1-26-18 Lab Report/Seafloor Spreading cont.

Do Now: Take out your homework and answer the following questions in your Science Notebook 1. As the seafloor continues to spread apart, the older oceanic crust moves in which direction with respect to the mid- ocean ridge? A. toward it B. above it C. away from it D. under it 2. Today’s magnetic field is described as having which of these? A. reversed polarity B. normal polarity C. Magnetic reversal D. no polarity 3. In which state do magnetized objects reverse themselves to point south? C. seafloor spreading D. magnetic polarity

CONGRATULATIONS to the Science Fair Top 16 (7th grade) Trey Miranda Leandro Avalos Kayla Browne D’Janique Thomas Rachael Ramos Jadyn Delgado Daniel Rojas Leah Bruzon Whitney Kinnison Samori Williams-Remy Jacob Hurley Ryleigh Meadows Logan Leshnov Avion Jackson Ashlee Rosales Cory Conner

Lab Report Instructions Due Friday, 2/2/18 Materials Print out and submit the following parts of your science fair project in this order: Procedure Data Table(s) Graph(s) Title Page Logs/Pictures (optional) Title of project Your name, date, class period Results Abstract (Cambridge) Conclusions Purpose/Research Question Bibliography Background Research A template is posted on the class website, www.scascience7.weebly.com/news Variables Hypothesis

Post-It Questions Follow-Up

Continental Drift Quiz Answers Cambridge Comprehensive 6 points total 6/6 = 100% 5.5/6 = 91.7% 5/6 = 83.3% 4.5/6 = 75% 4/6 = 66.7% 3.5/6 = 58.3% 10 points total You should be able to calculate these percentages!

Continental Drift Quiz Answers - Cambridge Wegener’s hypothesis of continental drift states that continents are in constant motion on the surface of the Earth. Wegener noticed that the shapes of the coastlines of the continents fit together much like pieces of a puzzle. He used this observation to hypothesize that the continents were once joined. Fossils of this plant were discovered in separate continents (South America, Africa, India, Antarctica, and Australia). The plant’s spores could not have blown across the oceans that now separate the continents. Also, these plants grew in a swampy environment. Some of the places where the fossils were discovered have cold climates. This meant that the continents had to have been in different positions when the plants were alive. Coal beds in Antarctica and evidence of glaciers in areas that are now near the equator are two types of climate data that are used to support continental drift. Volcanic rocks and mountains that have similar chemistries and ages in different continents suggest that these two continents were once joined. Wegener could not explain the forces that caused the continents to move or measure how fast they moved.

Continental Drift Quiz Answers - Comprehensive True False

Quiz Retake Requirement Earned less than 80% Complete Additional Targeted Practice – the Continental Drift Hypothesis worksheet When finished, submit to Mr. Santos when ready to complete quiz.

Review of Key Concept Builder Homework The topography is not ___ a magnetic signature flat Magnetic stripes represent ___ Mountain ranges stretch ____ crust formed at different times along the seafloor More thermal energy leaves ___ Mountain ranges are located ___ at the mid-ocean ridges in the middle of the oceans Less thermal energy leaves ___ Ocean mountain ranges are longer ___ from beneath abyssal plains The sediment that is closest to the mid-ocean ridge is ___ than the sediment that is farther away from the ridge than any on land Parallel magnetic stripes are located ___ younger on either side of the mid-ocean ridge Each stripe has ___

Seafloor Spreading Quiz Tuesday, 1/30/18 What is seafloor spreading? What evidence supports seafloor spreading?

Mapping the Ocean Floor Documentary https://youtu.be/83YSzkB4L7Q?t=32m25s Take out a separate piece of paper. For the remainder of class, we will watch part of the documentary entitled “Draining the Ocean”. As you watch, write down 3 things that you learn.

Activity: Modelling the Theory of Seafloor Spreading Materials: Sheet of paper Scissors Red, yellow, blue, and green Crayons/Markers/Colored pencils Tape Follow the directions on your handout to create the model of seafloor spreading. Answer the questions on #5 and #6