1. Directions: Write the letter of the correct answer on the space provided. 1. On which layer of the earth do we live? a. crustb. mantle c.core d. atmosphere _2. What do you call the sudden trembling of the ground? a. Earthquake b. Typhoon C. Volcanic eruption d. Landslide 3. What is the instrument that measures crustal plates are weak that results to frequent earthquakes? a. seismogram c Richter Scale b. seismograph d. barograph -4. What changes on the earth surface happen due to the movements of the crustal plates? a. The environment became polluted C. Climate and weather changes b. The poles became cooler d. Volcanoes mountains and trenches were formed 5. It refers to the effects of the earthquake as shown in the destruction of buildings, infrastructures, crops and number of casualties. a. Epicenter b. Focus C. Intensity d. Magnitude II. Identify whether the safety measure is practiced Before, During or After an earthquake or volcanic eruption. Write your answer on the space provided. occur 6. Familiarize yourself with your place of work and residence. _7. If you are Indoor, stay there until it's safe to go outside. _8. Avoid touching wires from fallen posts and staying under trees. _9. Always secure an emergency kit at home. _10. Watch news on television or listen over the radio for reports about the possible eruption of a Volcano.
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1. A. The crust
The crust is what you and I live on and is by far the thinnest of the layers of earth. The thickness varies depending on where you are on earth, with oceanic crust being 5-10 km and continental mountain ranges being up to 30-45 km thick.
2. A. An Earthquake
An earthquake is an intense shaking of Earth's surface. The shaking is caused by movements in Earth's outermost layer.
3. B. Seismographs
Seismographs are instruments used to record the motion of the ground during an earthquake.
4. D. Volcanoes mountains and trenches were formed
Plate motions cause mountains to rise where plates push together, or converge, and continents to fracture and oceans to form where plates pull apart, or diverge. The continents are embedded in the plates and drift passively with them, which over millions of years results in significant changes in Earth's geography.
5. C. Intensity
Ground shaking is the primary cause of earthquake damage to man-made structures. Many factors influence the strength of earthquake shaking at a site including the earthquake's magnitude, the site's proximity to the fault, the local geology, and the soil type.
6. Before
7. During
8. After
9. Before
10. Before