Showing posts with label class7-science. Show all posts
Showing posts with label class7-science. Show all posts

Friday, 31 July 2020

CBSE Class 7 - Science - Physical & Chemical Changes (Worksheet)(#eduvictors)(#cbse2020)(#class7Science)

Physical & Chemical Changes (Worksheet)

CBSE Class 7 - Science   
CBSE Class 7 - Science - Physical & Chemical Changes (Worksheet)(#eduvictors)(#cbse2020)(#class7Science)

Fill in the blanks with suitable words:

1. In a ________ change, no new substance is formed.


2. Shape, size, colour and state are called __________ properties of a substance.


3. Rusting of iron occurs when iron gets in contact with moisture is an example of _______ change.


4. Change in the colour of the substance often indicates that it is a ________ change.

Tuesday, 28 July 2020

CBSE Class 7 - Science - Chapter 16: Water - A Precious Resource (Worksheet)(#eduvictors)(#class7Science)(#cbse2020)

Chapter 16: Water - A Precious Resource (Worksheet)

Class 7 - Science



Fill in the blanks with suitable words.


1. __________ is celebrated as the world water day.


2. _______ of the earth’s surface is covered with water.


3. _____ and _______ water is highly salty and hence unfit for drinking.


4. Most of the freshwater is frozen in the __________ and in the polar ice caps and is thus not readily available.

Tuesday, 14 July 2020

CBSE Class 7 Science Chapter 2 - Nutrition in Animals (Worksheet)(#eduvictors)(#Class7Science)

Class 7 Science Chapter 2 - Nutrition in Animals (Worksheet)

Worksheet based on NCERT Class 7 Science Chapter

CBSE Class 7 Science Chapter 2 - Nutrition in Animals (Worksheet)(#eduvictors)(#Class7Science)

Fill in the blanks with suitable word(s)


1. Food is entered into the _________ cavity through mouth is called ________.


2. The alimentary canal stretches from ____________  to ___________.


3. Food is digested inside the stomach with the help of _________ juice.


4. Teeth are rooted in separate _________ in between the __________.

Tuesday, 2 June 2020

Class 7 - Science - Chapter 1: Nutrition in Plants (Worksheet)(#eduvictors)(#cbse2020)(#class7Science)

Chapter 1:  Nutrition in Plants (Worksheet)

CBSE Class 7 - Science

Class 7 - Science - Chapter 1:  Nutrition in Plants (Worksheet)(#eduvictors)(#cbse2020)(#class7Science)


Fill in the Blanks

1. The components of food which are necessary for our body are called _______________.

2. The process of utilization of food by a living organism to obtain energy is called _____________.

3. Green plants synthesise their own food themselves by the process of __________________.

4. Green plants are _________ that is, they make their own food from simpler substances.

5. Organisms that are dependent on others for their nutrition are called ______________________.

Friday, 24 January 2020

CBSE Class 7 - Science - Acids, Bases and Salts (Worksheet) (#eduvictors)(#cbseClass7Science)

Acids, Bases and Salts (Worksheet)CBSE Class 7 - Science 

CBSE Class 7 - Science - Acids, Bases and Salts (Worksheet) (#eduvictors)(#cbseClass7Science)

Direction: Fill in the blanks in the following sentences.

1. _______ are substances having a sour taste.


2. Substances that are bitter in taste and soapy to touch are _______ in nature.


3. Chemicals that are used to check acidic or basic nature of substances are called __________.


4. Acids turn ______ litmus to _____ .


5. Turmeric paste and China rose are also _________ indicators. Turmeric paste remains yellow in acidic solutions but turns to ________ in basic solutions.

Monday, 29 April 2019

Amazing Human Body - Quick Facts (#humanbody)(#eduvictors)

Amazing Human Body - Quick Facts 

Amazing Human Body - Quick Facts (#humanbody)(#eduvictors)

1.  The hardest bone in the human body is the jawbone.

2.  The number of eye blinks varies greatly from about 29 blinks each minute if you are talking to someone to only 4 blinks each minute if you are reading.

3.  The average human blinks 25 times per minute.

4.  A nail takes around 6 months to grow from base to the tip.

5.  Each second 10,000,000 cells die and are replaced in your body.

Wednesday, 13 February 2019

CBSE Class 7 - Science - Chapter 17 - Forests - Our Lifeline (Worksheet)(#cbsenotes)(#eduvictors)

Science - Chapter 17 - Forests
- Our Lifeline 

CBSE Class 7 - Science - Chapter 17 - Forests - Our Lifeline (Worksheet)(#cbsenotes)(#eduvictors)

(Worksheet)

Fill in the blanks with suitable words:

1. _________ is the covering of large trees that serve as a roof to shelter an area or other plants in forests.


2. ________ is an ecosystem comprising various plants, animals and micro-organisms.


3. In a forest, the _______ form the top layer, which is followed by shrubs, and then _______, which form the lowermost layer of vegetation.


