المراجعة النهائية فى الساينس science رابعة ابتدائى نظام حديث2022

Q1) Choose the correct answer:

1. Bats sleep (hang) …………………
a. on backs           b. upside down    c. upright
2. ………………. is a technique used by bats to know to know the location of the prey.
a. Echolocation      b. Adaptation     c. Countershading
3. Bull shark can live in …………….
a. fresh water only         b. sea water only           c. (a) and (b)
4. Chameleons have …...-shaped feet.
a. U             b. V            c. S
5. Caracal is a …………… animal.
a. herbivorous          b. carnivorus               c. no correct answer
Q2) Write the scientific term:
1. An animal that can hide from its enemies through countershading.[ ……………. ]
2. An animal that has large ears to hear its preys on sand.[ …………………………. ]
3. A bat-like technology. [ …………………………. ]
4. A type of adaptation includes activities or behaviors that help an animal to survive. [ …………………………. ]
5. A type of adaptation includes changing some parts of the animal's body (shape, body covering, ….). [ …………………………. ]
Q3) Complete each of the following:
1. …………….. can move each eye independently to watch two different things at the same time.
2. Chameleon has …………………. Or dark coloration on top and light coloration on the underbelly.
Evaluation
3. Migration of birds in winter to get food is an example of…………………. adaptation.
4. Bats are ………………... animals.
5. Penguin's feet keep ……………. Due to the blood flow inside blood vessels within feet.
Q3) Give a reason for:
1. Bats are important to the humans.
………………………………………………………………………………………………….
2. Penguin's feet keep warm.
………………………………………………………………………………………………….
3. Chameleon has V-shaped feet.
…………………………………………………………………………………………………..

Q4) What happens when:
1. The blood vessels carrying the warm blood from the warm parts of the penguin's body coil around the other blood vessels carrying the cold blood from the cold feet.
………………………………………………………….……………………………………..
2. A polar bear blend with snow.
………………………………………………………………………………………………….
1. …………… of canopy acacia trees secrete (produce) poisons.
a. Leaves            b. Roots      c. Trunk
2. Kapok tree has ……………..-shaped leaves.
a. foot                 b. hand           c. V
3. The ………… surfaces of the leaves of water lily plant are covered with wax.
b. lower        b. upper             c. (a) and (b)
4. Chameleons have …...-shaped feet.
b. U              b. V           c. S
5. Acacia tree has very long roots to ………………….
a. reach deep underground water.
b. keep the water away from it.
c. protect itself from the animals.
d. no correct answer.
Q2) Put (ü) or (û):
1. White and pink flowers of kapok trees produce and odour (smell) to let the bats go away from them. ( )
2. The upper surface of water lily leaf is covered with thorns to keep the animals away from it. ( )
3. The tap roots of Canopy acacia trees reach to the depth of 15 metres only. ( )
4. Mangrove tree has a very special type of roots, called aerial roots.( )
5. The canopy acacia tree that was being eaten gave off a warning gas.( )
Evaluation
Q3) Give a reason for each of the following:
1. Large butress roots are very important for Kapok trees.
……………………………………………………………………………………………………
2. The canopy acacia tree gave off a warning gas.
……………………………………………………………………………………………………
3. The leaves of canopy acacia tree produce poison.
………………………………………………………………………………………...…………
4. Acacia tree has very long roots
………………………………………………………………………
5. Some pine trees have short branches and thorns instead of leaves.
…………………………………………………………………………………………
Q4) What happens when:
1. The upper surface of the water lily leaf isn't covered with wax.
………………………………………………………………………...
2. The prickly pear has no spines.
………………………………………………………………………...
3. Roots of Acacia tree are very short.
………………………………………………………………………
4. Mangrove tree has no aerial roots.
………………………………………………………………………
5. The canopy acacia tree can't produce a warning gas.
………………………………………………