A freely suspended magnet always comes to rest in the ________direction

(a)

North - east

(b)

South - west

(c)

East - west

(d)

North - south

Which of the following processes add water vapour to the atmosphere?
i. Transpiration
ii. Precipitation
iii. Condensation
iv. Evaporation

(a)

ii and iii

(b)

ii and iv

(c)

i and iv

(d)

i and ii

Using R.O. (Reverse Osmosis) plant at home eliminates lot of non-potable water. The best way to effectively use the expelled water of R.O. plant is________.

(a)

make the expelled water go and seep near the bore well

(b)

use it for watering plants

(c)

to drink the expelled water after boiling and cooling

(d)

to use for cooking as the water is full of many nutrients

The saponification of a fat or oil is done using _______________ solution for hot process.

(a)

Potassium hydroxide

(b)

Sodium hydroxide

(c)

Hydrochloric acid

(d)

Sodium chloride

Producers are________

(a)

Animals

(b)

Birds

(c)

Plants

(d)

Snakes

Usage of chemical pesticides and fertilisers causes ________ pollution.

(a)

Air pollution

(b)

Water pollution

(c)

Noise pollution

(d)

None of the above

One of the following birds is an example of plant pollinator

(a)

Duck

(b)

Parrot

(c)

Humming bird

(d)

Dove

Which of the following is not a root ?

(a)

Potato

(b)

Carrot

(c)

Radish

(d)

Turnip

Find out Paid and Proprietary software from the given list

(a)

Windows

(b)

MAC OS

(c)

Adobe Photoshop

(d)

All the above

_________is a Operating System.

(a)

Android

(b)

Chrome

(c)

Internet

(d)

Pendrive

Artificial magnets are made in different shapes such as __________, __________ and ____________.

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Oval shape, Disc shape, Cylindrical shape

Water cycle is also called as_______.

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hydrological cycle

___________ fertilizer is ecofriendly.

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Natural (Organic)

The 3R’s are Reduce, __________ and Recycle.

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 Reuse

The edible seeds of leguminous plants are called_________.

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Pulses.

Frozen water

(1)

NaOH

Soap

(2)

Geogebra

Gypsum

(3)

Pole

Software

(4)

Input Device

Keyboard

(5)

CaSO₄.2H₂O

How do people in cities and rural areas get water for various purposes?

Explain the uses of plaster of paris.

Define ecosystem.

Give one example of a food chain in an aquatic ecosystem?

What are the uses of timber?

Take a glass of water with a few pins inside. How will you take out the pins without dipping your hands into water?

About 71% of earth’s surface is covered with water, then why do we face scarcity of water?

To clean the spectacles, people often breathe out on glasses to make them wet. Explain why do the glasses become wet.

Why earthworm is called as farmer’s friend?

What is biodegradable waste?

Look at the diagram given below and answer the following questions.
a. Soil fertility is increased by bacteria. How?

b. Honey bees are essential for the reproduction of the plants Why?

What is Hardware and Software?

How does the electromagnetic train work?

What is potable water? List down its characteristics.

Who is known as waterman of India? Browse the net and find the details about the award, the waterman received for water management. State the findings by drafting a report.

How are detergents manufactured?

Write a short note on noise pollution.

Write short notes on – Timber yielding plants.