Gr.6 Chemistry

The process of changing species is called ______________

• revolution

• evolution

• mutation

The glaciers have a period of melting every year during the ……….months.

• autumn

• summer

• spring

Varves then can be used to measure over ………………years back in time.

• 14000

• 13000

• 15000

The word atom means ………………………………..

• divisible

• multipliable

• indivisible

The two most recent layers of rocks and time period are …………………..

• Tertiary and Quaternary

• Triassic and Jurassic

• Precambrian

Mammal fossils are only found in the……………………..period.

• Triassic

• Jurassic

• Cambrian

Some fossils are formed by the things they have left behind such as eggs solid waste and tracks. They are known as........................

• Index fossils

• Trace fossils

• fossils fuels

Which animal group has the longest fossil record?

• molluscs

• reptiles

• fish

The age of the Earth is ..........................

• 4.6 billion years

• 5.6 billion years

• 4.9 billion years

............................formed a second set of stars called second generation.

• Supernova

• Nebula

• Sun