4. In the forest, there is an interaction between soil, _____, air and living organisms.


5. Forests protect the soil from ________.


Tuesday, 18 December 2018

CBSE Class 7 - Science - Chapter 8 - Winds, Storms and Cyclones (Worksheet)(#eduvictors)(#cbsenotes)

Class 7 - Science 

Chapter 8 - Winds, Storms and Cyclones

Worksheet

CBSE Class 7 - Science - Chapter 8 - Winds, Storms and Cyclones (Worksheet)(#eduvictors)(#cbsenotes)


Fill the missing word in the blank spaces in the following statements:

1. Wind is _________ air.


2. Winds are generated due to ________ heating on the earth.


3. Near the earth’s surface __________air rises up whereas ___________ air comes down.


4. Air moves from a region of _________ pressure to a region of ___________ pressure.

Wednesday, 5 December 2018

CBSE Class 6 - 10 - Scientific Discoveries and Inventions Quiz (#sciencequiz)(#eduvictors)

Scientific Discoveries and Inventions Quiz

CBSE Class 6 - 10 - Scientific Discoveries and Inventions Quiz (#sciencequiz)(#eduvictors)

Q1: Who discovered the first antibiotic?

(a) W Fleming
(b) C Waksman
(c) Louis Pasteur
(d) A Fleming


Q2: Who invented the Safety razor?

(a) Gillette
(b) Nikola Tesla
(c) Steve Job
(d) Lar Strauss


Q3: X–rays were discovered by

(a) Edison
(b) Roentgen
(c) Marie Curie
(d) Van Lue


Monday, 16 July 2018

Class 6/7/8/9/10 Entrance Tests/NTSE/CTET/NDA - General Science Quiz (2018) (#eduvictors)

General Science Quiz 

Class 6/7/8/9/10 Entrance Tests/NTSE/CTET/NDA - General Science Quiz (2018) (#eduvictors)

Q1: Which of the following is not example bio-mass energy source?

(a) Wood
(b) Gobar gas
(c) Atomic energy
(d) Coal


Q2: The scientific study of earthquakes is known as 

(a) Seismology
(b) Cosmology
(c) Ecology
(d) Pathology


Q3: Which of the following is a plant hormone?

(a) Insulin
(b) Thyroxin
(c) Estrogen
(d) Cytokinin


Sunday, 1 April 2018

Class 7/8/10 - Forests Our Life Line or Natural Resources - Importance of Forest Resources (#cbsenotes)(#eduvictors)

Natural Resources - Importance of Forest Resources

Class 7/8/10 - Forests Our Life Line or Natural Resources - Importance of Forest Resources (#cbsenotes)(#eduvictors)

The importance of forest resources can be described  as follows:

1. Ecological Balance
2. Renewable Natural Resources
3. Eco-system
4. Economic Development
5. Environment Quality
6. Safeguard against Pollution
7. Soil Conservation
8. Wind and Soil Erosion
9. Check the Extension Balance
10. Maintains Ecological Balance
11. Attracts Rainfall
12. Control Floods
13. Connects to our Cultural and Civilization
14. Supply of Raw Material


1. Ecological Balance: 

Forests and wildlife are essential to maintain ecological balance of an area.


Friday, 22 December 2017

Class 7/8/9/10 - Science - Clean Air: From Donora to Delhi - Can we breathe safely? (#eduvictors)(#cbse-notes)

Clean Air: From Donora to Delhi -
Can we breathe safely?

Class 7/8/9/10 - Science - Clean Air: From Donora to Delhi - Can we breathe safely? (#eduvictors)(#cbse-notes)

With the industrial revolution, the human mankind experienced the air pollution for the first time and realized it as a potential threat to human life. The black smoke of locomotives, factories from the industrial towns of England blackened its cities.

In 1950s, the smoke of industrialized Pennsylvania valley in USA made the air murkier. In the small town of Donora, population 14,000, residents suffered eye, nose, and throat irritation and breathing difficulties resulting in 20 deaths.

In 2008, on the 60th anniversary of the event, the town opened the Donora Smog Museum with the
slogan "Clean Air Starts Here".

Monday, 15 May 2017

CBSE Class 7 Science - CH1 Nutrition In Plants - Questions and Answers (#cbsenotes)

Nutrition In Plants 

Questions and Answers
Class 7 Science

CBSE Class 7 Science - CH1 Nutrition In Plants - Questions and Answers (#cbsenotes)

Q1: Define Nutrition.

Answer: The process of taking in food and its utilization by the body is called nutrition.


Q2: What are nutrients? Name the different nutrients.

Answer: Nutrients are chemical substances present in our food that provide energy and other materials required by the body to live and grow.

Examples of nutrients are:

Carbohydrates
Proteins
Fats
Minerals
Vitamins



Q3: Name the two modes of nutrition.

