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SCIENCE GUIDE
SCIENCE GUIDE
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1
In which eon the Earth was hot, with many volcanoes and with NO oxygen?
Phanerozoic eon.
Proterozoic eon.
Hadean eon.
Archean eon.
2
A fossil is the remains of a living being that was buried under earth and rocks millions of years ago.
False
True
3
Bacteria and algae (microscopic plants) first appeared in the oceans approximately 3400 billion years ago.
True
False
4
The first unicellular organisms appeared approximately 1000 million years ago.
False
True
5
The first animals, such as jellyfish and simple worms, appeared approximately 600 million years ago.
False
True
6
What have geologists used to determine the age of the Earth over the last hundred years?
Radioactivity of rocks.
Radioactivity of volcanoes
Radioactivity of the rain.
Radioactivity of plants.
7
The first microscopic fungi appeared approximately 1000 billion years ago.
True
False
8
What is the correct order?
Erons-Period-Era-Epoch.
Era-Epoch-Erons-Period
Epoch-Period-Era-Erons.
Erons-Era-Period-Epoch.
9
What are the time periods called when major changes occurred on Earth according to geologists?
Geologists call these time periods "Period".
Geologists call these time periods "Eons".
Geologists call these time periods "Era".
Geologists call these time periods "Epoch".
10
In wich eon the oxygen began to build up in the Earth atmosphere?
Hadean eon.
Proterozoic eon.
Phanerozoic eon.
Archean eon.
11
Dinosaurs appeared approximately 100 million years ago.
False
True
12
In wich eon the animals became common and Pangue split again to become the continents we know today.
Archean eon.
Phanerozoic eon.
Proterozoic eon.
Hadean eon.
13
How can geologists measure the radioactivity of rocks?
Using microwave.
Using an iphone.
Using books and pencils.
Using special detectors.
14
In wich eon the Earth continued to cool and continents of solid rock formed?
Phanerozoic eon.
Hadean eon.
Archean eon.
Proterozoic eon.
15
Approximately how many million years old is the Earth according to the radioactivity dating method?
The Earth is approximately 3000 million years old.
The Earth is approximately 46000 million years old.
The Earth is approximately 2600 million years old.
The Earth is approximately 4600 million years old.
16
Dinosaurs became extinct approximately 50 million years ago?
False
True
