Lesson Exemplar for Science – Quarter 4 Lesson 1 (Grade 7)

Is it a Fact or a Bluff? The Pacific Ring of Fire covers a chain of shoreline countries around the Atlantic Ocean.

• Bluff

• Fact

Is it a Fact or a Bluff? The Pacific Ring of Fire is where wildfire often occurs.

• Bluff

• Fact

Is it a Fact or a Bluff? The movement of the ground is responsible for the geological activities on the Pacific Ring of Fire.

• Fact

• Bluff

Worked Example: Refer to the map labeled “Pacific Ring of Fire.” What do you see in the picture?

• A horseshoe-shaped belt of volcanoes and plate boundaries around the Pacific Ocean

• A single volcano in the Atlantic Ocean

• A weather map of wind directions

• A highway network across continents

Worked Example: Refer to the map labeled “Pacific Ring of Fire.” Why is it called the Pacific Ring of Fire?

• Because it encircles the Pacific Ocean with many active and dormant volcanoes

• Because wildfires surround the Pacific coastlines each summer

• Because it forms a ring of deserts around the Pacific

• Because ocean currents create a ring of storms

Worked Example: Refer to the map labeled “Pacific Ring of Fire.” Why are there a lot of volcanoes in the Pacific Ring of Fire?

• Because of the movement, collision, and destruction of lithospheric plates

• Because the region has the hottest air temperatures on Earth

• Because rainfall is high around the Pacific

• Because of human mining activities

Worked Example: Refer to the map labeled “Pacific Ring of Fire.” Aside from volcanic eruptions, do you know other phenomena in the Pacific Ring of Fire?

• Earthquakes also occur in the Pacific Ring of Fire

• Hurricanes form only in the Pacific Ring of Fire

• Tornadoes occur daily in the Pacific Ring of Fire

• Auroras are common in the Pacific Ring of Fire

Guide Questions: How is the location of the places related to its seismic activity?

• The countries encircle the Pacific Ocean where many plate boundaries trigger frequent earthquakes and volcanic eruptions

• Their distance from oceans prevents earthquakes from occurring

• They are far from any tectonic plates, so earthquakes are rare

• Their cold climate causes more storms instead of quakes

• Normal fault

• Reverse (thrust) fault

• Strike-slip fault

• Normal fault

• Reverse (thrust) fault

• Strike-slip fault