1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
BabaBlast [244]
4 years ago
9

What really happened to the dinosaurs​

History
2 answers:
musickatia [10]4 years ago
4 0

Answer:

The Cretaceous-Tertiary extinction event, or the K-T event, is the name given to the die-off of the dinosaurs and other species that took place some 65.5 million years ago. For many years, paleontologists believed this event was caused by climate and geological changes that interrupted the dinosaurs' food supply.

Explanation:

Ede4ka [16]4 years ago
3 0
They were hit by an asteroid about 65 million years ago
You might be interested in
How did invention of plastic affect technology?
kipiarov [429]
Plastic is a word that originally meant “pliable and easily shaped.” It only recently became a name for a category of materials called polymers. The word polymer means “of many parts,” and polymers are made of long chains of molecules. Polymers abound in nature. Cellulose, the material that makes up the cell walls of plants, is a very common natural polymer.

Over the last century and a half humans have learned how to make synthetic polymers, sometimes using natural substances like cellulose, but more often using the plentiful carbon atoms provided by petroleum and other fossil fuels. Synthetic polymers are made up of long chains of atoms, arranged in repeating units, often much longer than those found in nature. It is the length of these chains, and the patterns in which they are arrayed, that make polymers strong, lightweight, and flexible. In other words, it’s what makes them so plastic.

These properties make synthetic polymers exceptionally useful, and since we learned how to create and manipulate them, polymers have become an essential part of our lives. Especially over the last 50 years plastics have saturated our world and changed the way that we live.

The First Synthetic Plastic

The first synthetic polymer was invented in 1869 by John Wesley Hyatt, who was inspired by a New York firm’s offer of $10,000 for anyone who could provide a substitute for ivory. The growing popularity of billiards had put a strain on the supply of natural ivory, obtained through the slaughter of wild elephants. By treating cellulose, derived from cotton fiber, with camphor, Hyatt discovered a plastic that could be crafted into a variety of shapes and made to imitate natural substances like tortoiseshell, horn, linen, and ivory.

This discovery was revolutionary. For the first time human manufacturing was not constrained by the limits of nature. Nature only supplied so much wood, metal, stone, bone, tusk, and horn. But now humans could create new materials. This development helped not only people but also the environment. Advertisements praised celluloid as the savior of the elephant and the tortoise. Plastics could protect the natural world from the destructive forces of human need.

The creation of new materials also helped free people from the social and economic constraints imposed by the scarcity of natural resources. Inexpensive celluloid made material wealth more widespread and obtainable.

3 0
3 years ago
Which of the following are major seasonal gatherings of the inupiaq?
scoundrel [369]
The seasonal gatherings are going to occur in the summer<span />
8 0
3 years ago
The president has called Ebola an international crisis and a threat to national security. Why is this disease considered a threa
Anit [1.1K]

Answer:

I believe the answer is A

Explanation:

hope this helps

4 0
3 years ago
1. The religion of Islam began when a prophet named ______________ was given the word of God in a cave outside of Mecca
UkoKoshka [18]

Answer:

Mohammed

Explanation:

5 0
3 years ago
A Russian director monster in stanislavski developed a system of
Scorpion4ik [409]
It was based on his plan of Experiencing. 

But it was known as Stanislavski's system. 
8 0
3 years ago
Other questions:
  • Match the reformer in column a to his or her contribution to the Reformation movement in column b.
    15·2 answers
  • Which of the following was most responsible for Napoleon's rise to emperor of France?
    9·2 answers
  • Although lincoln lost the 1858 election, the lincoln-douglas debates won him wide support for the 1860 presidential election.
    14·1 answer
  • If you want to analyze the total annual production of goods, services, and structures within a nation, which economic figure sho
    14·2 answers
  • The Jamestown settlement was saved in a large part by the development of the highly profitable crop
    14·2 answers
  • Is this statement True Or False? A complex civilization can be defined as a city with a large population.
    13·2 answers
  • Thomas paine argued in common sense that
    8·2 answers
  • This individual was a leading figure in the Enlightenment.
    15·2 answers
  • I REAALLIY NEED HELP WITH THIS QUESTION George Washington and the new Continental Army first drove the British out of
    11·2 answers
  • Help asap and I will give brainliest pleaseeee answer correctly
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!