LOPEZ NATIONAL COMPREHENSIVE HIGH SCHOOL

PLATE BOUNDARIES

Types of Plate and Movement

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Types of Plate Boundaries

Three types of plate boundaries

Know: the different types of Boundaries and exhibited movement.

PLATE BOUNDARIES

Convergent Plate
Divergent
Transform Fault

Divergent Plate

plates move apart, creating a zone of tension

Convergent Plate

moving toward each other, plates collide. Philippine plate & Eurasian plate.

Transform Fault

plates slide or grind past each other without diverging or converging. San Andreas fault bounded by North American & Pacific plate.

Activity 2

Let's Mark the Boundaries

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Activities!

Let's proceed!

Plate Boundaries

Activity 2: Let's Mark the Boundaries!

Objectives

Describe the distribution of active volcanoes, earthquake epicenters, and major mountain belts.
Determine the scientific basis for dividing the Lithospheric plates.

Activity 2: Let's Mark the Boundaries!

Materials

Figure 5: Map of earthquake distribution
Figure 6: Map of active volcanoes of the world
Figure 7: Mountain ranges of the world
marking pens (two different colors)
Two pieces plastic sheet for book cover, same size as a book page

Procedures - PART A

Let's mark the boundaries!

Study Figure 5 showing the earthquake distribution around the world.
Trace the approximate locations of several earthquake “clusters” using a marking pen on one of the plastic sheets.

GUIDE QUESTIONS

Q5. How are earthquakes distributed on the map

GUIDE QUESTIONS

Q8. Where are they located

GUIDE QUESTIONS

Q7. Where are there no earthquakes

GUIDE QUESTIONS

Q8. Why is it important for us to identify areas which are prone to earthquakes

Procedures - PART B

Let's mark the boundaries!

Study the map of active volcanoes in Figure 6.

GUIDE QUESTIONS

Q9. How are volcanoes distributed?
Q10. Where are they located?
Q11. Based on the map, mention a country that is unlikely to experience a volcanic eruption.

Procedures - PART C

Let's mark the boundaries!

On the second plastic sheet, sketch the approximate locations of several volcanoes using a marking pen.
Place the earthquake plastic sheet over the volcano plastic sheet.
Compare the location of majority of earthquake epicenters with the location of volcanoes around the world

GUIDE QUESTIONS

Q12. How will you relate the distribution of mountain ranges with the distribution of earthquake epicenters and volcanoes?
Q13. What do you think is the basis of scientists in dividing Earth’s lithosphere into several plates?

Thank you!

"Keep on learning because it leads us to #Success."

@dennszz.

Collision of Plate Boundaries

Locating the Earthquake Epicenter

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Center of an Earthquake

Triangulation Method

Objective: Find the Epicenter of an earthquake using Triangulation Method

Materials:

hypothetical records of earthquake waves
Philippine map
drawing compass and ruler

Triangulation Table

Data. Computation is required!

RECORDING STATION	TIME DIFFERENCE	DISTANCE	COMPUTED
Batangas	44.8
Puerto Princesa	32
Davao	38.4

NOTE: Time difference - difference in the arrival time of P-wave and S-wave in seconds.

Things to do in Triangulation

FOLLOW the STEPS ACCORDINGLY

STUDY THE DATA

Shown is the difference between the arrival time of P-waves and S-waves.
COMPUTE THE DISTANCE

Distance from the epicenter from each station using formula d=(Td/8sec)x 100km.
CHOOSE ONE OF THE RECORDING STATION

Measure the computed distance on the map scale. the scale of the map in Figure 3 is 1.5 cm: 200 km.Set your compass for that computed distance
AGAIN, ON THE OTHER RECORDING STATION

Center your compass, then draw a circle.
REPEAT STEPS 3 & 4 FOR THE REST OF THE STATIONS.

You should get three circles that intersect or nearly intersect at a point. This intersection is the epicenter.

GUIDE QUESTIONS

Q1. Where is the epicenter of this hypothetical earthquake?

Q2. What difficulty will you encounter if you only have data from two recording stations?

Difference P & S Waves

GUIDE QUESTIONS

Q3. The distance-time graph above shows that the S-P interval is aout 10 minutes. What is the distance of the epicenter from the seismic station?

Q4. What do you think is the importance of determining the epicenter of an earthquake?

Determining the location of earthquake epicenters plays a vital role in laying the foundations of plate tectonics.

DepEd LM for Grade 10 Science, 2014

That's how!

Now you know!

Thank you!

"Keep on learning because it leads us to #Success."

@dennszz.

Sunday, June 28, 2020