CBSE Class 7 - Science - CH4 - Heat (MCQs)

Heat & Temperature

credits:wpclipart

MCQs

Q1: When matter gets warmer, the atoms and molecules in that matter __________________

(a) stand still
(b) move faster
(c) move slower
(d) can't say


Q2: Higher the temperature of the body _____ is the kinetic energy of the molecules of that body?

(a) higher
(b) lower
(c) same
(d) none of these


Q3(NCERT): Stainless steel pans are usually provided with copper bottoms. The reason for this could be that

(a) copper bottom makes the pan more durable.
(b) such pans appear colourful.
(c) copper is a better conductor of heat than the stainless steel.
(d) copper is easier to clean than the stainless steel.


Q4: Unit of heat energy is
(a) kilogram
(b) metre
(c) joule
(d) degree

CBSE Class 7 - Science - CH2: Nutrition in Animals (MCQs)

Nutrition in Animals

Human Digestive System

MCQs

Q1: The pointed teeth in the buccal cavity are called:

(a) incisors
(b) canines
(c) premolars 
(d) molars


Q2: Bile juice is stored in 

(a) liver
(b) pancreas
(c) gall bladder 
(d) stomach


Q3: The inner walls of the small intestine have millions of small finger like projections called

(a) villi
(b) trachae
(c) appendix
(d) oesophagus

CBSE Class 7 - Science - Ch1 - Nutrition in Plants (MCQs)

Nutrition in Plants

image credits: classroomclaipart

(MCQs)

Q1: Green plants are:
(a) herbivores
(b) autotrophs
(c) hetrotrophs
(d) omnivores

Q2: The tiny pores present in the leaves of the plants for exchange of gases are called _____

(a) Stomata
(b) Tracheae
(c) Chloroplast
(d) Spiracles


Q3: Rhizobium is an example of

(a) Symbiosis
(b) Parasites
(c) Insectivorous
(d) none of these

CBSE Class 7 - Science - Ch 17 - Forests: Our Lifeline

Forests: Our Lifeline

NCERT Chapter Solution

Q1: Explain how animals dwelling in the forest help it grow and regenerate.

Answer: Various types of animals (herbivores, carnivores, omnivores) live in forests and contribute to food chain. Following animal activities show how animals help forest grow and regenerate.

1. Animals help in dispersal of seeds and pollination of flowers.
2. Animals excreta and their dead bodies when mixed win soil act as manure for the plants.
3. Micro organisms convert dead plants and leaves into humus which is rich in nutrients. Humus in soil provide necessary minerals for plant growth.

Q2:  Explain how forests prevent floods.

CBSE Class 7 - Science - Reproduction in Plants

Reproduction in Plants

Concept Map on Reproduction of Plants
Flower image credits: wpclipart

NCERT Chapter Solution, Q & A

Q1:  Fill in the blanks

Answer:
(a) Production of new individuals from the vegetative part of parent is called_vegetative propagation_.

(b) A flower may have either male or female reproductive parts. Such a flower is called_unisexual flower_.

(c) The transfer of pollen grains from the anther to the stigma of the same or of another flower of the same kind is known as _pollination__.

(d) The fusion of male and female gametes is termed as _fertilization___.

(e) Seed dispersal takes place by means of _wind__, __water_ and _animals_.

(f)  Asexual reproduction in spirogyra is an example of _fragmentation__.

(g) Mosses, Ferns, Moulds etc. reproduce by _spores___ formation.

CBSE Class 7 - Science - CH8 - Winds, Storms and Cyclones

Winds, Storms and Cyclones

Cyclone Hit at Samoa Islands
credits: NOAA

NCERT Solutions, Q & A

Q1: Fill the missing word in the blank spaces in the following statements:

(a) Wind is _________ air.
(b) Winds are generated due to ________ heating on the earth.
(c) Near the earth’s surface __________air rises up whereas ___________ air comes down.
(d) Air moves from a region of _________ pressure to a region of ___________ pressure.
(e) Air around us exerts __________ in all directions.
(f) Winds carrying ______________ bring rain.
(g) Air _________ on heating while ________ on cooling.
(h) A cyclone is called a __________ in the American continents and __________ in Japan and Philippines.
(i) The word monsoon is derived from the Arabic word _________, which means ‘season’.

