nuclear Rxns Test Next Class