CBSE > Class 07 > Science | CBSE Board | Homework Help

Symbiotic means there are two organisms who live together and are mutually beneficial. For eg: In lichens, the two partners, fungi and algae help each other to survive. Hope it helps.

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What life process

Posted by Manoj Gowda 4 years, 5 months ago

CBSE > Class 07 > Science

1 answers

Deepak Kumar 4 years, 5 months ago

life process are those process which take place to sustain life

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What is risevam

Posted by Manoj Gowda 4 years, 5 months ago

CBSE > Class 07 > Science

0 answers

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Draw and explain the formation of land breeze and sea breeze

Posted by Saloni Makhija 4 years, 5 months ago

CBSE > Class 07 > Science

1 answers

Preeti Dabral 4 years, 5 months ago

At sea-shore during the day cold air from the sea moves towards the beach because the land gets more heated than the sea water. Hot air above the land rises up, and cold air from the sea moves towards the land beach. This is called sea breeze as shown in Fig. (a).

During the night cold air from the land moves towards the sea because the land cools more quickly than the sea water. So hot air above the sea rises up and cold air from the land moves towards the sea. This is called land breeze as shown in Fig. (b).

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Which are not use for photosynthesis

Posted by Mohammed Nawfal 4 years, 5 months ago

CBSE > Class 07 > Science

5 answers

Praneet Pathak 4 years, 5 months ago

Human made things are not use for photosynthesis

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Harsh Pandey 4 years, 5 months ago

Oxeygen

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Harsh Pandey 4 years, 5 months ago

Yes I know that is

1Thank You

Kalai Mathi 4 years, 5 months ago

Oxygen

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Mohammed Nawfal 4 years, 5 months ago

Oxygen

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What is mixed motion

Posted by Satyam Yadav 4 years, 5 months ago

CBSE > Class 07 > Science

1 answers

Ravneet Kaur 4 years, 5 months ago

A body can have more than type of motion. Such a motion is called mixed motion. Example: The wheels of a moving train have both the translatory as well as the rotatory motions.

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What is sodium hydroxide

Posted by Gaurav Chauhan 4 years, 5 months ago

CBSE > Class 07 > Science

4 answers

Preeti Dabral 4 years, 5 months ago

A strongly alkaline white deliquescent compound used in many industrial processes, e.g. the manufacture of soap and paper.

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Anshika Shukla 4 years, 5 months ago

It is found in soap

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Sachin Kumar 4 years, 5 months ago

Sachin

1Thank You

Samriddha Kaushal 4 years, 5 months ago

It is a type of base .

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Write a note on chlorophyll

Posted by Kannan Jeswanth 4 years, 5 months ago

CBSE > Class 07 > Science

3 answers

Preeti Dabral 4 years, 5 months ago

Chlorophyll is the green pigment which are present in the chloroplast of the plant leaf. Chlorophyll helps in doing process of photosynthesis to prepare food of plant.

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Deepak Kumar 4 years, 5 months ago

chlorophyll is a green pigment preent in the leaves of the plant it absorbs the sunlight

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Ravneet Kaur 4 years, 5 months ago

A green pigment present in leaves that capture the energy from sunlight to prepare food from carbon dioxide and water by photosynthesis.

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How would you test the presence of starch leaves

Posted by Kannan Jeswanth 4 years, 5 months ago

CBSE > Class 07 > Science

3 answers

Preeti Dabral 4 years, 5 months ago

Iodine solution is used to test leaves for the presence of starch. You need to: heat a plant leaf in boiling water for 30 seconds (this stops its chemical reactions) heat it in boiling ethanol for a few minutes (this removes most of its colour)

1Thank You

Ravneet Kaur 4 years, 5 months ago

The presences of starch in leaves can be tested by Iodine that gives blue black colour with starch.

2Thank You

Riya Yadav 4 years, 5 months ago

1+make a iodine solution 2-put 2to 3 drops on leaves 3-if color of leaves changes black -blue It means it has starch?

2Thank You

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How does heat transfer in liquid takes place

Posted by Pratibha Verma 4 years, 5 months ago

CBSE > Class 07 > Science

3 answers

Nitya Shukla 4 years, 5 months ago

Convection

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Riya Yadav 4 years, 5 months ago

By convection

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Pratibha Verma 4 years, 5 months ago

Please answer

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What is taste of base

Posted by Riya Yadav 4 years, 5 months ago

CBSE > Class 07 > Science

5 answers

Lavkesh Yadav 4 years, 5 months ago

Bitter

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Keya .V. Gaudani 4 years, 5 months ago

Bitter

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Priyanshi 6232 4 years, 5 months ago

Bitter

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Somiya Sagar 4 years, 5 months ago

Bitter

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Sumit Bhagat 4 years, 5 months ago

Bitter

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What is taste of acid

Posted by Riya Yadav 4 years, 5 months ago

CBSE > Class 07 > Science

2 answers

Harsh Pandey 4 years, 5 months ago

Sour

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Sumit Bhagat 4 years, 5 months ago

Sour

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How we need wool

Posted by Bhawana Suyal 4 years, 5 months ago

CBSE > Class 07 > Science

1 answers

Mohammed Nawfal 4 years, 5 months ago

We wool sweater, woolen glowes, woolen dress, mufflers, socks, woolen thread this like we you use wool

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ANSWER

what is a ameba

Posted by Pavan Patel 4 years, 5 months ago

CBSE > Class 07 > Science

5 answers

Priyanshi 6232 4 years, 5 months ago

It is a microscopic single celled organisms found in pond .