Answer:
(a) moving
(b) uneven
(c) warm, cooler

CBSE Class 7 - Science - CH11 - Transportation in Animals and Plants

Transportation in Animals and Plants

Human Heart
(credits:wpclipart)

NCERT Solution, Q & A

Q1(NCERT): Fill in the blanks.

i.     The blood from the heart is transported to all parts of the body by the ___________________.

ii.    Haemoglobin is present in ______________ cells.

iii.   Arteries and veins are joined by a network of ______________.

iv.   The rhythmic expansion and contraction of the heart is called _________________.

v.    The main excretory product in human beings is _____________.

vi.   Sweat contains water and _______________.

vii.  Kidneys eliminate the waste materials in the liquid form called _______________.

viii. Water reaches great heights in the trees because of suction pull caused by _____________.


Answer:

CBSE Class 7 - Science - CH16 - Water: A Precious Resource

Water: A Precious Resource

Save Water
credits:openclipart

NCERT Solutions, Q & A

Q1: When 'World Water Day' is celebrated?

Answer: March 22nd.

Q2: What is the main objective of celebrating 'Water Day'?

Answer: We celebrate water day every year to attract the attention of everybody towards the
importance of conserving water.

Q3: How much much amount of water is recommended by UN for daily use by a person?

CBSE Class 7 - Science - CH 7 - Weather, Climate and Adaptations of Animals to Climate

Weather, Climate and Adaptations of Animals to Climate

Weather Applet on
your smartphone.
Can you identify weather icons?

NCERT Solution, Q & A, MCQ

Q1(NCERT): Name the elements that determine the weather of a place.

Answer: Following are the important elements that determine weather of a place:

• Temperature
• Air pressure
• Humidity
• Rainfall
• Wind Speed

Science (Quiz) for CTET, Class 6, 7 and 8

Science (Quiz) 

For CTET (Env. Studies Paper-1), Class 6, 7, 8 and NTSE

Q1: Which of the following is an energy giving food?

(a) Bread

(b) Pulses

(c) Fish

(d) Green Vegetables

CBSE Class 7 - Science - CH9 - Soil (#class7Science)(#eduvictors)

SOIL

NCERT Solutions, MCQs, Q&A

Q1(MCQ): In addition to the rock particles, the soil contains

(a) air and water
(b) water and plants
(c) minerals, organic matter, air and water
(d) water, air and plants

Answer: (c) minerals, organic matter, air and water

Q2(MCQ): The water holding capacity is the highest in

(a) Sandy soil
(b) clayey soil
(c) loamy soil
(d) a mixture of sand and loam

CBSE Class 7 - Science - CH13 - Motion and Time

Motion and Time

MCQs, NCERT Chapter Solution, Q & A

Q1(MCQ/NCERT): The basic unit of speed is:
(a) km/min
(b) m/min
(c) km/h
(d) m/s

Answer: (d) m/s

Class 7 - Science - CH18 - Wastewater Story

Wastewater Story

Potable Water is Precious
(credits: openclipart)

(NCERT Chapter Solutions and Other Q & A)

Q1: Fill in the blanks:

Answer:

(a) Cleaning of water is a process of removing _pollutants_.

(b) Wastewater released by houses is called _sewage_.

(c) Dried _sludge__ is used as manure.

(d) Drains get blocked by _cooking oil__ and _fats__.

(e) Wastewater is treated in a sewage treatment plant.

(f) Septic tanks, chemical toilets, composting pits are the examples of low-cost sewage disposal systems.

CBSE Class 7 Science - CH10 - Respiration in Organisms (#eduvictors)(#class7Science)

Respiration in Organisms

NCERT Chapter Solutions and other Q & A

Q1: How breathing is different from respiration?

Answer:

S.No.	Breathing	Respiration
1	It involves the intake of oxygen and release of Carbon dioxide.	Respiration is more complex and it includes breathing as well as oxidation of food in cells to release energy.
2	It is a physical process i.e. exchange of gases.	It is a biochemical process in which food is broken along with the release of energy.
3	It involves breathing organs e.g. lungs in mammals.	It occurs at a cellular level

CBSE Class 7 Science - CH14 - Electric Current and its Effects

Electric Current and its Effects

Why CFL is better than electric bulb?

