Exam Two

Q uestion One: Complete the following:

1- The friction force between water and objects that moves through is called ……… .

water resistance  

2 - The Urine is expelled by the ……… .

kidney

3 - The biggest artery is called ……… .

aorta  

4 - To decrease friction inside machines we use ……… .

ball bearing  

5 - The circulatory system consists of ………, ……… and ……… .

heart – blood – blood vessels  

Q uestion Two: Write the scientific term:

1- The wall that separates between the two sides of heart.

Septum  

2 - The most aerated soil.

Sand soil  

3 - The origin of the agricultural soil in Egypt.

Ethiopian plateau  

4 - The upper rooms of heart.

Atria

5 - The force responsible for moving cars and changing their direction.

Friction  

Q uestion Three: Compare between:

1- Clay soil and silt soil: (three points)

2 - Artery and vein

Q uestion Four:

Write the advantages and disadvantages of friction force:

Q uestion One: Choose the correct answer:

1- The heart is a muscular pump in size of your ……… . (fingers – foot – head – fist)

fist

2 - The best type of soil is the ……… soil. (clay – sand – silt – rocky)

 silt

3 - The system which gets rid of urine is the ……… system. (circulatory – digestive – respiratory – urinary)

urinary

4 - The organ that prevents return back of blood inside heart is ……… . (spectum – ventricle – valve – vein)

vein

5 - The cells that protect the body from diseases ……… . (red blood cells – white blood cells – platelets – plasma)

 white blood cells

Q uestion Two: Give reasons for:

1- Skin has excretory function.

Because it helps to get rid of sweat and excess salts.  

2 - Car tires have inscriptions.

To increase friction and squeeze water out.  

3 - Ball bearing is essential in machines.

To decrease friction and prevent their damage.  

4 - Clay soil retains large amount of water.

Because it has very small spaces between particles.  

Q uestion Three: Correct the words between brackets:

1- Oil is used to (increase) friction force.

decrease  

2 - Friction force increases between (smooth) surfaces.

rough

3 - The streamline shape (increases) friction.

decreases  

4 - The heart consists of (four) sides.

two  

5 - The strawberry can grow in (clay) soil.

sand

Q uestion Four: Complete the following:

1- The blood consists of ……… white blood cells, ……… and ………. .

red blood cells – plasma – platelets  

2 - The blood circulation between the heart and lung is known as ……… blood circulation.

minor

3 - Carbon dioxide and water vapour can be expelled out by ……… .

lungs

4 - The two ureters transfer ……… to urinary bladder.

urine  

5 - The earth worm help in ……… the soil.

aerating