0Thank You

Hiranya P 4 years, 5 months ago

Amoeba is a single celled microscopic organism

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Ravneet Kaur 4 years, 5 months ago

An amoeba, often called an amoeboid, is a type of cell or unicellular organism which has the ability to alter its shape, primarily by extending and retracting pseudopods. Amoebae do not form a single taxonomic group; instead, they are found in every major lineage of eukaryotic organisms.

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Riya Yadav 4 years, 5 months ago

Amoeba is a single cell micro-organism

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Riya Yadav 4 years, 5 months ago

Amoeba hoga not ameba

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Definition of digestion....

Posted by Priti _ 4 years, 5 months ago

CBSE > Class 07 > Science

2 answers

[email protected] Amar Kumar Mathur 4 years, 5 months ago

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Keshav Vashisht 4 years, 5 months ago

Hvegbfeoe

2Thank You

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What is the septs to make a silver egg

Posted by Kannan Jeswanth 4 years, 5 months ago

CBSE > Class 07 > Science

0 answers

ANSWER

Draw a table for weather report of 7 successive days of 5 cities Punjab in summer month and also write the reason and effects the increase in temperature day by day

Posted by Jashanpreet Singh Jashanpreet Singh 4 years, 5 months ago

CBSE > Class 07 > Science

0 answers

ANSWER

Draw a table

Posted by Jashanpreet Singh Jashanpreet Singh 4 years, 5 months ago

CBSE > Class 07 > Science

1 answers

Jashanpreet Singh Jashanpreet Singh 4 years, 5 months ago

Draw a table for weather report of 7

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Name 3 internal layer of air

Posted by Riya Yadav 4 years, 5 months ago

CBSE > Class 07 > Science

2 answers

Preeti Dabral 4 years, 5 months ago

These layers are the troposphere, stratosphere, mesosphere and thermosphere. A further region at about 500 km above the Earth's surface is called the exosphere.

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Ayush Raj Ssingh 4 years, 5 months ago

These layers are the troposphere, stratosphere, mesosphere and thermosphere. A further region at about 500 km above the Earth's surface is called the exosphere

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What is convection ?

Posted by Riya Yadav 4 years, 5 months ago

CBSE > Class 07 > Science

2 answers

Friends Time 4 years, 5 months ago

The transfer of heat in liquids and gases. In this process molecules in the matter moves to transfer heat.

2Thank You

Ojas And Anuj Deopure 4 years, 5 months ago

Pagal

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Write about pharynx and oesophagus

Posted by Gyan Prabhat Pandey 4 years, 5 months ago

CBSE > Class 07 > Science

3 answers

Braj Nandan 4 years, 5 months ago

Gullet

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Riya Yadav 4 years, 5 months ago

Is oesophagus is a muscular pipe(food pipe) which helps to reach our food to stomach

2Thank You

Anshuman Arya 4 years, 5 months ago

222

1Thank You

ANSWER

Please give fibre to fabric q/ans and matching

Posted by S.Kunal Maruti 4 years, 5 months ago

CBSE > Class 07 > Science

2 answers

Harsh Pandey 4 years, 5 months ago

So go to google and search class 7 ch 3 by aglasem and got ans and gis

1Thank You

Divya Rawat 4 years, 5 months ago

1. You must be familiar with the following nursery rhymes: (i) ‘Baa baa black sheep, have you any wool.’ (ii) ‘Mary had a little lamb, whose fleece was white as snow.’ Answer the following: (a) Which parts of the black sheep have wool? (b) What is meant by the white fleece of the lamb? Solution: a) Wool is obtained from hairy fibres of the sheep. b) White fleece of the lamb refers to the white colour of their fur. 2. The silkworm is (a) a caterpillar, (b) a larva. Choose the correct option. (i) a (ii) b (iii) both a and b (iv) neither a nor b. Solution: (iii) both a and b 3. Which of the following does not yield wool? (i) Yak (ii) Camel (iii) Goat (iv) Woolly dog Solution: The answer is (iv) Woolly dog 4.What is meant by the following terms? (i) Rearing (ii) Shearing (iii) Sericulture Solution: i) Raising of domestic animals like sheep, goat, yak, cow and buffaloes for commercial purposes such as for milk and fur is known as rearing. ii) Shearing is a process of removal of animal hair by using machines similar to those used by barbers. ii) Rearing of silkworms to get silk is known as Sericulture. 5. Given below is a sequence of steps in the processing of wool. Which are the missing steps? Add them. Shearing, __________, sorting, __________, __________, _________. Solution: Shearing, Scouring, sorting, picking of burrs, dying of fibres, making of yarn. 6. Make sketches of the two stages in the life history of the silk moth which are directly related to the production of silk. Solution: 7. Out of the following, which are the two terms related to silk production? Sericulture, floriculture, moriculture, apiculture and silviculture. Hints: (i) Silk production involves cultivation of mulberry leaves and rearing silkworms. (ii) Scientific name of mulberry is Morus alba Solution: Sericulture and moriculture 8. Match the words of Column I with those given in Column II: Column-IColumn-I1. Scouring(a) Yields silk fibres2. Mulberry leaves(b) Wool yielding animal3. Yak(c) Food of silkworm4. Cocoon(d) Reeling(e) Cleaning sheared skin Solution: Column-IColumn-I1. Scouring(e) Cleaning sheared skin2. Mulberry leaves(c) Food of silkworm3. Yak(b) Wool yielding animal4. Cocoon(a) Yields silk fibres 9. Given below is a crossword puzzle based on this lesson. Use hints to fill in the blank spaces with letters that complete the words. Down (D) 1 : Thorough washing 2 : Animal fibre 3 : Animal fibre Across (A) 1 : Keeps warm 2 : Its leaves are eaten by silkworms 3: Hatches from egg of moth Solution: Down: 1D. Scour 2D. Silk 3D. Fibre Across 1A. Wool 2A. Mulberry 3A. Caterpillar

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