☰ Contents · Natural science

During an earthquake and review

Lessons 38–39 · 2 lessons · O.E. Tigay, Y.V. Malikova. Natural Science Grade 2, Part 1. Novda Edutainment, 2023; O.E. Tigay. Natural Science Grade 2, Part 2. Novda Edutainment, 2023
38

During an earthquake

Textbook: Part 2, pp. 40–43
GoalKnow simply why earthquakes happen and learn to act calmly and correctly during one.
New words
plate · plitaepicentre · zilzila markaziseismologist · seysmologcalm · xotirjam
Explanation

Earth’s crust consists of big plates. Plates move slowly: they approach or move away from each other. Then the ground shakes: an earthquake. The point where an earthquake is strongest is the epicentre. A scientist who studies earthquakes and their causes is a seismologist. The strength of an earthquake is measured in points: the higher the number, the stronger the quake. In 1966 a strong earthquake struck Tashkent and the city was rebuilt afterwards. During an earthquake stay calm and do not panic.

Worked examples
Indoors, at home or school: get under a table, protect head and neck with our hands, stay away from windows.
Outdoors: go to an open space, stay away from buildings, trees and power lines.
Class activity

Drill “Drop – cover – hold”: the teacher says “Earthquake!”. Children calmly (not in a rush) get under a table, hold a table leg with one hand, cover head and neck with the other and wait 30 seconds. Then leave in an orderly way on an adult’s order (no lifts, no running on stairs). Model: put two pieces of cardboard under a cloth and push them together: how does the cloth wrinkle? Safety: run the drill only under the teacher’s guidance.

Practice
1
What causes an earthquake?
2
Where do we shelter indoors during an earthquake?
3
May we use a lift during an earthquake?