Chhattisgarh State Class 6 Science Chapter 1 solution / Textbook Exercise
Chhattisgarh State Board Class 6 Science Chapter 1 solution / exercise, which includes fill-in-the-blank sentences, true or false statements, and questions and answers.”
(1) Name the three layers of the earth.
(1) The three layers of the Earth are: Crust , Mantle , Core.
(2) Name the various minerals found in the earth’s crust.
(2) Various minerals found in the Earth’s crust include:
Iron , Aluminum , Copper , Coal , Limestone , Petroleum , Natural gases
(3) What is mantle?
(3) Mantle is the middle layer of the Earth. It is characterized by its thick layer of hot molten rock and contains various gases.
(4) Name the metals found in the core of the earth.
(4) The metals found in the core of the Earth are primarily iron and nickel. The outer region of the core contains mostly iron in a molten form.
Fill in the blanks.
1. The earth has been divided into three regions ———, ———and———. [Crust, Mantle, and Core.]
2. At the Poles water is in ——— form. [solid]
3. ——— part of the total area of the earth is Hydrosphere and ——— part is Lithosphere. [3/4 and 1/4 ]
4. Atmosphere has mainly——, ———and———gases. [Nitrogen,Oxygen and carbon dioxide]
5. ————gas turns lime water milky. [Carbon Dioxide]
Answer These
1. Which is the planet nearest to the sun?
The planet nearest to the sun is Mercury.
2. Which is the planet farthest from the sun?
The planet farthest from the sun is Neptune.
3. With respect to the distance from the sun, what is the position of the earth?
With respect to the distance from the sun, Earth is the third planet.
4. Which is the planet nearest to the earth?
The planet nearest to Earth is Venus.
5. Name the natural satellite of the earth.
The natural satellite of the Earth is the Moon.
6. Why do we eat food?
We eat food for several reasons:
To obtain the energy needed for our body’s functions and daily activities.
To provide essential nutrients such as vitamins, minerals, and proteins that are necessary for growth, repair, and overall health.
To maintain the body’s metabolic processes, including digestion, circulation, and respiration.
2. Why is water necessary for living beings?
Water is necessary for living beings for various reasons:
Water is a important component of cells, tissues, and organs in the body, facilitating essential biochemical reactions.
It helps regulate body temperature through processes like sweating and evaporation.
Water is crucial for digestion and the absorption of nutrients from food.
It aids in the removal of waste products from the body through urine and sweat.
Water also plays a role in maintaining blood pressure and overall bodily functions.
3. Where do aquatic organisms obtain O2 from?
Aquatic organisms obtain oxygen (O2) from dissolved oxygen in the water. In aquatic ecosystems, oxygen dissolves into water through a process called diffusion, and aquatic organisms extract oxygen directly from the water through their respiratory organs, such as gills in fish.
4. How does soil help green plants?
Soil helps green plants in various ways:
Soil provides physical support to plant roots, allowing them to anchor and stabilize the plant.
It serves as a reservoir for essential nutrients that plants need to grow, including minerals and organic matter.
Soil contains organic matter that decomposes and releases nutrients into a form that plants can absorb.
soil is essential for plant growth and the production of food and plays a critical role in ecosystems.
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.
