Match the following. 1. Lever a. In steering wheel 2. Pulley b. Slider in the park 3. Wheel and axle c. To cut a large piece of wood 4. Wedge d. Scissors to cut paper 5. Screw e. To draw water from well 6. Inclined plane f. To hold two pieces of wood together

A lever is a rigid board or bar that turns on a support point. It is used to lift or move heavy objects, cut things, and open tin lids.Scissors are examples of this. A pulley is a simple machine that has a grooved wheel with rope running between the grooves of the wheel. It is used to draw water from the well. Wheels and axles are used to lift heavy weight. The wheel and axle enable a small force applied at the wheel to move a heavy object at the axle. The steering wheel is an example of this. A wedge has one or two slanting or inclined planes that together form a sharp edge. It is used in cutting, splitting, and piercing tools. A screw looks like a nail wrapped with grooves, but actually it is an inclined plane wrapped around a rod with a pointed end. It is used to hold two things tightly together. An inclined plane is a sloping surface that makes it easy to raise or lower a load. A smaller effort is needed to move a heavy object up an inclined plane than to lift it straight up. Lever Scissors to cut paper Pulley To draw water from well Wheel and axle In steering wheel Wedge To cut a large piece of wood Screw To hold two pieces of wood together Inclined plane Slider in the park

transfers a force from one place to another

changes the direction of a force

increases the magnitude of a force

EASY

Earn 100

What are the different types of fertilizers and insecticides that have been used from the long time? Write in the table.

Uses in farming Many years ago At the time of grandparents At present

Fertilizer

Insecticide

Important Questions on A Seed Tells a Farmer’s Story

MEDIUM

Environmental Studies>Life Science>A Seed Tells a Farmer’s Story>Agriculture

Early man used horses to plough the field.

EASY

Environmental Studies>Life Science>A Seed Tells a Farmer’s Story>Agriculture

Choose the right word and fill in the blank provided below.

Natural manures are called _____. (pesticides/ bio-fertilisers)

HARD

Environmental Studies>Life Science>A Seed Tells a Farmer’s Story>Agriculture

Define agriculture. What are the various steps involved in agriculture?

EASY

Environmental Studies>Life Science>A Seed Tells a Farmer’s Story>Agriculture

_____ leaves keep the insects away.

EASY

Environmental Studies>Life Science>A Seed Tells a Farmer’s Story>Agriculture

Traps may be used to catch _____. (cats/ rodents)

EASY

Environmental Studies>Life Science>A Seed Tells a Farmer’s Story>Agriculture

Synthetic fertilisers used should be _____ soluble.

EASY

Environmental Studies>Life Science>A Seed Tells a Farmer’s Story>Agriculture

Fill in the blank using the option given in the bracket:
[bullock, sheep, tractor, cart]
The early man used the _____ to plough the field.

MEDIUM

Environmental Studies>Life Science>A Seed Tells a Farmer’s Story>Agriculture

Chemical fertilizers and pesticides help plants to grow quickly. They also help plants to give more fruit. However, some people say that using fertilizers is not good for plants, and that it would be better for farmers to use natural (organic) fertilizers. What do you think? Find out what you can about organic farming.

EASY

Environmental Studies>Life Science>A Seed Tells a Farmer’s Story>Agriculture

Wheat requires _____ (less/more) water.

MEDIUM

Environmental Studies>Life Science>A Seed Tells a Farmer’s Story>Agriculture

A doorknob is an example of:

MEDIUM

Environmental Studies>Life Science>A Seed Tells a Farmer’s Story>Agriculture

What do we add to soil to make it more fertile?

EASY

Environmental Studies>Life Science>A Seed Tells a Farmer’s Story>Agriculture

Most crops are grown from _____.

EASY

Environmental Studies>Life Science>A Seed Tells a Farmer’s Story>Agriculture

Dried neem leaves are used while storing silk clothes.

MEDIUM

Environmental Studies>Life Science>A Seed Tells a Farmer’s Story>Agriculture

Match the following.

1. Lever	a. In steering wheel
2. Pulley	b. Slider in the park
3. Wheel and axle	c. To cut a large piece of wood
4. Wedge	d. Scissors to cut paper
5. Screw	e. To draw water from well
6. Inclined plane	f. To hold two pieces of wood together