How can soil be protected from pollution?

Q uestion 1: What is meant by:

1- Soil pollution:

Any change in the environment that disturbs its natural balance and harm living organisms.

2 - Chemical pesticides:

Chemical substances used to eradicate pests of plants.  

3 - Chemical fertilizers:

chemical substances used to increase soil fertility.  

Q uestion 2: Complete the following:

1- From the agricultural soil pollutants are ……… and ……… .

chemical pesticides – chemical fertilizers  

2 - Industrial wastes cause ……… .

soil pollution  

3 - Spacing periods of irrigation leads to ……… and ……… .

dry soil – increase salinity

4 - Most of soil pollution occurs due to ……… activities.

wrong man  

5 - Soil can be protected from pollution by ………, ………, ……… .

Rationalization of using of pesticides.

Using natural fertilizers.

Remove factories from agricultural land.

Q uestion 3: Give reasons for:

1- We should depend on natural fertilizers.

Because it doesn’t make pollution for soil.  

2 - Factories should be removed from agricultural soil.

To avoid industrial wastes that pollute the soil.

3 - Soil should be irrigated regularly.

To avoid increasing soil salinity.  

4 - We should rationalize using of pesticides.

To avoid soil pollution.  

Q uestion 4:

Write some soil pollutants:

1- Pesticides 2- Fertilizers 3- Soil salinity 4- Industrial wastes  

Q uestion 5: Correct the word between brackets:

1- (Natural) fertilizers pollute the soil.

artificial

2 - Dry soil is caused by (regular) irrigation.

spacing  

3 - Pesticides (benefit) the soil.

harm  

4 - Soil salinity causes a (good) effect on soil.

bad

Q uestion One: A: Choose the correct answer:

1- The silt soil compactness is ……… . (strong – weak – medium – very weak)

 medium

2 - The heart consists of ……… chambers. (one – two – three – four)

four

3 - The speedy cars are designed with ……… shape. (flat – circular – streamline – wide)

 streamline

4 - The water resistance depends on ……… . (speed of object – surface area – kind of surface – all the previous)

all the previous

B :Compare between:

1- Atria and ventricles

2 - White blood cells and red blood cells

Q uestion Two: A: Give reasons for:

1- Friction force is important for people.

Because it helps them to walk without slipping down.  

2 - Blood platelets help in saving our life.

Because they help in stop bleeding and make blood clot.

3 - Sand soil keeps small amount of water.

Because it has large spaces between its particles.

B :What is meant by :

1- Friction force

The force that arises between two bodies when they touch each other

2 - Vein

The blood vessel that carries blood from body parts to heart.  

Q uestion Three: A: Write the scientific term:

1- The remains of the decayed organisms.

Humus  

2 - The friction force between moving objects and air.

Air resistance  

3 - Liquid materials that are used to decrease friction.

Lubricants and oil  

4 - One of blood components that transfer digested food.

Plasma  

B : What will happen if?

1- No grooves exist on car tires.

Friction with ground decreases.

2 - Speed of moving object increases.

Air resistance will increase.