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Which of the following is not a correct match? (a) Petiole: attaches the leaf to stem (b) Lamina: green flat part of the leaf (c) Margin: gives shape to the leaf (d) Veins: transpiration

d) Veins: transpiration In transpiration the evaporation of water takes place, the process is done by stomata of the leaves. The veins are like... View Article

Which of the following is not the primary function of the stem? (a) Conduction of water (b) Photosynthesis (c) Formation of branches (d) Bears flowers and fruits

b) Photosynthesis. Photosynthesis is the primary function of leaves. The important functions of a stem include: A stem carries out a number... View Article

Which of the following is the correct match between the characteristics of the stem and the category of a plant? (a) The weak stem which cannot stand upright: Creeper (b) Green tender stem: Shrub (c) Thick, hard stem with branching near the base: Tree (d) Thick, hard stem with branches high on the plant: Herb

a) Weak stem which cannot stand upright: Creeper A plant that has thin, long and weak stem is called creeper. It cannot stand upright and... View Article

Which of the following combination of features would you observe in the grass? (a) Parallel venation and fibrous root (b) Parallel venation and taproot (c) Reticulate venation and fibrous root (d) Reticulate venation and taproot

a) Parallel venation and fibrous root Parallel venation and fibrous roots are usually found in grass, maize, wheat etc. In parallel venation,... View Article

Explain the process of rooftop rainwater harvesting with the help of a suitable diagram.

Rooftop rain water harvesting is a method where ran water that falls on the rooftop of a building or house, is collected into storage tanks... View Article

Dissolve two spoons of common salt in half a cup of water. Now if you want to get the salt back, what will you do?

To get salt back from a half cup of water with two spoons of common salt already dissolved in it, we can either heat the water in a pan on a... View Article

Draw a diagram to show how sea water reaches a lake or pond.

The sun is the ultimate source of energy, and it powers most of the evaporation that occurs on earth. Evaporation generally happens when water... View Article

Most of the water that falls on the land as rain and snow, sooner or later goes back to a sea or an ocean. Explain how it happens?

Most of the water that falls on the land as rain and snow, sooner or later goes back to a sea or an ocean. This happens in the following manner-... View Article

Fill in the blanks selecting words from, the following list. Snow, rain, clouds, vapour, evaporation, transpiration. Water, as ____ goes into atmosphere by the processes of _ and _ and forms , which on condensation fall in the form of and ___.

(i) vapour. (ii) evaporation. (iii) transpiration. (iv) clouds. (v) snow. (vi) rain. The water cycle has a tremendous impact on the... View Article

Why is there a need for conserving water? Give two reasons.

Conservation of water mainly refers to protect, preserve, and control the usage of water and its resources. It is the system introduced to manage... View Article

How do the areas covered with concrete affect the availability of groundwater?

The areas that are covered with concrete lower the availability of ground water because such areas reduce the seepage (entry) of rainwater into... View Article

Water kept in sunlight gets heat from sun and is evaporated. But how does water kept under the shade of a tree also get evaporated? Explain.

Water gets evaporated despite being under the tree during the daytime because the air surrounding the tree also gets heated up from the presence... View Article

Why do wet clothes placed on a clothes line get dry after some time? Explain.

Wet clothes placed on a clothes line get dry after some time because the water gets dried up from the heat of the sun. The water is converted... View Article

Write any two activities which require less than one bucket of water.

Two activities that require less than one bucket of water are- Brushing teeth Making one page of a book Water is the medium through... View Article

Write any two activities which require more than a bucket of water.

Two activities that require more than a bucket of water are- Washing a huge number of clothes Irrigating a crop field. Water is one of the... View Article

“Catch water where it falls” is the basic idea behind (a) recycling of water (b) making dams to store water (c) rainwater harvesting (d) condensation of water vapour.

(c) rainwater harvesting Rainwater harvesting is a method used to collect rainwater. By storing the water, we can increase the availability of... View Article

Floods causes extensive damage to (a) crops (b) property and human life (c) domestic animals (d) all of the above

(d) all the above A flood is an overflow of water on land. Sometimes a river might receive extra water, either from heavy rains or other... View Article

Wells are fed by (a) pond water (b) lake water (c) rain water (d) groundwater

(d) groundwater When it rains, the water fills up the lakes and ponds. Some water gets absorbed by the soil and ground and the remaining water... View Article

Clouds are (a) tiny drops of water floating in air (b) mixture of dust and water vapour (c) particles of water vapour (d) rain drops in air.

a) Tiny drops of water floating in the air. Clouds are an important part of the earth’s weather and climate.Clouds form from water... View Article

Transpiration is a process in which plants (a) receive water from soil (b) absorb water vapour from air (c) prepare food from water (d) release water vapour

(d) release water vapour. During the process of transpiration, water molecules in the plant tissues are removed from the aerial parts of the... View Article

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