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REPRODUCTION IN ANIMALS Class 8 Chapter 9

7 Comments / Class VIII Science / VKSCIENCE

Reproduction, Asexual Reproduction, Budding, Buds, Binary Fission, Sexual Reproduction, Male reproductive organs, Sperms, Male gametes, Female Reproductive organ, ova (eggs), Female gamete, Fertilization, Internal Fertilization, External Fertilization, Zygote, Embryo, Foetus, I.V.F. ( In vitro fertilization), Test tube babies, Oviparous animals, Viviparous animals, Metamorphosis, Tadpole (larva), Cloning, Dolly Sheep

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LIGHT Class VIII Chapter 16

Leave a Comment / Class VIII Science / VKSCIENCE

The light coming out of a torch is a beam of light. The beam of light is made up of light rays. Simply, a narrow beam of light is called as ray. When a light ray falls on a reflective surface like mirror, it gets reflected in other direction with some angle.

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WEATHER, CLIMATE AND ADAPTATIONS OF ANIMALS TO CLIMATE Chapter 7 Class 7

11 Comments / Class VII Science / VKSCIENCE

Weather, Climate, Weather report, Elements of weather, Temperature, Rainfall, Humidity, Monsoon, Monsoon Types, Types of climate in India, Adaptation, Adaptive features, Polar region, Polar region countries, Polar region areas, Polar Bears, Penguins, Migrating birds, Migratory birds, Tropical rainforest, Elephants, Red eyed Frog, Lion Tailed Macaque, Toucan, New world Monkey

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Model specimen showing symbiotic association in root nodules of leguminous plants, Cuscuta on host and Lichens

Common disease causing organisms like Ascaries, Entamoeba, Plasmodium, Any fungus causing ring worm through permanent slides, models, virtual images or specimens. Comment on symptoms of diseases that they cause.

Leave a Comment / Science Question Bank / VKSCIENCE

Common disease causing organisms like Ascaries, Entamoeba, Plasmodium, Any fungus causing ring worm through permanent slides, models, virtual images or specimens. Comment on symptoms of diseases that they cause.

Aim-Controlled pollination-emasculation, bagging and tagging

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Materials Required-Plants with large bisexual flowers, Tweezers, Scissors, Brush, Alcohol, Rubber bands / threads, Polythene bags, Tags, Magnifying Glass etc. Principle-Controlled pollination is a step of artificial hybridization. Emasculation is followed by a controlled pollination. The process of removal of stamens from bisexual flowers in order to prevent self-fertilization is called emasculation. Emasculation is carried

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Preparation and analysis of Pedigree Charts of any one of the genetic traits such as rolling of tongue, blood groups, ear lobes, widow’s peak and colour blindness in a selected special family. Class 12 Biology

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Aim-Preparation and analysis of Pedigree Charts of any one of the genetic traits such as rolling of tongue, blood groups, ear lobes, widow’s peak and colour blindness in a selected special family. Principle– The Mendelian concept of dominance and segregation can also be studied in humans by preparing and then analyzing the pedigree charts. The

Preparation and analysis of Pedigree Charts of any one of the genetic traits such as rolling of tongue, blood groups, ear lobes, widow’s peak and colour blindness in a selected special family. Class 12 Biology Read More »

CHEMICAL REACTIONS AND EQUATIONS class 10 chapter 1

STARS AND THE SOLAR SYSTEM Class 8 Chapter 17

6 Comments / Class VIII Science / VKSCIENCE

The sun, the moon, stars, planets and other objects that we see in the sky are called heavenly bodies or celestial objects. Those celestial bodies which emit heat and light of their own are called stars. The stars appear to move from east to west due to the rotation of the earth from west to east.

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HUMAN HEART

Leave a Comment / PISA QUESTIONS CLASS VI-VIII / VKSCIENCE

The blood circulatory system consists of heart and blood vessels. Heart is a vital organ located in chest cavity. It beats continuously to act as pump for transport of blood. It has four chambers. There are two upper auricles and two lower ventricles make four chambers in the human heart. The rhythmic contraction and expansion of heart is called heart beat. The human heart beats about 70-80 times per minute in an adult person. This is called heart rate. The four chambered heart separates the oxygenated blood from deoxygenated blood. The main artery is aorta. The pulmonary artery carries deoxygenated blood from heart to lungs. The pulmonary vein carries oxygenated blood from lungs to heart.

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