First, the foods that could be making it hard to poop: Consider your ABCs -- or applesauce, bananas, and cereal, Dr. Morton says. Too much of any of these, especially cereal, could cause constipation in your baby; also, keep an eye on dairy products that are popular first foods for babies, such as cheese and yogurt.
There are three kinds of plate tectonic boundaries: divergent, convergent, and transform plate boundaries. This image shows the three main types of plate boundaries: divergent, convergent, and transform. Image courtesy of the U.S. Geological Survey.
Where convection currents diverge near the Earth's crust, plates move apart. Where convection currents converge, plates move towards each other. The movement of the plates, and the activity inside the Earth, is called plate tectonics. Plate tectonics cause earthquakes and volcanoes. The point where two plates meet is called a plate boundary. Earthquakes and volcanoes are most likely to occur either on or near plate boundaries. The map shows the world's tectonic plates and the distribution of earthquakes and volcanoes. The Earth's plates move in different directions.