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

Friday 19 June 2015

CBSE Class 7 Science CH10 Respiration In Organisms (MCQs)

Respiration In Organisms

Human Respiratory System
image credits: wikipedia

MCQs

Q1: Breathing is a ________ process while respiration is a _______ process.

(a) physical, chemical
(b) chemical, physical
(c) physical, physical
(d) chemical, chemical

Q2: Organisms which respire in absence of air are called _________. 

(a) microbes
(b) anaerobes
(c) aerobes
(d) none of these

Q3: Plants breathe through tiny pores in the leaves called ________.

(a) leaf blade
(b) trachea
(c) pores
(d) stomata

Q4: In earthworm, the exchange of gases occurs through ________.

(a) lungs
(b) gills
(c) moist skin
(d) tracheae

Q5: During Inspiration or Inhalation, inside lungs

Wednesday 17 June 2015

CBSE Class 7 Science CH 8 Winds, Storms and Cyclones (MCQs)

Winds, Storms and Cyclones 

(MCQs) 
CBSE Class 7 Science CH 8 Winds, Storms and Cyclones (MCQs)
Weather Symbols (Can you guess?)
image credits: openclipart


Q1: When wind speed increases, air pressures

(a) increases
(b) decreases
(c) remains constant
(d) none of these


Q2: What is the name given to the wind blowing from sea to land?

(a) Thunderstorm
(b) Land breeze
(c) Sea breeze
(d) cyclone


Q3: Which one of the following statement is INCORRECT?

(a) When air gets heated, it expands.
(b) when air gets cooled, it contracts.
(c) The warm air is heavier than cold air.
(d) Air moves from high pressure region to low pressure region.


Q4: The direction of airflow is also affected by Earth’s rotation. It is called ________.

(a) Coriolis Effect
(b) El nino Effect
(c) La Nina Effect
(d) Greenhouse Effect

Q5: An instrument used to study the speed of winds is called _________.

Sunday 14 June 2015

CBSE Class 7 Science CH12 Reproduction In Plants (MCQs)

Reproduction In Plants 

MCQs
Structure of Flower
Q1: Which one of the following is NOT a type of asexual reproduction?

(a) Budding
(b) Pollination
(c) Spores
(d) Fragmentation

Q2: Hydra produces by

(a) Fragmentation
(b) Budding
(c) Spores
(d) fusion of gametes

Q3: Which of the following is a male reproductive part of a flower?

(a) Stamen
(b) Pistil
(c) Stem
(d) Root

Q4: The small bulb-like projection coming out of yeast is known as ________.

(a) Fragment
(b) Spore
(c) Bud
(d) Seed

Q5: Which of the following is a male reproductive part of a flower?

Saturday 6 June 2015

CBSE Class 7 - Science - CH6 - Physical and Chemical Changes (MCQs)

Physical and Chemical Changes

MCQs
CBSE Class 7 - Science - CH6 - Physical and Chemical Changes (MCQs)
Is burning a match stick
physical change or chemical?


Q1: Which of the following is a physical change?

(a) Rusting of Iron
(b) Heating of Iron
(c) Burning of Wood
(d) Ripening of a fruit.

Q2: Which of the following is a chemical change?

(a) Boiling of Water
(b) Tearing of Newspaper
(c) Cooking a vegetable
(d) Freezing water into ice

Q3: Which of the following is NOT a physical property of a substance?

(a) shape
(b) color
(c) density
(d) flammability

Q4: Which of the following MIGHT NOT tell a chemical change has taken place?

(a) Evolution of gas.
(b) Light is generated
(c) Production of heat
(d) Converting liquid into gas.

Q5: Turning milk into curd is a

Friday 24 October 2014

CBSE Class 6-12 - Science - Fathers in Biology

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Fathers of Various Branches in Biology

Aristotle - Father of Biology
credits: wikipedia
Num.           Branch of Biology Name
1 Father of Biology Aristotle
2 Father of Zoology Aristotle
3 Father of Botany Theophrastus
4 Father of Taxonomy Carl Linnaeus
5 Father of Plant Physiology Stephen Hales
6 Father of Bacteriology Louis Pastuer
7 Father of Microbiology Leeuwenhoek
8 Father of Immunology Edward Jenner
9 Father of Cytology Robert Hooke
10 Father of Mycology Micheli
11 Father of Genetics G J Mendel
12              Father of Experimental Genetics              T. H. Morgan
13 Father of Bryology Johann Hedwig
14 Father of Eugenics Francis Galton
15 Father of Microscopy Marcello Malphigi
16 Father of Bio-diversity E.O. Wilson
17 Father of Medicine Hippocrates
18 Father of modern Anatomy Andreas Vesalius
19 Father of Radiation Genetics H. J. Muller

Sunday 28 September 2014

CBSE Class 7 - Science - CH3 - Fibre to Fabric (MCQs)

 Fibre to Fabric 
(MCQs)

Q1: Which of the following is NOT a Vegetable fibre?

