a

active ·adjective (VOLCANO)

Definition: An active volcano could throw out hot gas, melting rock, thick dust, etc., at any time. Level: C1

b

bacteria ·noun

Definition: very small living things that sometimes cause disease Level: C1

e

ecology ·noun

Definition: the relationship between living things and the environment, or the scientific study of this Level: C1

e

extinct ·adjective

Definition: If a type of animal is extinct, it does not now exist. Level: C1

e

extinction ·noun

Definition: when a type of animal no longer exists Level: C1

g

geology ·noun

Definition: the study of rocks and soil and the physical structure of the Earth Level: C1

h

habitat ·noun

Definition: the natural environment of an animal or plant Level: C1

i

iceberg ·noun (ICE)

Definition: a very large piece of ice in the coldest waters of the ocean Level: C1

l

log ·noun

Definition: a thick piece of tree trunk or branch, especially one cut for burning on a fire Level: C1

p

palm ·noun (TREE)

Definition: a tall tree with long leaves at the top that grows in hot countries Level: C1

r

rocky ·adjective (WITH ROCKS)

Definition: with lots of rocks Level: C1

s

settle ·verb (DUST/SAND, ETC.)

Definition: to move to a lower level and stay there Level: C1

s

spring ·noun (WATER)

Definition: a place where water comes out of the ground Level: C1

s

state ·noun (COUNTRY)

Definition: a country or its government Level: C1

s

straw ·noun

Definition: the long, dried stems of plants such as wheat, often given to animals for sleeping on and eating Level: C1

s

stretch ·noun

Definition: a continuous area of land or water Level: C1

t

tobacco ·noun

Definition: the dried leaves of a plant with the same name that are inside cigarettes and cigars and smoked in a pipe Level: C1

v

vine ·noun

Definition: a plant with a twisted stem that climbs things or grows along the ground Level: C1