Adv Science

Image: AAS Nova Summary: Gravity is the universal force that holds our galaxy together. There are three kinds of galaxies, spiral, elliptical and irregular. A spiral galaxy has a twisting or winding shape, whereas elliptical galaxies look mostly like circles. As for irregular galaxies, they have indistinct shapes which is why they are recognized as irregular. The Milky Way is a spiral galaxy in which the Earth is located in. Fun fact, elliptical galaxies mostly contain older stars. During nuclear fusion, four hydrogen atoms fuse into one helium atom, making hydrogen the most common chemical element in stars. You can see stars during nighttime because of the light they produce during nuclear fusion. The size of a star controls what happens to it for the rest of its life. Inside the Milky Way, the most common types of stars are main-sequence stars. Also, stars range in different temperatures, blue being the hottest and red being the coolest. S...

Image:  YouTube Summary: Chronic stress, or long-lasting stress, can make you feel isolated, overwhelmed and make you have sudden changes in mood. An example of chronic stress is getting overworked on a regular basis. When you are overworked and you are stressed about what you have to complete the size, function, and structure of your brain are affected. After a natural disaster, people are overcome with feeling shock, but that eventually morphs into guilt, depression, and anxiety. People who are suffering from the loss of a loved one, can feel helpless and powerless. The traumatic effects of natural disasters, no matter the natural disaster, show that victims suffer from PTSD and guilt of surviving. This is because, although not all disasters are the same, the survivors all endured a catastrophic, life-changing event, in which they experienced loss. However, the traumatic effects of a natural disaster are different on the brain, depending on the disaster, because...

Question 7:  The Earth is tilted __ degrees. Right Answer:  23.5 Explanation: 23.5 is the correct answer because the Earth's axis is tilted at 23.5 degrees. Question 15:  What type of tide would this arrangement of earth-moon-sun create? Right Answer: Spring tide Explanation: The correct answer is spring tide because when the Moon, Sun, and Earth are in line the Sun and Moons gravitational pulls work together to create spring tides. (Spring tides have really high high tides and really low low tides). Question 17:  Why do we experience the changing of the season on the earth? Right Answer:  the tilt of the Earth's axis Explanation: The correct answer is the tilt of the Earth's axis because as the Earth revolves around the Sun, the tilt of the axis affects the position of the Earth in relation to the Sun which causes a change in seasons throughout the year.  Question 21:  Which solar system event can only occur duri...