WorksheetsFrom the first forms of life to the Cambrian explosion
Total questions: 10
Worksheet time: 8mins
What is referred to as a chemical soup?
Mineral-rich hot water released by underwater volcanic activity.
Mr Shivairo's favorite soup
Ocean water full of brown algea
Shallow ocean water inhabited with stromatolites
What were the first forms of life?
Stromatolites
Bacteria
Sponges
Trilobites
What did stromatolites do?
They produced sugars.
They created iron ore.
They cleaned ocean water.
They produced oxygen.
What is photosynthesis?
A new photo-editing software
The respiration process of plants
The production of sugars with the help of sunlight.
The chemical process for developing films
What is iron oxide?
Iron ore
Rust
A special magnet
Iron used for construction work
What was the name of the first supercontinent?
Laurasia
Gondwana
Pangea
Rodinia
What caused the formation of snowball Earth?
Rock surfaces absorbed CO2.
The sun did no longer shine so intensively.
An meteorite collided with Earth bringing lots of ice.
The increased greenhouse-effect.
How did Earth get out of the snow ball state?
The sun melted the ice.
By volcanoes releasing CO2 into the atmosphere, creating stronger greenhouse-effect.
The inside of the earth warmed up thus melting the ice.
Due to meteorites bombarding the Earth.
Cells with a defined nucleus are
brown algea
prokaryotes
green algea
eukaryotes
How do mountains form?
By continents colliding
By fumaroles
By volcanic activity
By rocks accumulating
