Plate Tectonics
Grade 6 · Science · Earth Processes · Saskatchewan, Canada
Lesson Summary
Earth's crust is broken into large plates that move slowly, causing earthquakes, volcanoes, and mountain formation.
Explanation
The Earth's outer shell is divided into large pieces called tectonic plates that float on the semi-liquid mantle below. These plates move very slowly, only a few centimeters per year, but over millions of years, that movement reshapes the surface of the Earth. Where plates push together, mountains form and volcanoes erupt. Where plates pull apart, new crust forms. Where plates slide past each other, earthquakes occur. The theory of plate tectonics explains why continents are in their current positions and why certain areas experience frequent earthquakes.
Practice Questions
Q1: What happens at a boundary where two plates push together?
Answer: Mountains can form, and one plate may be pushed under the other, sometimes causing volcanoes.
Q2: Why do tectonic plates move?
Answer: Heat from the Earth's interior causes convection currents in the mantle, which slowly push the plates.
Q3: How does plate tectonics explain earthquakes?
Answer: Earthquakes happen when tectonic plates grind against each other, get stuck, and then suddenly release built-up pressure.
People Also Ask
What is Plate Tectonics in Grade 6 Science?+
Plate Tectonics is a lesson in the Earth Processes chapter of Grade 6 Science. It is part of the Saskatchewan, Canada school curriculum and covers key concepts that students need to understand at this level.
What grade level covers Plate Tectonics?+
Plate Tectonics is taught in Grade 6 as part of the Science curriculum in Saskatchewan, Canada.
How can I help my child with Earth Processes in Science?+
Start with the lesson summary and explanation on this page. Practice the questions provided, then use TutorTom for personalized, step-by-step help with Earth Processes topics.