NCERT Solutions and other Q & A

Q1: Draw in your notebook the symbols to represent the following components of electrical circuits: connecting wires, switch in the ‘OFF’ position, bulb, cell, switch in the ‘ON’ position, and battery.

Answer:

CBSE Class 7 Science - CH5 - Acids, Bases and Salts

NCERT Chapter Solutions & other Q & A

pH value is used
to indicate acidic, basic or
neutral nature of a
substance.
credits: wikicommons

Q1: State differences between acids and bases.

Answer:

SNo.	Properties	Acids	Bases
1.	Taste	Sour Taste	Bitter Taste
2.	Litmus Test	Turn blue litmus into red.	Turn red litmus into blue
3.	Dissolved in water	Give H+ ions (responsible for its acidic nature)	Give OH- ions (responsible for its basic nature)
4.	Action with metals	Give Hydrogen Gas	Generally do not react.
5.	Action with Ammonium Salt	Do not react	Give ammonia gas
6.	Action with phenolphthalein	Do not give any colour.	Give pink colour
7.	Action with methyl orange	Give red colour.	Give yellow colour.
8.	Absorb Carbon dioxide	Do not absorb CO2 gas.	Some bases like NaOH absorb CO2 gas.
9.	Naturally Found	Vinegar, Curd, Citrus fruits, HCl etc.	Lime Water, Soap, Milk of Magnesia etc.

Class 7 - Science - CH4 - Heat

NCERT Solution and Q & A

Q1: Define Heat.

Answer: Heat is a form of energy which produces a sensation of hotness or coldness. It is measured in Joules (J) or in Calories. Heat energy flows from one body to another due to temperature difference between the two. Heat is an internal energy of the substance due to molecular motion of the substance.

Class 7 - Science - CH3 - Fibre To Fabric

NCERT Chapter Solutions and Q & A

Sources of Wool
(image credits: openclipart.org)

Q1: 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?

class 7 - Science - Ch6 - Physical and Chemical Changes

NCERT Solutions and other Q & A

Melting of Ice Cream (Physical Change)
(Source: openclipart.org)

Q1: What do you mean by physical properties of matter?

Answer: A physical property can be measured and observed without changing the composition or identity of a substance. E.g. Odour, colour, volume, state (gas, liquid, or solid), density, melting point, and boiling point are physical properties of a substance.

Q2: What do you mean by physical changes?

Answer: Physical changes are changes in the physical properties of substances. No new substances are formed in these changes. These changes may be reversible. E.g. melting of ice.

Class 7 - Science - Ch2 - Nutrition in Animals

NCERT Text book Solutions and other Questions and Answers

Q1: Fill in the blanks:
Answer: 
(a) The main steps of digestion in humans are ingestion, digestion, absorption , assimilation and egestion.

(b) The largest gland in the human body is liver.

(c) The stomach releases hydrochloric acid and digestive juices which act on food.

(d) The inner wall of the small intestine has many finger-like outgrowths called villi.

(e) Amoeba digests its food in the food vacuole .

Q2: Mark ‘T’ if the statement is true and ‘F’ if it is false:
Answer:
(a) Digestion of starch starts in the stomach. (T/F) : False. It starts in the mouth
(b) The tongue helps in mixing food with saliva. (T/F) : True
(c) The gall bladder temporarily stores bile. (T/F) : True
(d) The ruminants bring back swallowed grass into their mouth and chew it for some time. (T/F) : True

Q3: Tick (√) mark the correct answer in each of the following:
Answer:

(a) Fat is completely digested in the(i) stomach
(ii) mouth
(iii) small intestine  (√)
(iv) large intestine

(b) Water from the undigested food is absorbed mainly in the
(i) stomach
(ii) foodpipe
(iii) small intestine
(iv) large intestine (√)

Q4: Match the items of Column I with those given in Column II:
Answer:
Carbohydrates - Sugar
Proteins           - Amino acids
Fats                 - Fatty acids and glycerol