Choose the correct alternative.

1. Which of the following is not a living organism?

bacterium
fungus
plant
animal
robot

2. Limestone cliffs can be made out of ancient

granite.
coral reefs.
quartz sand.
ice.
concrete.

3. The petrified remains of ancient living organisms are called

porcelains.
phosphorous.
fluorides.
fossils.
pharaohs.

4. Water can erode limestone and create

stalactite caverns.
ore mines.
fossils.
bogs.
glaciers.

5. Crude oil and natural gas come from

oil refineries.
ancient forests.
ancient marine organisms.
seashells.
oil leaks.

6. Coal comes from

grills.
ancient plants.
granite and quartz.
supernovas.
burnt rock.

7. What is a characteristic feature of plastics?

They decompose easily.
They conduct electricity well.
They consist of long molecule strands.
They consists of short molecule strands.
They are made from sand.

8. What kind of plastic is used to make plastic bags?

PE plastic
PET plastic
PS plastic
PP plastic
PVC plastic