Social Science
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Questions and Answers

What is the Latin name for the constellation that represents the 'Queen of Ethiopia'?

  • Andromeda
  • Cepheus
  • Aquarius
  • Cassiopeia (correct)
  • What is the Latin name for the constellation that represents the 'Twins'?

  • Cetus
  • Gemini (correct)
  • Aquarius
  • Apus
  • What is the main reason for the stars not being visible in the day time?

  • The stars are actually very faint and are only visible at night because there is no light from the Sun
  • The Earth's atmosphere scatters sunlight, making it difficult to see the stars during the day (correct)
  • The stars are not actually in the sky during the daytime
  • The Earth's rotation blocks the stars from being seen
  • Which of the constellation names represents a 'Sea monster (whale)'?

    <p>Cetus (B)</p> Signup and view all the answers

    What is the name of the constellation that represents a 'Bird of Paradise'?

    <p>Apus (D)</p> Signup and view all the answers

    What is the English name for the constellation with the Latin name 'Aquarius'?

    <p>Water bearer (A)</p> Signup and view all the answers

    What should you do to make the dots of light visible on the wall in the described experiment?

    <p>Turn off all other lights in the room (B)</p> Signup and view all the answers

    Which of the following planets is NOT an inner planet?

    <p>Saturn (B)</p> Signup and view all the answers

    How many constellations are there in total?

    <p>88 (C)</p> Signup and view all the answers

    What is the approximate thickness of the Earth's mantle?

    <p>2,900 km (A)</p> Signup and view all the answers

    What is the main difference between inner and outer planets?

    <p>Inner planets are closer to the Sun than outer planets. (D)</p> Signup and view all the answers

    What is the name given to the inner planets because of their solid and rocky surfaces?

    <p>Terrestrial planets (A)</p> Signup and view all the answers

    What are the two primary elements that compose the oceanic crust, giving it the nickname 'SIMA'?

    <p>Silicon and Magnesium (C)</p> Signup and view all the answers

    Which of these statements about the Earth's core is incorrect?

    <p>The core is the Earth's thinnest layer. (C)</p> Signup and view all the answers

    Where is the main asteroid belt located in our solar system?

    <p>Between the orbits of Mars and Jupiter (D)</p> Signup and view all the answers

    What is the primary reason the inner core is solid even though it's extremely hot?

    <p>The pressure exerted by the overlying layers is immense. (C)</p> Signup and view all the answers

    What is a meteoroid?

    <p>A piece of an asteroid that breaks off and enters Earth's atmosphere (A)</p> Signup and view all the answers

    Which of the following layers of the Earth is not composed primarily of Silicon and Magnesium?

    <p>Continental Crust (A)</p> Signup and view all the answers

    What happens when a meteoroid enters Earth's atmosphere?

    <p>It vaporizes and becomes a meteor, creating a streak of light in the sky (D)</p> Signup and view all the answers

    What is the difference between a meteor and a meteorite?

    <p>A meteor is a streak of light in the sky, while a meteorite is a rocky body that lands on Earth's surface (C)</p> Signup and view all the answers

    What is the nickname given to the Earth's core because of its primary constituents?

    <p>NIFE (A)</p> Signup and view all the answers

    Why are outer planets called gas giants?

    <p>They are made up of mostly gas and are much larger than inner planets. (A)</p> Signup and view all the answers

    What percentage of the Earth's volume is occupied by the mantle?

    <p>84% (D)</p> Signup and view all the answers

    Which layer of the Earth is responsible for the Earth's magnetic field?

    <p>Outer Core (D)</p> Signup and view all the answers

    What is the estimated age of the Earth?

    <p>4.6 billion years (D)</p> Signup and view all the answers

    What is the shape of the Earth?

    <p>Oblate spheroid (B)</p> Signup and view all the answers

    Which of these is NOT an effect of the Earth's rotation?

    <p>Seasons (A)</p> Signup and view all the answers

    What are the four main components or subsystems of the Earth?

    <p>Lithosphere, hydrosphere, biosphere, and atmosphere (B)</p> Signup and view all the answers

    What are the three main components of the Earth's internal structure?

