Is an orca a shark or whale?

Is an orca a shark or whale?

The killer whale (Orcinus orca), also referred to as the orca whale or orca, and less commonly as the blackfish, is a toothed whale belonging to the oceanic dolphin family. Killer whales are found in all oceans, from the frigid Arctic and Antarctic regions to tropical seas.

How long is a typical freight train?

The average freight train is about 1 to 1¼ miles in length (90 to 120 rail cars). When it’s moving at 55 miles an hour, it can take a mile or more to stop after the locomotive engineer fully applies the emergency brake. An 8-car passenger train moving at 80 miles an hour needs about a mile to stop.

Is it true that moss grows on the northside of a tree?

Still, whether or not moss grows predominantly on the north side of trees depends on where you live. “There is a tendency for moss to grow on the northern side of a tree—in the northern hemisphere,” he says. “In the southern hemisphere mosses would have a tendency to grow on the south, shady, side of trees.”

How many countries have a mcdonalds?

McDonald’s Corp. is the world’s largest restaurant chain, with 34,480 restaurants in 119 countries. The burger chain has famously gone where few fast-food chains have gone before as a symbol—for better or worse – of capitalism.

How many species of fish are in the great barrier reef?

More than 1,500 fish species live on the reef, including the clownfish, red bass, red-throat emperor, and several species of snapper and coral trout. About 5,000 species of mollusks live on the reef.

Who discovered plasma in blood?

He discovered that the plasma could be dried and then reconstituted when needed. His research served as the basis of his doctorate thesis, “Banked Blood,” and he received his doctorate degree in 1940. Drew became the first African-American to earn this degree from Columbia.

What determines the properties of an element?

These outer-shell electrons (called valence electrons) are important in determining the chemical properties of the elements. An element’s chemical properties are determined by the way in which its atoms interact with other atoms.

Why do they call it a penny?

The British pound was not divided into 100 cents like our dollar, but its smallest part was called a penny, and that’s why we call our cent a “penny” today. But for more than one, the British called them “pence” while ours are called “pennies.”