Grade 8 earthquakes and volcanoes quiz

📚 Quick Study Guide

• 🌋 Volcanoes: Openings in the Earth's crust where molten rock (magma), gases, and ash erupt.
• 🔥 Magma vs. Lava: Magma is molten rock beneath the Earth's surface, while lava is molten rock that has erupted onto the surface.
• 🌍 Tectonic Plates: The Earth's lithosphere is divided into tectonic plates that constantly move and interact, causing earthquakes and volcanic activity.
• 💥 Earthquakes: Sudden releases of energy in the Earth's crust that create seismic waves.
• 📏 Richter Scale: A logarithmic scale used to measure the magnitude of earthquakes. Each whole number increase represents a tenfold increase in amplitude.
• 🌊 Seismic Waves: Energy waves that travel through the Earth, caused by earthquakes, volcanic eruptions, or explosions. There are P-waves (primary), S-waves (secondary), and surface waves.
• 🧭 Fault Lines: Fractures in the Earth's crust where tectonic plates move past each other. Most earthquakes occur along fault lines.

Practice Quiz

1. What is molten rock beneath the Earth's surface called?
   1. A) Lava
   2. B) Magma
   3. C) Ash
   4. D) Tuff
2. Which of the following is NOT a type of seismic wave?
   1. A) P-wave
   2. B) S-wave
   3. C) T-wave
   4. D) Surface wave
3. What causes earthquakes?
   1. A) Volcanic eruptions
   2. B) Movement of tectonic plates
   3. C) Erosion
   4. D) Weather changes
4. What instrument is used to measure the magnitude of an earthquake?
   1. A) Barometer
   2. B) Thermometer
   3. C) Seismograph
   4. D) Richter Scale
5. What is the name for openings in the Earth's crust where magma erupts?
   1. A) Mountains
   2. B) Valleys
   3. C) Volcanoes
   4. D) Plateaus
6. Where do most earthquakes occur?
   1. A) In the ocean
   2. B) Along fault lines
   3. C) In deserts
   4. D) On mountains
7. What are the giant sections that make up the Earth's crust called?
   1. A) Continents
   2. B) Tectonic plates
   3. C) Volcanoes
   4. D) Mountains