Which of the following is true regarding fossil record?

By analyzing fossil whales, what have scientists found about whales’ evolution over time?

Which of the following correctly states the layers in order from youngest to oldest?

• Younger fossil will be in uppermost layer.

The basic principle used when dating fossils that are found in sedimentary is

• The deepest fossils are the oldest fossils.

Fossil record is incomplete because

• Fossils are continuously found and not all the animals got fossilised.

How does fossil record support the idea that evolution occurred on Earth?

• From fossils we get information about history of life millions of years ago and can conclude the changes between life of that time and now.

The picture shows which type of fossil.                           

• Imprint fossils are formed in clay and silt sediment .

Of all of the organisms that have lived on earth, about what percentage are still known to be alive.                                                                               

• There are so many organisms that extinct after a time period.

__________ are remains of plants and animals that are now extinct.

• Fossils provide knowledge of the ancient world and history of life on earth.

Which term describes all of the fossils that are discovered over time?

• Fossil record helps to know about history of life on earth.

When all the members of a species die off, the species is known to be _________.

• There are so many species which have extincted like Dodo.

Fossils are mostly found in ____________ rocks.

• Sedimentary rocks contain highest amount of fossils.

The theory that states undisturbed layers of rock have the oldest layers on the bottom and the youngest on the top is known as __________.

• The principle States that the oldest layer is at the base and that the layers progressively younger with ascending order in the sequence.

Which of the following is something that does not provide evidence of fossil record?

• Fossils provide knowledge about history of life on earth.

What is true about radioactive elements?

• Radioactive substance emits free neutrons and a non radioactive substance can become radioactive by catching the neutrons.

The law of superposition states that the younger rock layers lie __________ the older layers of rock.

• Age of layers can be calculated on the basis of position of rocks layers.