Answer:
Autotrophic
Heterotrophic


Saturday, 29 October 2016

Class 7 - Science - Weather, Climate and Adaptation of Animals to Climate (MCQs)

 Weather, Climate and
Adaptation of Animals to Climate 

Class 7 - Science - Weather, Climate and Adaptation of Animals to Climate (MCQs)
Protect Our Environment

Class 7 - Science - NCERT Exemlar MCQs Answers



Q1: The maximum and minimum temperature displayed daily in the weather bulletin refer to the –

(a) highest day temperature and lowest night temperature of the day.
(b) highest day temperature and highest night temperature of the month.
(c) temperature recorded at 12 noon and at mid night (00.00 hrs).
(d) average highest temperature of day and average lowest temperature of night.




Q2: Paheli went to a wildlife sanctuary where she saw dense vegetation of trees, shrubs, herbs and also a variety of animals like monkeys, birds, elephants, snakes, frogs, etc. The most likely location of this sanctuary is in the –

(a) temperate region
(b) tropical region
(c) polar region
(d) coastal region




Q3: Out of the given definitions, which is the most appropriate definition of climate?

(a) Changes in weather conditions in a year.
(b) Average weather pattern of many years.
(c) Change in weather pattern in a few years.
(d) Weather conditions during summer.



Q4: Which of the following briefly describes the desert climate?

(a) Hot and humid
(b) Dry and humid
(c) Hot and dry
(d) Hot and wet



Thursday, 3 March 2016

CBSE Class 7 - Science - CH17 - Forests: Our Lifeline (MCQs)

Forests: Our Lifeline


CBSE Class 7 - Science - CH17 - Forests: Our Lifeline (MCQs)
Can You Identify Trees by looking at these leaves?
(Answer given below)

MCQs


Q1: The covering of large trees that serve as a roof to shelter an area or other plants in forests is called ___________.

(a) Canopy
(b) Crown
(c) Carnival
(d) none of these



Q2: Green plants synthesize their food by the process of __________

(a) Respiration
(b) Photosynthesis
(c) Crown
(d) Reproduction



Q3: Green plants are also referred as _________

(a) Consumers
(b) Producers
(c) Decomposers
(d) Herbivores


Q4: Tigers, Lions, Leopards belong to which of the following group?

(a) Producers
(b) Herbivores
(c) Decomposers
(d) Carnivores

Tuesday, 16 February 2016

CBSE Class 7 - Science Quiz (2016)

SCIENCE QUIZ

CBSE Class 7 - Science Quiz (2016)

MCQs based NCERT Class 7 Science Chapters


Q1: The vessels which carry carbon dioxide rich blood from all parts of the body back to the heart are called 

(a) Veins
(b) Arteries
(c) Capillaries
(d) Valves



Q2: There are some chemicals secreted by an insect to attract attention of other members of species. These are called

(a) vitamins
(b) hormones
(c) fibronin
(d) pheromones



Q3: Which gas is produced when sludge is digested?

(a) Methane
(b) Ethane
(c) Propane
(d) Butane



Q4: What do we call the network of several food chains connecting each other?

(a) Food Web
(b) Food Chain
(c) Food Cycle
(d) Trophic Level



Q5: Nagma was playing basketball with her team mates. Just after the game her pulse rate will

(a) increase
(b) decrease
(c) remains same
(d) none of these

Wednesday, 30 December 2015

CBSE Class 7 - Science - CH16 - Water - A Precious Resource (MCQs)

Water - A Precious Resource

MCQs based on NCERT Chapter
CBSE Class 7 - Science - CH16 - Water - A Precious Resource (MCQs)
जल है तो कल है
image credits: openclipart


Q1: Tubewells and Springs are the examples of 

(a) surface water
(b) underground water
(c) potable water
(d) all of these


Q2: Which of the following will not help in conservation of water?

(a) drip irrigation
(b) planting more trees
(c) water treatment plant
(d) cutting trees to check water loss due to transpiration



Q3: Ground water accumulates between layers of hard rock. It is known as

(a) aquifer
(b) pond
(c) water table
(d) surface water



Q4: Which of the following is the reason for depletion of water table?

(a) Planting more trees
(b) Heavy Rainfall
(c) Industrialization
(d) Rainwater harvesting


Monday, 21 December 2015

CBSE Class 7 - Science - CH 8 - Wastewater Story (MCQs)

Wastewater Story 

Waster Water Treatment Workflow
Leonard G. at English Wikipedia
[CC BY-SA 2.5 (http://creativecommons.org/licenses/by-sa/2.5)],
via Wikimedia Commons

MCQs based on NCERT Chapter


Q1: The light materials which float during waste water treatment is

(a) sludge
(b) scum
(c) sewerage
(d) biogas



Q2: Which of the following is produced during waste water treatment?

(a) sludge
(b) biogas
(c) both biogas and sludge
(d) none of these



Q3: Contaminated water disease is

(a) gastroenteritis
(b) malaria
(c) flu
(d) none of these



Q4: Which of the following is a part of waste water treatment plant?

(a) clarifier
(b) aeration tank
(c) vertical bars
(d) all of these