18 terms

Harcourt Social Studies Gr 3 Chapter 4

STUDY
PLAY
environment
the physical and human features that make up a place
human feature
something that people add to a landscape
adapt
to change
natural disaster
an event in nature that causes great harm or damage to people and their property
pictograph
a graph that uses pictures or symbols to show the numbers of things
bar graph
a graph that uses bars to show amounts
modify
to change
tunnel
a path that runs through or under something
canal
a human-made waterway dug across land
terrace
giant steps cut into hillsides for farming
irrigation
the moving of water to dry areas
dam
an earthen or concrete structure that holds back water
reservoir
a human-made lake used for collecting or storing water
pollution
anything that makes a natural resource dirty or unsafe to use
conservation
working to save resources to make them last longer
recycle
to reuse resouces
problem
something that is difficult or hard to understand
solution
an answer to a problem