Class 7 Science | Curiosity| Chapter 2: Exploring Substances: Acidic, Basic, and Neutral| NCERT Solutions #eduvictors

Class 7 Science | Curiosity| Chapter 2: Exploring Substances: Acidic, Basic, and Neutral| NCERT Solutions

Q1. A solution turns the red litmus paper blue. Excess addition of which of the following solutions would reverse the change?

(i) Lime water

(ii) Baking soda

(iii) Vinegar

(iv) Common salt solution

Answer: (iii) Vinegar

Only vinegar (acetic acid) is acidic and can neutralise the base, turning the blue litmus back to red.

CBSE Class 7 - Science - Soil (Worksheet)(#eduvictors)(#class7Science)

CBSE Class 7 - Science - Soil (Worksheet)

Image Credits: Tomáš Kebert & umimeto.org (wikimedia)

Fill in the blanks with suitable words.

1. Soil is formed by the breaking down of rocks, by the action of wind, water and climate, called __________.

2. The removal of land surface by water, wind or ice is known as ________.

3. ________ soil having organic matter and a good capacity to retain water are ideal sources for growing paddy.

Class 7 Science: Chapter Heat - Important Points To Remember (#class7Science)(#cbse2021)(#eduvictors)

 Class 7 Science: Chapter Heat - Important Points To Remember

① Heat is a form of energy. We use this energy to generate electricity, among other things.

② The hotness or coldness of a body is relative.

③ The temperature of a body is a measure of the degree of hotness of the body. We measure it by comparing it with a universal standard.

④ The Celsius and Fahrenheit scales are commonly used to measure temperature. Ice melts at 0°C or 32°F. and water boils at 100°C or 212°F.

Class 7 Science Annual Question Paper 2020-21(#class7Science)(#eduvictors)

Class 7 Science Annual Question Paper 2020-21

Learning is a continual process. To improve scores, the best way is to learn and practice. Solving question papers help students to evaluate their knowledge and familiarise with different types of question patterns being asked in the examination. 

Eduvictors provides CBSE Previous Year Papers and Sample Question Papers for Class 7 Maths, Science, Social, English, Hindi and Sanskrit with/without solutions to help students in their board exam preparation.

1. Oswaal NCERT & CBSE Question Bank Class 7 Social Science Book 

2. Science Practice-cum-Workbook Class 7

3. Olympiad Prep-Guide Science Class - 7

Here attached Annual Examination Question Paper:

CBSE Class 7 - Science - Transportation in Animals and Plants (Worksheet)(#class7Science)(#eduvictors)

 CBSE Class 7 - Science - Transportation in Animals and Plants (Worksheet)

Directions: Fill in the blanks with suitable word(s) in the following statements.

1. The fluid part of the blood is called _________.

2. Red pigment of RBC is _____________.

3.  _____________ fight against germ cells.

CBSE Class 7 Science - Chapter 18: Wastewater Story - Worksheet (#class7Science)(#eduvictors)

CBSE Class 7 Science - Chapter 18: Wastewater Story - Worksheet

Fill in the blanks with suitable words.

1. __________ is celebrated as World Water Day.

2. Drinking water is also called _________ water.

3. Contaminated water causes many water borne diseases such as _____________.

Respiration (Worksheet) - CBSE Class 7 - Science (#class7Science)(#eduvictors)(#biologyforkids)

Respiration (Worksheet) - CBSE Class 7 - Science

Directions: Fill in the blanks with suitable words

1. Food has ____________ which is released during respiration.

2.  The process of breakdown of food in the cell with the release of energy is called _______________.

3.  When breakdown of glucose occurs with the help of oxygen, it is called ____________.

CBSE Class 7 - Science - Fibre to Fabric - Worksheet (#cbsenotes)(#eduvictors)(#NCERTClass7Science)

Class 7 - Science - Fibre to Fabric - Worksheet

Fill in the blanks with suitable words

1. _________ and _________ fibres are obtained from animals.

2. The famous Pashmina shawls come from the soft under-fur of the ________ goat.

3. Silk fibres come from _________ of silk _________.

4. Liama and Alpaca also yield_____________ and are found in_____________.

CBSE Class 7 - Science - Chapter: Heat (Worksheet) (#eduvictors)(#class7Science)

CBSE Class 7 - Science - Chapter: Heat (Worksheet)

Fill in the blanks with suitable words:

1. Heat is a form of __________.

2. When an iron rod is placed on a flame, the end touching the flame starts heating first. Slowly, this heat travels to the other end. This process of transfer of heat is called ________.

3. The heat transfer continues till both the bodies attain the ________ temperature.

4. Heat causes expansion. ___________ expand the least. ________ expand the most.

CBSE Class 7 - Science - CH 7 - Weather, Climate and Adaptations of Animals to Climate (Q and A - Part 2)(#eduvictors)(#cbse2020)(#class7Science)

Weather, Climate and Adaptations of Animals to Climate (Q and A - Part 2)

 CBSE/ NCERT Class 7 - Science

Adaptations of Animals To Climate

👉Note: Here are questions and answers related to adaptations in animals to climate. You may check Q & A Part-1 for NCERT solutions and other topics.   

Q1: Define adaptations in living organisms?

Answer: The characteristic features that enable a specific organism to live in a particular habitat are called adaptations. Adaptations can be physical or behavioural.

Q2: Name the categories in which climate is divided based on habitat.

Answer: Three types of climates:

1. Hot and Dry Climate - Desert

2. Hot and Humid Climate - Tropical Rainforest

3. Extremely Cold Climate - Polar region

Q3: List three salient features of Hot and Dry Climate.

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

Physical & Chemical Changes (Worksheet)

CBSE Class 7 - Science   

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.

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.

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

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 __________.

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

Chapter 1:  Nutrition in Plants (Worksheet)

CBSE Class 7 - Science

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 ______________________.

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

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

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.

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

Amazing Human Body - Quick Facts 

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.

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

Science - Chapter 17 - Forests
- Our Lifeline 

(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 ________.

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

Class 7 - Science 

Chapter 8 - Winds, Storms and Cyclones

Worksheet

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.

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

Scientific Discoveries and Inventions Quiz

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

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

General Science Quiz 

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