Across
- 2. the Earth's magnetic field is caused by convection currents in the ____________________
- 3. the earth is at the center of the solar system in the ___________ model
- 8. this type of rock has been changed by extreme heat and pressure
- 11. Earth's __________ takes 24 hours; causes day and night
- 12. the process of dense oceanic crust sinking below less dense continental at a trench
- 16. when the lit part of the moon is getting brighter, we say the moon is ______________
- 17. when the lit part of the moon is getting smaller, we say the moon is ______________
- 20. plates collide into each other at a ____________ boundary
- 23. these moons are more than half lit up
- 24. a small rocky body out in space
Down
- 1. _______________ in the mantle causes plate movement
- 4. a chunk of rock, dust and ice that orbits the sun
- 5. a small rocky body that has hit Earth's surface
- 6. if the heat source is removed, a convection current will __________
- 7. this theory explains the formation of the universe
- 9. minerals must be naturally occurring, meaning they can only be ________ in nature, we cannot make them
- 10. the season the northern hemisphere experiences when it is tilted towards the sun is _____________.
- 13. gravity and ________ combine forces to keep our planets in orbit around the sun
- 14. the strength of the force of gravity depends on _______ and the distance between objects
- 15. the moon phase during which a solar eclipse can occur
- 18. this type of rock is formed when melted rock cools and solidifies
- 19. pressure and ____________ increase as you go deeper and deeper inside the Earth
- 21. the Earth experiences seasons because our axis is ___________ as we revolve around the sun
- 22. matching coastlines, climate clues and matching animal _________ on seperated continents were Wegener's evidence for continental drift