BCA: 4th Grade: Social Studies: Chapter 1: Early Humans

an object made or used by humans long ago

• artifact
• relic
• fossil
• tool

a time period of 100 years

• decade
• millennium
• quarter century
• century

the order in which events occur

• timeline
• chronological order

• order of operations
• years

the long-term trends in weather elements and atmospheric conditions

• climate

• weather

• seasons

• atmosphere

a time period of 10 years

• century
• decade
• biennium
• quinquennial

one of seven large bodies of land on Earth

• peninsula
• ocean
• continent
• island

to dig out material

• excavate
• fill
• cover
• bury

a member of a nomadic group of people who live chiefly by hunting, fishing and harvesting wild food

• settler
• hunter-gatherer
• fisherman
• farmer

a physical feature of the Earth's surface, such as a desert, mountain, or river

• plateau
• ocean
• valley
• landform

to move from one country or place to another

• migration
• displacement
• relocation
• immigration