Class 4  >  Science for Class 4  >  Test: Our Environment- 1 Download as PDF

Test: Our Environment- 1


Test Description

10 Questions MCQ Test Science for Class 4 | Test: Our Environment- 1

Test: Our Environment- 1 for Class 4 2022 is part of Science for Class 4 preparation. The Test: Our Environment- 1 questions and answers have been prepared according to the Class 4 exam syllabus.The Test: Our Environment- 1 MCQs are made for Class 4 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Our Environment- 1 below.
Solutions of Test: Our Environment- 1 questions in English are available as part of our Science for Class 4 for Class 4 & Test: Our Environment- 1 solutions in Hindi for Science for Class 4 course. Download more important topics, notes, lectures and mock test series for Class 4 Exam by signing up for free. Attempt Test: Our Environment- 1 | 10 questions in 15 minutes | Mock test for Class 4 preparation | Free important questions MCQ to study Science for Class 4 for Class 4 Exam | Download free PDF with solutions
1 Crore+ students have signed up on EduRev. Have you?
Test: Our Environment- 1 - Question 1

What is Sewage?

Detailed Solution for Test: Our Environment- 1 - Question 1

Sewage is a liquid waste which has water as its largest component along with various types of impurities like wastewater from houses is called sewage.

Physical Characteristics of Sewage (Waste Water) | Characteristics of Fresh  Sewage | Temperature, Color, Odor, Solids

Test: Our Environment- 1 - Question 2

The process of gradual increase in the earth's temperature is called_______.

Detailed Solution for Test: Our Environment- 1 - Question 2

Global Warming is the gradual increase in the overall temperature of the Earth's atmosphere. It begins with a phenomenon called the greenhouse effect.

Test: Our Environment- 1 - Question 3

The Solid part of the Earth comprising rocks forms the

Detailed Solution for Test: Our Environment- 1 - Question 3

The outermost layer, called the crust, is solid, too. Together, these solid parts are called the lithosphere. Earth's crust is made up of hard rocks. It is the only part of the Earth that humans see

lithosphere | National Geographic Society

Test: Our Environment- 1 - Question 4

The cutting down of trees on a large scale is called

Detailed Solution for Test: Our Environment- 1 - Question 4

Cutting down trees on a large scale is called deforestation, which is done majorly for commercial purposes such as to start big industries by clearing the land.

What is large-scale cutting down of trees called?

Test: Our Environment- 1 - Question 5

Non-biodegradable waste is one of the major cause of land pollution. Which one of the following is a better option to get rid of non- biodegradable waste?

Detailed Solution for Test: Our Environment- 1 - Question 5

In this case burning, burying and dumping will not work, as burning will cause air pollution, burying and dumping will cause land pollution. Recycling is an option which best to prevent pollution or causing any harm to environment.

Recycling as a Sustainable practice - MyGov Blogs

Test: Our Environment- 1 - Question 6

The most important reason for ozone layer depletion is the production and emission of _________ which is used in refrigerator and air conditioners.

Detailed Solution for Test: Our Environment- 1 - Question 6

A large fraction of the emitted ODSs reach the stratosphere, where they are converted to reactive gases containing chlorine and bromine that lead to ozone depletion. ODSs containing only carbon, chlorine, and fluorine are called chlorofluorocarbons, usually abbreviated as CFCs.

Test: Our Environment- 1 - Question 7

Forests are called as the 'lungs of nature" why?

Detailed Solution for Test: Our Environment- 1 - Question 7

The plant helps to provide oxygen for animal respiration. they also maintain the balance of carbondioxide in the atmosphere. that is why forest is called 'lungs of nature'.

Why are forests called lungs of the earth? - Quora

Test: Our Environment- 1 - Question 8

The whole mass of air surrounding the Earth is called

Detailed Solution for Test: Our Environment- 1 - Question 8

The mass of air surrounding the earth is known as atmosphere

The Earth's atmosphere is a layer of gases surrounding the planet Earth and  retained by the Earth's gravity. It contains nitroge

Test: Our Environment- 1 - Question 9

Contamination unwanted substances into water is called _____.

Detailed Solution for Test: Our Environment- 1 - Question 9

Contamination unwanted substances into water is called water pollution. 

Water and Air Pollution - HISTORY

Test: Our Environment- 1 - Question 10

The _________ is the only planet in our Solar System known to have life.

Detailed Solution for Test: Our Environment- 1 - Question 10

Earth—our home planet—is the only place we know of so far that's inhabited by living things. It's also the only planet in our solar system with liquid water on the surface.

Earth: Facts About Our Planet | Live Science

43 videos|37 docs|27 tests
Use Code STAYHOME200 and get INR 200 additional OFF
Use Coupon Code
Information about Test: Our Environment- 1 Page
In this test you can find the Exam questions for Test: Our Environment- 1 solved & explained in the simplest way possible. Besides giving Questions and answers for Test: Our Environment- 1, EduRev gives you an ample number of Online tests for practice