GRADE 7 Social Studies - Fill-in-the-Blank Flashcards (Unit 1 through Unit 7)

Fill-in-the-blank flashcards covering key concepts from Unit 1 to Unit 7. Use to test recall of core ideas and terminology.

The four external components of the Earth are lithosphere, hydrosphere, biosphere, and __.

Atmosphere

The Earth’s interior is divided into three main layers: crust, mantle, and __.

Core

The two main types of Earth's crust are continental crust and __ crust.

Oceanic

Continental crust is rich in silica and __; oceanic crust is rich in silicon and __.

Aluminum

Continental crust is rich in silica and aluminum; oceanic crust is rich in silicon and __.

Magnesium

The Earth is not a perfect sphere; it is an oblate __.

Spheroid

The axis tilt is about __ degrees.

23.5

The two days when day and night are equal in length are called __.

Equinoxes

The solstice in June 21 is the __ solstice.

Summer

One revolution around the Sun takes about __ days.

365.25

There are eight planets; they are divided into inner (terrestrial) and __ (gas giants).

Outer

Pluto was reclassified as a __ planet by the IAU in 2006.

Dwarf

The Sun is about __ million kilometers away from Earth.

150

The Sun contains about __% of the solar system’s mass.

99.8

The Greek word Planetai means __.

Wanderers

An asteroid belt is located between the orbits of and .

Mars; Jupiter

A meteoroid that reaches Earth’s surface is called a __.

Meteorite

There are __ constellations in the night sky.

88

Lucy, the famous fossil, is Australopithecus __.

afarensis

Australopithecines appeared in Africa around __ million years ago.

6

Modern humans (Homo sapiens) appeared about __ years ago.

40,000

Archaeology is the science that digs out material objects and __ of the past.

Fossils

Lucy (Australopithecus afarensis) was discovered at Hadar in the Afar region of __.

Ethiopia

Doubling time is given by the formula Doubling Time = 70 ÷ __.

growth rate

The three main belts of high population density include Asia’s East Asia, Peninsular Europe and North-eastern North __.

America

The Oromo social-political system is the __; a cycle of eight years with ten age grades.

Gada

Gondar was founded as the fixed capital by King __ in 1636.

Fasiledes

Aksumite coins were minted in gold, silver and __.

Bronze

The Nine Saints introduced monastic life and established many in Ethiopia.

Churches

The Zagwe dynasty is best remembered for its rock-hewn __ in Lalibela.

Churches

The Golden Age of Gondar is roughly from 1636 to __.

1706

The Zemene Mesafint is the Era of __ lasting from 1769 to 1855.

Princes

Gateway of Islam to Ethiopia via Dahlak and Zeila; Zeila is a port on the Gulf of __.

Aden

One gateway of Islam into Ethiopia was the port of Zeila on the Gulf of __.

Aden

The 19th-century Ethiopian long-distance trade used salt bars called __ as a medium of exchange.

Amole

The leader of caravan merchants in the 19th century was called a __.

Negadras

The term Jabarti refers to __ merchants in northern Ethiopia.

Muslim

The Oromo Muslim merchants in the southwest were known as __.

Afkala

The Nine Saints arrived toward the end of the __ century A.D. to Ethiopia.

Fifth

The Great Wall of China is a famous example of the achievements of Ancient __.

China

The ancient Chinese writing system used symbols representing words and is called __.

Logographic

Ancient Greece city-states were called __.

Polis

The capital of the Byzantine Empire after Constantinople became its center is __ (now Istanbul).

Constantinople

Crusades were religious wars between Christian Europe and the Muslim Seljuk Turks to secure the holy land of __.

Jerusalem

Mohammed’s journey from Mecca to Medina is called the __ (Hijra).

Hejira