First term
Al – Karma Language School
Science
Prep 1
Final revision 3 on unit 3 (Science book)
(Model answer)
Question (1):
Choose the correct answer:
1. The scorpion belongs to ----------------------.
(insects – myriapods –arachnids – mammals)
2. ------------ is an example for plants that reproduce by spores.
(Pine – Bean – Vougheir – Wheat)
3. ---------------- are from the animals which don’t have a body
support.
(Reptiles – Snails – Jellyfishes – Lions)
4. The number of pairs in scorpion legs is ---------------.
(3 – 4 – 44 – 100)
5. The examples of living organisms that undergoes hibernation is the ---------.
(desert snail – jerboa – frog – all the above)
6. Water is stored in the leaves of --------------- plant.
(elodea – cactus – calamagrostis - wheat)
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First term
Al – Karma Language School
Science
Prep 1
7. Leaves are reduced into spines in ---------- plant.
(opuntia – cactus – calamagrostis – elodea)
8. There air chambers in the leaves of ----------- plant.
(opuntia – cactus – calamagrostis – elodea)
9. The number of the anterior fingers in a hawk is -----------.
(3- 4 – 2 – 1) finger(s).
10.
----------- belongs to the animals with no body support.
(Octopus – Mussel – Hedgehog – Snake)
11.
Camel can survive without drinking water for -----------.
(3days - 3 weeks – 3 months – a week or more)
12.
Pea plant belongs to ----------- plants.
(fern – monocotyledon – dicotyledon – gymnosperm)
13.
---------is from animals that undergo aestivation.
(Rat – Frog – Reptiles -Desert snails)
Question (2)
Complete the following statements:
1.
2.
Sloth and armadillo are teeth less mammals.
Arthropods can be classified according to the number of legs into
insects , arachnids and myriapods.
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First term
Al – Karma Language School
Science
Prep 1
3.
The size and the way of reproduction are used in classifying plants.
4.
Some plants have large – sized leaves such as banana plant and
some has small – sized leaves such as molukiyah plant.
5.
Species is the basic unit of classification in living organisms.
6.
Drosera and Dionea are examples for insectivorous plants.
7.
Hawks have sharp crooked beaks to tear the prey, while ducks
have wide indented beaks to filter food from water.
8.
Horses’ limbs end in solid part hoof to run over rocky soil while
camel limbs end in thick flat part pad to walk on hot sandy soil.
9.
The whale front limbs are modified into paddles to perform
swimming to take the role of Swimming while they modified in the bat
into wings to take the role of flying.
10. Euglena and paramecium are examples for micro- organisms that
live in water.
11. The number of rat’s upper jaw incisors is one pair and their number
in the rabbit’s upper jaw is two pairs.
12. Armadillo belongs to edentates (teeth less) mammals and the
hedgehog belongs to having teeth extended outwards mammals
13. Camel’s blood temperature changes from 34°C in early morning into
41°C during daylight hours.
14. Vougheir is from the plants that reproduce by the formation of
spores while Pine is from the plants that produce seeds inside cones.
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First term
Al – Karma Language School
Science
Prep 1
Question (3):
A)-Give reason for:
1. Hedgehog has front teeth extending outwards.
To capture the insects and get food.
2. Some plants pounce insects.
They can’t make proteins because they can’t absorb the nitrogenous substances
needed to make proteins from the soil.
3. Some birds have long thin beaks and their long legs end in thin claws.
They have long thin beaks to help them to pick up worms& snails and long thin
legs to help them to walk in the existence of water.
4.Some animals undergo hibernation.
To overcome the decreasing of the temperature.
5. Some species of birds migrate from their original regions in winter.
To escape from low temperature to warmer region to reproduce and get food.
6. Camel’s fur is distributed at different densities on its body regions.
To protect camel from extreme cold temperature at night and from sandstorms.
B)-Give an example showing each of the following:
1. Camouflage in insects.
(Leaf or stick insects)
2. Hibernation in mud.
(Frog)
3. Aestivation in humid burrows.
(Desert snails or jerboa)
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First term
Al – Karma Language School
Science
Prep 1
C)-Give one difference between each of the following:
1. Rodents and lagomorphs.
Rodents have one pair of incisors in each jaw such as rat and squirrel but
lagomorphs have two pairs of incisors in the upper jaw& only one pair in the lower
jaw such as rabbit.
2. Beans plant and maize plant.
Beans are from dicotyledon plant but maize is from monocotyledon plant.
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