Part 1: Planet Formation: ) Plancts are formed when a big cloud of dust and gas (called a __ condenses and a protostar is formed. Around that protostar gravity pulls and stretches the gas into a flat circle called the __ In this disk condensation starts to clump elements by weight. Heavy elements are __ to the sun, meaning planets that form near the sun are usually heavier. Light elements are __ from the sun because they were easy to push away. Far planets made of these light elements are typically made of gas. We sort these planets into two categories, __ and __ based on composition and size.

## Step 1<br />The first blank in the text refers to the initial stage of planet formation, which is the condensation of a large cloud of dust and gas. This process is known as a nebula.<br /><br />## Step 2<br />The second blank refers to the flat circle that forms around the protostar due to the force of gravity. This is known as the accretion disk.<br /><br />## Step 3<br />The third blank refers to the process where heavy elements in the accretion disk clump together due to their weight. This process is known as accretion.<br /><br />## Step 4<br />The fourth blank refers to the fact that light elements are pushed away from the sun due to their lower density and the force of the solar wind. This is known as being blown away.<br /><br />## Step 5<br />The fifth blank refers to the fact that planets made of light elements are typically made of gas. These are known as gas giants.<br /><br />## Step 6<br />The sixth blank refers to the two main categories of planets based on their composition and size. These are terrestrial planets and gas giants.