Choose the correct answer among the given options.
1. Minerals are found in abundance in
a. Atmosphere
b. Mantle
c. Crust [Ans]
d. Core
2. Gas necessary for respiration is
a. Nitrogen
b. Air
c. Oxygen [Ans]
d. Carbon Dioxide
3. Which of the following is not a planet
a. Venus
b. Mercury
c. Saturn
d. Moon [Ans]
4. In the solar system, the earth is located between which of the two planets?
a. Mars and Mercury
b. Venus and Mercury [Ans]
c. Mars and Venus
d. Mars and Jupiter
Fill in the blanks –
1. The Innermost portion of earth is known as……………………[core]
2. ……………… is the only planet of the solar system where life exists.[earth]
3. ……………… gas present in air is used by the living organisms for
breathing.[oxygen]
4. Green plants use……………gas for the manufacture of their food.[carbon dioxide]
5. INSAT is an ……………satellite of the earth.[artificial]
State whether the following statements are true or false. Make the false statement correct.
The Sun is a star (True)
Moon is the natural satellite of the earth. (True)
Air is soluble in water. (True)
The Sun revolves around the earth. (False) – Correction: The Earth revolves around the Sun.
In the core, solid iron and nickel metals are found. (True)
Match the following –
Satellite – Moon
Middle layer of earth – Mantle
Air taken during breathing – Oxygen
Nearest planet to sun – Mercury
Nearest planet to earth – Mars
Short answer questions.
1. What is the importance of the three layers of earth?
A. The three layers of the Earth (Crust, Mantle, and Core) are important because they have distinct properties and compositions that contribute to the Earth’s overall structure and function. The crust is where we find land, minerals, and essential resources. The mantle, with its molten rock, plays a role in the Earth’s internal heat and geological processes. The core, composed of iron and nickel, generates the Earth’s magnetic field.
2. What is the importance of oxygen for living beings?
A. Oxygen is important for living beings because it is essential for the process of respiration. Organisms, including humans, require oxygen to convert nutrients into energy through cellular respiration. Without oxygen, living beings cannot generate the energy needed for their metabolic processes.
3. Write the names of the members of the solar system according to their distance from the Sun.
A. Members of the solar system according to their distance from the Sun:
Mercury , Venus , Earth , Mars , Jupiter , Saturn , Uranus , Neptune.
4. Give the importance of artificial satellites.
A. Artificial satellites serve various important purposes, including:
Telecommunications,Weather Forecasting,Navigation ,Earth Observation, Scientific Research.
5. What are the basic requirements for sustaining life on earth?
A. The basic requirements for sustaining life on Earth include:
Food: Organisms obtain energy and nutrients from food.
Water: Water is essential for various bodily functions and is a universal solvent.
Air (Oxygen): Oxygen is required for respiration.
Temperature: A range of temperatures is needed to support life.
6. Why is the Earth called a unique planet?
A. Earth is called a unique planet because it possesses several characteristics that make it suitable for sustaining life, including:
The presence of water in liquid form, A diverse range of ecosystems and habitats , An atmosphere that contains oxygen, a critical element for respiration. Natural resources like minerals, metals, and fertile soil that support human civilization.
