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Social studies : Grade 6
2nd quarter
Revision sheet
Name:----------------------------------
Class: 6----
I. Complete the following sentences:
1. --------------------------is a group of trees plants, animals and insects that
live together and interact within their natural habitat.
2. All living organisms within an ecosystem stay alive through a process
known as ----------------------------------3. -----------------------------------------is humid and dark, because the higher
layers block out the sunlight from reaching the ground.
4. The grass gets eaten by animals such as; -------------------------which are
called---------------------,but meat eating animals like--------------------------are called----------------------------5. Some ecosystems have dry and warm climate like------------------,while others have a wet and humid climate like------------------------6. The soil in the desert does not contain enough-------------------------and------------------for vegetation to grow.
7. ---------------------------------is the most common type of desert plant,
because-----------------------------------------------------------------------8. Dead plants and leaves decay quickly in ----------------------layer with the
help of decomposers such as; earth worms.
9. The rainforest are divided into four layers----------------------------------,-------------------------------,-----------------------------,and------------------------.
10.The desert landscape is------------------with little naturally growing-------------------------1
11. The largest rainforest is------------------------------------------12. The tropical climate, during------------------------------,it’s common to
rain heavily on a daily basis , As for the------------------------------,rainfall
does not stop completely but not as heavy as the wet season.
13. -----------------------------------are called “the lungs of the world”
because ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------14. Vegetation in the rainforest is layered into levels of height, which
are-------------------------,-----------------------------,-------------------------------,--------------------------------------15. A food chain starts with -----------------------------16. All the plants and shrubs that grow in ----------------------layer have
adapted to catch a few sun light.
17. --------------------------,-----------------------and----------------------are
animals that live on the forest floor.
18. Seasons do not change in tropical rainforest , the only element that
change is------------------------------------19. It is common to grow plants that live in -----------------------layer
inside your home as houseplants ,because they do not need a lot of
sunlight to survive.
20. -------------------------------------is a substance that is used to make gum.
21. ---------------------------layer is the busiest part of the rainforest ,
because----------------------------------------------------------------------------------------------------------------------------------------------------------------------------22. ------------------------------------------------------------------------------------are animals that live in the canopy layer.
23. -----------------------------is the highest layer in the rainforest.
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24. -----------------------------------------are the animals that live in the
emergent layer.
25. When people of the rainforest moves to big city, they suffer from
----------------------------------------------------------------------------26. The uses of the rainforest are-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------27. The rainforests of the world are in danger, because of------------------28. Deforestation negatively affects the rainforest in many ways such as;
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------29. Animals that live in understory layers are---------------------------------------------------------------------30. -------------------------------------------------------------------------------------are
examples of animals that can be found in understory layer.
31. ---------------------------------------------------is a very effective method of help
preserving our rainforests.
32. ---------------------------------acts as huge sponge to absorb rainwater to stop
it from flowing into rivers or seas.
33. Medical Professionals have discovered that some rainforest plants can
provide them with chemicals to treat ----------------,--------------and-------------34. Deforestation is-------------------------------------------------------------------3
35. ------------------------------layer catches the most sunlight, and exposed to the
wind ,so that emergent trees have----------------------and-------------leaves that
protect them the sun and wind.
36.To save the rainforest ,we have to discourage buying the products that are
made from the rainforest creatures such as;------------------------------------------------------------------------------------------------------------------------------------37. Deserts are mainly concentrated in-------------------and--------------------------38. The most famous deserts are---------------------------------------------------------39. Scientists use an instrument called --------------------------------------- to
measure the size of the earthquake and how powerful it was.
40 . --------------------------------------is one of the richest ecosystems, because it’s
estimated that------------------------------------------------------------------------41.Desert climate is usually -------------------------------during the day,
but when the sun goes down it can get----------------------and------------42. -------------------------are the ways to show the location of the
different ecosystems on a map using color-coded zones.
43. -------------------------are located around the equator in part of
-------------------,----------------------,-------------------,and----------------44. -------------------------------are considered to be the most wellknown animal of the desert, because-------------------------------------------------------------------------------------------------------------------------------45. ----------------------------------are made up of half lava and half
pyroclastic material.
46. Camels are used as form of transportation for------------------------47. Tourists who visit the desert should be well prepared for the
excessive heat and dehydration by-------------------------------------------4
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------48. -------------------------------are constantly shifting , but when the
plates move against each other , they can build up ------------------ and
-------------------, which cause earthquakes .
49. --------------------------are the largest volcanoes in the world.
50. ------------------------------which consists of the crust and the upper
mantle , is where the earth’s tectonic plates are found.
51. ------------------------------------are made up of basalt, a generally
dark volcanic lava that is made up of silica and rich in iron and
magnesium.
52. Shield Volcanoes do not explode like --------------------------53 . ----------------------------------------are bigger than Strombolian,
these eruptions create ----------------------------------.
54. ------------------------------------------are uncommon and formed only
by what is called a Strombolian eruption.
55. When the tectonic plates move against each other causing an earthquake,
they leave cracks on the earth’s surface which are called ---------------------56. A fault may move -----------------------or -------------or both at the same time.
57. The types of Volcanic eruption are--------------------------,----------------------------,-----------------------------,--------------------------,-------------------58. Strato volcanoes are prone to --------------------- , --------------------- and -----------------------.
59. ----------------------is a vent in the Earth’s crust that releases some of the
following volcanic matter :lava ,ash, gases and pyroclastic flow.
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60.------------------------------eruption is very little or no lava comes out of it.
61.When an earthquake happens, the energy released from where
the earthquake originated ,The ripples of energy are called------------62.The lithosphere is the name of the place where
occurs on the surface of the earth.
-------------------
63.-----------------------------------------are the most common type of
volcano on Earth.
64.Strato volcano makes more gases causing the volcanic vents to ------------------------ ,which is why Strato Volcanoes have more ----------------------------------than others
65.The layers of the earth are----------------------------------------------66.-------------------------------is the least explosive volcanic eruption.
67-Hawaiian eruption is very similar to -------------------------------.
68- ----------------------------- is the point on the Earth's surface that is
directly above the focus (the point of origin) of an earthquake ,and
underneath is called --------------------------.
69-Compare between the desert ecosystem and the tropical rainforest
in terms of (location – climate – vegetation – wildlife)
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