(a) flax
(b) silk
(c) hemp
(d) jute

Q2: Vegetable fibres are made up of

(a) cellulose
(b) protein
(c) nylon
(d) rayon

Q3: Animal Fibres are made up of

(a) cellulose
(b) protein
(c) nylon
(d) rayon


Q4:  Which of the following process is NOT part of wool extraction?

Saturday 28 December 2013

CBSE Class 7 - Science - CH 14 - Electric Current and Its Effects (MCQs)

Electric Current and its Effects
(MCQs)
Why CFL is better than electric bulb?

Q1: The unit to measure electric resistance is:
 

(a) Joule
(b) Ohm
(c) Ampere
(d) Volt


Q2: The device used to make or break an electric circuit is:

(a) Resistor
(b) Battery
(c) Switch
(d) Ammeter



 

Q3: When an electric current passes through a solenoid, it acts as a/an

(a) insulator
(b) electric bell
(c) resistor
(d) bar magnet


Q4:  Which of the following is an essential element in an electric circuit?

Sunday 10 November 2013

CBSE Class 7 - Science - CH9 - Soil (MCQs)

Soil
MCQs


Q1: Which of the following soil type is loosely packed with large air spaces?
(a) Sandy Soil
(b) Clayey Soil
(c) Loamy Soil
(d) None of these


Q2: Percolation rate of water is the least in ___________?
(a) Sandy Soil
(b) Clayey Soil
(c) Loamy Soil
(d) None of these


Q3: Lentils (masoor) and other pulses are grown in which of the following soil type?
(a) Sandy Soil
(b) Clayey Soil
(c) Loamy Soil
(d) None of these

Friday 16 August 2013

CBSE Class 7 - Science - CH5 Acids, Bases and Salts (MCQs)

Acids, Bases and Salts 

CBSE Class 7 - Science - CH5 Acids, Bases and Salts (MCQs)
(MCQs)

Q1: The word acid comes from the Latin word 'acere'  which means
(a) Sweet
(b) Salty
(c) Sour
(d) Neutral


Q2: Which of the following is used in match industry.
(a) Sodium chloride
(b) Sodium bicarbonate
(c) Sodium carbonate
(d) Potassium chlorate


Q3: Acids turns blue litmus to ______
(a) green
(b) yellow
(c) red
(d) black


Saturday 13 July 2013

CBSE Class 7 - Science - CH13: Motion and Time (MCQs)

Motion and Time
MCQs

Q1: Which of the following instrument measures time with the most accuracy?

(a) sun dial
(b) sand clock
(c) quartz clock
(d) mechanical clock with gears


Q2: The basic unit of speed is:

(a) km/min
(b) m/min
(c) km/h
(d) m/s


Q3: A faster moving object covers:
 

(a) Less distance in more time
(b) More distance in more time
(c) Less distance in shorter time
(d) More distance in shorter time

Friday 28 June 2013

CBSE Class 7 - Science - CH7 - Weather, Climate and Adaptations of Animals to Climate (MCQs)

Weather, Climate and Adaptations 
of Animals to Climate 

(MCQs)
Life Cycle of Penguin
credits:wpclipart


Q1: Which of the following is NOT an element of weather?
(a) Humidity
(b) Temperature
(c) Soil
(d) Rain


Q2: A carnivore with stripes on its body moves very fast while catching its prey. It is likely to be found in:
(a) polar regions
(b) deserts
(c) oceans
(d) tropical rainforests


Q3: Which of these is specifically an adaptation for cold climates?
(a) thick fur
(b) long ears
(c) sweating glands
(d) light bones

Wednesday 5 June 2013

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

Wednesday 22 May 2013

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

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

Sunday 21 April 2013

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


Wednesday 16 January 2013

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.

Thursday 3 January 2013

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.


Thursday 20 December 2012

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

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

Saturday 17 November 2012

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

Transportation in Animals and Plants
Transportation in Animals
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:

Friday 9 November 2012

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?

Friday 28 September 2012

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