Plate tectonics crossword · Grade 7

The crossword clues

Directions: Read each clue and write the answer in the grid, one letter in each box.

• Across
• 2 Process in which one plate sinks beneath another
• 5 Valley formed where the crust is pulling apart
• 7 Scientist who proposed continental drift in
• 8 Deep, narrow valley in the ocean floor where a plate sinks
• 10 Crack in the crust where rocks slip past each other
• 11 Supercontinent that began breaking apart about 200 million years ago
• 12 Underwater mountain chain where new sea floor forms
• 13 Point on the surface directly above where an earthquake starts
• 14 Plume of heat under a plate that builds island chains like Hawaii
• Down
• 1 Earth's thin, rocky outer layer
• 3 Describes a boundary where two plates move apart
• 4 Describes a boundary where plates slide past each other sideways
• 6 Hot, slowly flowing rock layer beneath the crust
• 9 Describes a boundary where two plates move toward each other
• 11 Giant slab of Earth's crust and upper mantle