Answer: The 4 layers that make up the earth is the crust, mantle, inner core and outer core.
Explanation: The crust, which is a main layer is where we live on. Without the crust, we'll be standing on the mantle! The temperate of the crust is 392 Fahrenheit! The crust is 30 km thick. The mantle is the second layer of the earth. It's below the crust and it's hot, dense and semi-solid. It's mostly made of iron, magnesium and silicon. It can reach as hot as 1000 Celsius (1832 Fahrenheit)! It's about 2900 km thick! Anyone who standing on it will melt! The inner core is the 3rd layer. It's below the mantle and made out of liquid iron (molten iron) and nickel. It is about 5,200 Celsius (9392 Fahrenheit). Now that is hot! Hotter than a fire even a heater! The last layer is the outer core. It's made out of liquid iron and nickel, like the inner core. The outer core can be as hot as 5500 Celsius (8132 to 9932 Fahrenheit!)
Answer:
circulate blood around the body via the heart, arteries an veins, etc
Explanation:
Answer:
thats just how the cookie crumbles.
Explanation:
While some species evolve, due to a thriving enviroment and cross breeding, the world is dying. Millions of habitats have been destroyed, causing some animals to not survive in the wild. Like pandas, when their homes were being destroyed, they starved. When they starved, they didn't reproduce. On and on and on.
The heart is in the diastole phase. In the diastole phase, the heart muscle relaxes and allows the chambers to fill with blood in preparation for the next cycle. In the systole phase, on the other hand, the heart muscles contract and this causes the ejection of blood into the aorta and pulmonary trunk.