Parts Of A Flower Flowers are not just beautiful; they are fascinating structures that play a crucial role in plants' life cycles.  Petals: Often brightly colored, petals attract pollinators such as bees, butterflies, and birds.  Sepals: These green, leaf-like parts...

What is Gravity? Gravity is a fundamental force of the universe that pulls objects towards each other.  Gravity on Earth Gravity gives weight to physical objects and causes them to fall toward the Earth when dropped.  The acceleration due to gravity on Earth's surface...

What Causes An Earthquake? The Earth’s upper layer is made of giant slabs of rock called tectonic plates, which move very slowly. An earthquake occurs when the tectonic plates pull apart, slide past or bump into each other.  Faults: Cracks in the Earth's crust where...

Formation of Volcanoes The Earth's surface is made up of large pieces called tectonic plates. These plates slowly move over the Earth's mantle, a layer of hot rock. Volcanoes are formed when the earth's plates move together (convergent) or apart (divergent).  Molten...

Life Cycle of a Star There are seven stages in the life cycle of a star. The mass of a star determines how radiantly it shines and how it dies. Let’s look at the Sun's life cycle, a medium-sized star. Nebula - Stars are born from enormous clouds of gas and dust called...