    <p>Crust, mantle, and core (A)</p> Signup and view all the answers

    What type of rocks are formed from the cooling and solidification of magma or lava?

    <p>Igneous rocks (C)</p> Signup and view all the answers

    How can we obtain knowledge about the Earth's internal structure?

    <p>Both direct and indirect observation (D)</p> Signup and view all the answers

    What is the primary difference between sedimentary rocks, igneous rocks, and metamorphic rocks?

    <p>Their mode of origin (C)</p> Signup and view all the answers

    What does the term 'pre-history' refer to in the context of archeology?

    <p>The time before the development of writing and recording. (A)</p> Signup and view all the answers

    What are fossils used for in archeological studies?

    <p>Identifying the remains of past organisms. (C)</p> Signup and view all the answers

    Which of these is not a sub-species within the genus 'Homo'?

    <p>Australopithecus afarensis (B)</p> Signup and view all the answers

    What is the significance of archeological sites in the study of human evolution?

    <p>All of the above. (D)</p> Signup and view all the answers

    What is the primary purpose of archeology in understanding human evolution?

    <p>To identify and study the remains of past human populations. (C)</p> Signup and view all the answers

    What is the meaning of the term 'bi-pedal' in relation to human evolution?

    <p>Walking upright on two legs. (C)</p> Signup and view all the answers

    What is the key characteristic that distinguishes 'Homo habilis' from other early hominids?

    <p>The ability to make stone tools (B)</p> Signup and view all the answers

    What is the approximate percentage growth rate of Ethiopia's population from 1960 to 2007?

    <p>2.5% (A)</p> Signup and view all the answers

    During which decade did Ethiopia experience the highest population growth rate based on the provided data?

    <p>1970-1984 (B)</p> Signup and view all the answers

    What does the text define as the most common and simple measure of fertility?

    <p>Birth rate (D)</p> Signup and view all the answers

    Which of the following is NOT considered a major component of population dynamics?

    <p>Climate Change (C)</p> Signup and view all the answers

    What is the main reason for the growth of world population, according to the content?

    <p>Human fertility (A)</p> Signup and view all the answers

    What is the primary way a society replenishes itself?

    <p>Human Fertility (C)</p> Signup and view all the answers

    Which of the following is a biological factor affecting population dynamics?

    <p>Fertility (A)</p> Signup and view all the answers

    What is the primary difference between fertility and birth rate?

    <p>Fertility is a broader concept than birth rate (A)</p> Signup and view all the answers

    Flashcards

    Constellations

    Patterns formed by groups of stars in the night sky.

    Total Constellations

    There are 88 constellations that cover the night sky.

    Andromeda

    A constellation known as Princess of Ethiopia.

    Cassiopeia

    A constellation known as Queen of Ethiopia.

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    Cepheus

    A constellation known as King of Ethiopia.

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    Aquarius

    A constellation known as the Water bearer.

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    Cetus

    A constellation known as the Sea monster (whale).

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    Star Visibility

    Stars are not visible during the daytime due to sunlight.

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    Orbits

    The elliptical paths that planets follow around the Sun.

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    Inner planets

    The four planets closest to the Sun: Mercury, Venus, Earth, Mars.

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    Outer planets

    The four planets farthest from the Sun: Jupiter, Saturn, Uranus, Neptune.

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    Asteroids

    Small rocky bodies that orbit the Sun, mainly found in the asteroid belt.

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    Asteroid belt

    Region between Mars and Jupiter where most asteroids are located.

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    Meteoroids

    Small pieces broken from asteroids that orbit the Sun.

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    Meteors

    Meteoroids that vaporize upon entering Earth's atmosphere, creating streaks of light.

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    Meteorites

    Meteoroids that survive entering the atmosphere and land on Earth.

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    Sedimentary Rocks

    Rocks formed by the accumulation of sediments over time.

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    Earth's Age

    The Earth is estimated to be about 4.6 billion years old.

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    Oblate Spheroid

    The Earth's shape, slightly flattened at the poles and bulging at the equator.

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    Rotation of the Earth

    Movement of the Earth spinning on its axis, creating day and night.

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    Revolution of the Earth

    Movement of the Earth around the sun in a fixed orbit.

