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

2. 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

3. 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

4. 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,
Variables
Hypothesis

5. Post-It Questions Follow-Up

6. 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!

7. 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.

8. Continental Drift Quiz Answers - Comprehensive
True
False

9. 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.

10. 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 ___

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

12. Mapping the Ocean Floor Documentary
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.

13. 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