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Boojho found a bag containing the following materials. (i) Mirror (ii) Paper stained with oil (iii) Magnet (iv) Glass spectacles Help Boojho in finding out the material(s) which is/are opaque.

Solution: (i) only (iv) only (i) and (iii) (ii) and (iv) Solution: (c): Mirror and Magnet Mirror is opaque since it is painted on one side. Magnet is opaque since it is made up of iron metal.

ScienceClass 6CBSE

You are provided with the following materials (i) magnifying glass (ii) mirror (iii) stainless steel plate (iv) glass tumbler. Which of the above materials will you identify as transparent? (a) (i) and (ii) (b) (i) and (iii) (c) (i) and (iv) (iii) and (iv)

Solution: (c): Magnifying glass and glass tumbler Magnifying glass and glass tumbler are transparent materials.

ScienceClass 6CBSE

Pick one material from the following which is completely soluble in water. (a) Chalk powder (b) Tea leaves (c) Glucose Sawdust

Solution: (c): Glucose Glucose is one substance which is completely soluble in water.

ScienceClass 6CBSE

An iron nail is kept in each of the following liquids. In which case would it lose its shine and appear dull? (a) Mustard oil (b) Soft drink (c) Coconut oil (d) Kerosene Solution:

(b): Soft drink Soft drinks contain water, carbon dioxide and acid due to which iron nail is corroded and appears dull.

ScienceClass 6CBSE

What are the adaptive features of a lion that helps it in hunting?

Solution: Adaptive features of a lion that help it in hunting are as follows: It has strong paws, sharp teeth and long claws which helps it to catch and kill the Lion has brown body colour which helps it to hide itself in the dry grassland for avoiding detection by its prey. Lion has its eyes placed in front which allows it to know the exact location and movements of its prey.

ScienceClass 6CBSE

Like many animals although a car also moves still it is not considered as a living organism. Give 2-3 reasons.

Car is not considered as a living organism because of the following reasons: Car is not made up of All living organisms are made up of cells. Cell is the smallest unit of living organism which an important part of life. Car does not show response to Living organisms have the ability to sense their surroundings and respond to environmental stimuli such as, light, temperature, pollutants, water etc. Car does not show irreversible and permanent growth. Growth is an increase in the size of organisms. In living organisms growth is permanent and irreversible.

ScienceClass 6CBSE

Read the features of plants given below. (a) Thick waxy stem (b) Short roots (c) Cone shaped plants (d) Sloping branches (e) Small or spine-like leaves (f) Hollow stem Choose the type of plant for every feature given in a, b, c, d, e and f from the list given below. Aquatic plant, Desert plant, Mountainous plant

Thick waxy stem - Desert plant Short roots - Aquatic plant Cone shaped plants - Mountainous plant Sloping branches - Mountainous plant Small or spine-like leaves - Desert plant Hollow stem - Aquatic plant

ScienceClass 6CBSE

1What are the specific features present in a deer that helps it to detect the presence of predators like lion?

Specific features present in deer that help them to detect the presence of predators like lion are: Deer’s have long ears which help to hear and recognize the movement of Eyes on the sides of its head which allow it to look in all

ScienceClass 6CBSE

Some desert plants have very small leaves whereas some others have only spines. How does this benefit the plants?

Desert plants have good adaptability to conditions like water scarcity hence they tend to conserve water. Small leaves and spiny plants are modifications of leaves which help the surface of leaf lamina, in preventing water loss during transpiration.

ScienceClass 6CBSE

Write the adaptation in aquatic plants due to which (a) Submerged leaves can bend in the flowing water. Leaves can float on the surface of water.

Submerged leaves are long narrow and ribbon which can easily bend in flowing water and withstand water currents without getting damaged e.g., tape grass. Leaves are long, hollow and light which help the leaves to float over water

ScienceClass 6CBSE

Mention one adaptation present in the following animals. (a) In camels to keep their bodies away from the heat of sand. (b) In frogs to enable them to swim. (c) In dolphins and whales to breathe in air when they swim near the surface of water.

<p><strong>Solution:</strong></p><ul><li>Camels which have long legs help them to keep the upper part of the body away from the heat of the sand.</li><li>Frogs which have webbed feet enables frog to swim in</li><li>Dolphins and whales which have blow holes help them to breathe in air when they arise to the surface of water.</li></ul>

ScienceClass 6CBSE

Why do desert snakes burrow deep into the sand during the day?

Desert snakes burrow deep into the sand during the day because the deeper layers of sand are cooler, and to stay away from heat of the desert during day time.

ScienceClass 6CBSE

Paheli has a rose plant in her garden. How can she increase the number of rose plants in the garden?

Paheli can increase the number of rose plants in the garden by plant propagation method i.e., planting stem cuttings of rose plant. About 20-30 cm long pieces of one year old stems are cut and their lower ends are planted in the soil.

ScienceClass 6CBSE

Fill in the blanks. (a) Saline water, hot air and sand are components of a habitat. (b) The habitat of plants and animals that live in is called the aquatic habitat. (c) enables a plant or an animal to live in its surroundings. (d) Plants and animals that live on land are said to live in habitats. Solution:

Abiotic (non-living) Water Adaptations Terrestrial

ScienceClass 6CBSE

Why is reproduction important for organisms?

Reproduction is very important for living organisms as it helps them to produce young ones of their own kind and maintains the continuity of their species.

ScienceClass 6CBSE

Classify the following habitats into terrestrial and aquatic types. [Grassland, Pond, Ocean, Rice field]

Terrestrial habitats – Grassland, Rice field Aquatic habitats – Pond, Ocean

ScienceClass 6CBSE

Unscramble the given words below to get the correct word using the clues given against them. (a) SATPADAOINT: Specific features or certain habits which enable a living being to live in its surroundings (b) RETECOXNI: Waste products are removed by this process (c) LUMISIT: All livings things respond to these ROUCDPRENTOI: Because of this we find organisms of the same kind

Solution: Here are the correct words: ADAPTATIONS EXCRETION STIMULI REPRODUCTION

ScienceClass 6CBSE

If you happen to go to a desert, what changes do you expect to observe in the urine you excrete? You would (i) excrete small amount of urine (ii) excrete large amount of urine (iii) excrete concentrated urine (iv) excrete very dilute urine Which of the above would hold true? (a) (i) and (iii) (b) (ii) and (iv) (c) (i) and (iv) (i) and (ii)

: (i) and (iii) Excreting small amount of concentrated urine helps to conserve water in the body. Humans adapt to desert environment by excreting small amount of water.

ScienceClass 6CBSE

Although organisms die, their kind continues to live on earth. Which characteristic of living organisms makes this possible? (a) Respiration (b) Reproduction (c) Excretion Movement

Solution: : Reproduction Reproduction is one of the most important characteristic of the living organisms by which their kind continues to live on earth. Reproduction is a biological process by which an organism produces young ones of its own kind.

ScienceClass 6CBSE

1. Choose the odd one out from below with respect to reproduction. (a) Eggs of hen (b) Seeds of plants (c) Buds of potato Roots of mango tree

Solution: (d): Roots of mango tree Roots of mango tree have no role in reproduction. Eggs of hen and seeds of plants are products of reproduction. Buds of potato are vegetative reproductive parts that can form new plants.

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