GROWTH DEVELOPMENT CHILD
SUMMATIVE ASSESSMENT
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Protostar
|
|
|
White Dwarf
|
|
|
Black Hole
|
|
|
Planetary Nebula
|
Detailed explanation-1: -A nebula is a large cloud of gas and dust. Gravity can pull some of the gas and dust in a nebula together. The contracting cloud is then called a protostar.
Detailed explanation-2: -How is a Protostar Formed? Inside a nebula, there are areas where gravity causes dust and gas to “clump” together. As these “clumps” gather more and more mass their gravitational pull increases, forcing more atoms together. This process is known as accretion, and the result is a protostar.
Detailed explanation-3: -As the gas cloud collapses, the gas heats up and starts to radiate. In effect gravitational energy is turned into heat and then light. The gas cloud continues to collapse and the temperature increases until the pressure on the inside is high enough to counteract gravity.
Detailed explanation-4: -The Short Answer: A nebula is a giant cloud of dust and gas in space. Some nebulae (more than one nebula) come from the gas and dust thrown out by the explosion of a dying star, such as a supernova. Other nebulae are regions where new stars are beginning to form.