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    Lithosphere

    The rigid outer part of the earth, consisting of the crust and upper mantle.

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    Hydrosphere

    All the water on the Earth's surface, including oceans and rivers.

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    Rock Classification

    Rocks are classified into igneous, sedimentary, and metamorphic based on origin.

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    Oceanic Crust

    The outer layer of the Earth consisting mainly of Silicon (Si) and Magnesium (Mg), also called SIMA.

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    Mantle

    The thickest layer of the Earth, about 2,900 km thick, composed mainly of Silicon and Magnesium, known as SIMA.

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    Core

    The innermost layer of the Earth made mainly of Nickel (Ni) and Iron (Fe), referred to as NIFE.

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    Inner Core

    The solid part of the Earth's core, where intense pressure compresses molten metal into solid form.

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    Outer Core

    The liquid or semi-liquid layer of the Earth’s core, surrounding the inner core.

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    SIMA

    An acronym for Silicon and Magnesium, referring to the composition of both the oceanic crust and the mantle.

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    NIFE

    An acronym for Nickel and Iron, used to describe the composition of the Earth's core.

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    Earth's Layers

    The Earth consists of three main layers: crust, mantle, and core.

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    Human Evolution

    The gradual development of humans over time from earlier species.

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    Archeology

    The science of studying human history through artifacts and fossils.

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    Fossils

    Remains of dead plants, animals, or humans preserved in rocks.

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    Homo

    The genus that includes modern humans and their close relatives.

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    Homo erectus

    An extinct human species that lived from about 1.9 million years ago.

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    Homo sapiens

    The species name for modern humans.

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    Pre-history

    The period of human history before the invention of writing.

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    Bi-pedal

    A term describing creatures that walk on two legs, like humans.

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    Population Growth Rate

    The percentage increase in a population over time, reflecting birth and death rates.

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    Fertility

    The actual reproductive performance of a population, usually measured by birth rates.

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    Mortality

    The incidence of death within a population, influencing population size.

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    Migration

    The movement of people from one location to another, affecting population dynamics.

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    Birth Rate (BR)

    The number of live births per 1,000 people in a given year, a key fertility measure.

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    Population Dynamics

    The study of how populations change in size and composition over time.

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    Ethiopia's Population Growth (1900-2007)

    Population grew from 11.8 million in 1900 to 73.9 million by 2007, with varying growth rates.

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    Components of Population Dynamics

    The main factors affecting population changes: fertility, mortality, and migration.

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    Study Notes

    Grade 7 Social Studies Textbook (Ethiopia)

    • This textbook is a property of the school. Students must take good care of it.

    • Here are some tips to maintain the book:

      • Cover the book with protective materials, such as plastic, old newspapers or magazines.
      • Keep the book in a clean, dry place.
      • Keep hands clean when handling the book.
      • Do not write on the cover or inside pages.
      • Use a bookmark, such as paper or cardboard, instead of writing on the pages.
      • Do not tear or cut out pictures or pages.
      • Repair any torn pages with paste or tape
      • Pack the book carefully when putting it in a school bag.
      • Handle the book with care when passing it to someone else, and lay the book flat when reading it.
    • The authors of the textbook are: Abebe Yibeltie Yayehyirad (MA), Dessalew Awaye Derese (BA), Mulugeta Dires Fetene (MA), and Tegegn Degelo Someno (MA).

    • The editors, reviewers, and evaluators of the textbook are: Solomon Wondimu Metaferia (MA), Belay Belete Birhanu (MA), and Getachew Talema Atinafu.

    • The textbook was developed and published in 2022 in Addis Ababa, Ethiopia.

    • The textbook covers a variety of topics in Social Studies for Grade 7, including:

      • Physical characteristics of the Earth
      • Human evolution and world population
      • Human and natural resources
      • Ancient civilizations and medieval history of the world
      • Ancient history of Africa
      • Contemporary global issues.

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    Test your knowledge of constellations and planets with this engaging quiz. Discover the Latin names of constellations and learn about the celestial bodies in our solar system. Challenge yourself with questions about the Earth's structure and the characteristics of planets.

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