Our Home: Earth, A Unique Life Sustaining Planet Class 8 MCQ Questions Science Chapter 13

These Class 8 Science MCQ and Class 8 Science Chapter 13 Our Home: Earth, A Unique Life Sustaining Planet MCQ Questions Online Test with Answers focus on both theory and practical applications.

Class 8 Our Home: Earth, A Unique Life Sustaining Planet MCQ with Answers

MCQ on Our Home: Earth, A Unique Life Sustaining Planet Class 8

Class 8 Science Chapter 13 Our Home: Earth, A Unique Life Sustaining Planet MCQ Questions with Answers

Question 1.
What makes Earth’s position in the solar system ideal for supporting life?
(a) It is the closest planet to the Sun.
(b) It lies in the habitable zone, allowing liquid water.
(c) It has the strongest magnetic field in the solar system.
(d) It has no atmosphere.
Answer:
(b) It lies in the habitable zone, allowing liquid water.

Question 2.
Why is Venus the hottest planet in the solar system?
(a) It is closest to the Sun.
(b) It has a thick atmosphere, causing a strong greenhouse effect.
(c) It has no magnetic field.
(d) It has liquid water on its surface.
Answer:
(b) It has a thick atmosphere, causing a strong greenhouse effect.

Question 3.
Which feature of Earth protects it from harmful cosmic rays and solar wind?
(a) Ozone layer
(b) Liquid water
(c) Magnetic field
(d) Geosphere
Answer:
(c) Magnetic field

Question 4.
In sexual reproduction, why are offspring different from their parents?
(a) They grow in different climates.
(b) They receive mixed genes from both parents.
(c) They eat different food.
(d) They acquire new traits after birth.
Answer:
(b) They receive mixed genes from both parents.

Question 5.
What is a major cause of the triple planetary crisis?
(a) Earth’s circular orbit
(b) Burning fossil fuels
(c) Vegetative propagation
(d) Presence of ozone
Answer:
(b) Burning fossil fuels

Our Home: Earth, A Unique Life Sustaining Planet Class 8 Assertion and Reason Questions

Two statements are given – Assertion (A) and Reason (R). Please read them carefully and choose the correct option.

Question 1.
Assertion (A): Earth is the only planet in the solar system known to support life.
Reason (R): Earth’s position in the habitable zone allows liquid water to exist, essential for life.
Codes:
(a) Both (A) and (R) are true, and (R) is the correct explanation of (A).
(b) Both (A) and (R) are true, but (R) is not the correct explanation of (A).
(c) (A) is true, but (R) is false.
(d) (A) is false, but (R) is true.
Answer:
(a) Both (A) and (R) are true, and (R) is the correct explanation of (A).

Question 2.
Assertion (A): Sexual reproduction leads to variation in offspring.
Reason (R): Gametes from two parents combine to form a zygote with mixed genetic material.
Codes:
(a) Both (A) and (R) are true, and (R) is the correct explanation of (A).
(b) Both (A) and (R) are true, but (R) is not the correct explanation of (A).
(c) (A) is true, but (R) is false.
(d) (A) is false, but (R) is true.
Answer:
(a) Both (A) and (R) are true, and (R) is the correct explanation of (A).

Our Home: Earth, A Unique Life Sustaining Planet Class 8 Fill in the blanks

Question 1.
Earth’s ________________ covers about 70% of its surface, making it appear blue from space.
Answer:
Hydrosphere

Question 2.
The ________________ zone is the range of distances from the Sun where liquid water can exist.
Answer:
Habitable

Question 3.
The ________________ layer in the atmosphere protects life by blocking harmful ultraviolet rays.
Answer:
Ozone

Question 4.
In plants, ________________ is the process where pollen is transferred to enable fertilization.
Answer:
Pollination

Question 5.
________________ reproduction produce offspring that are exact copies of a single parent.
Answer:
Asexual

Our Home: Earth, A Unique Life Sustaining Planet Class 8 True or False

Question 1.
Earth’s gravity is too weak to hold its atmosphere, causing gases to escape into space.
Answer:
False

Question 2.
The greenhouse effect helps maintain Earth’s temperature suitable for life.
Answer:
True

Question 3.
All planets in the solar system have a thick atmosphere like Earth.
Answer:
False

Question 4.
Vegetative propagation is an example of sexual reproduction in plants.
Answer:
False

Question 5.
Climate change is caused by human activities like burning fossil fuels.
Answer:
True

Our Home: Earth, A Unique Life Sustaining Planet Class 8 Match the following

Question 1.

Answer:

Question 2.

Answer:

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