Download rev-sheet-answered-English Social

Social studies : Grade 6
2nd quarter
Model answer of the Revision sheet
I. Complete the following sentences:
1. AN ECOSYSTEM 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 A FOOD CHAIN
3. THE FOREST FLOOR 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; DEER which are called
HERBIVORES -,but meat eating animals like LIONS are calledCARNIVORES
5. Some ecosystems have dry and warm climate like DESERT
ECOSYSTEM ,while others have a wet and humid climate like TROPICAL
RAINFOREST
6. The soil in the desert does not contain enough MINERALS and
NUTERIENTS for vegetation to grow.
7. CACTUS is the most common type of desert plant, because IT
SURVIVES BY HOLDING WATER INSIDE IT FOR LONG PRIOD OF TIME.
8. Dead plants and leaves decay quickly in FOREST FLOOR -layer with the
help of decomposers such as; earth worms.
9. The rainforest are divided into four layers-FLOREST FLOOR,UNDERSTORY-,-CANOPY-,and-EMERGENT.
10.The desert landscape is HARSH AND DRY with little naturally
growing GRASS.
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11. The largest rainforest is THE AMAZON RAINFOREST IN BRAZIL.
12. The tropical climate, during-WET SEASON-,it’s common to rain
heavily on a daily basis , As for the-DRY SEASON, rainfall does not stop
completely but not as heavy as the wet season.
13. --RAINFORESTS-are called “the lungs of the world” because THEIR
PLANTS AND TREES PRODUCE OXYGEN ,PEOPLE AND ANIMALS NEED
OXYGEN TO BREATHE,
14. Vegetation in the rainforest is layered into levels of height, which
are- FLOREST FLOOR,-UNDERSTORY-,-CANOPY-,and-EMERGENT.
15. A food chain starts with the SUN
16. All the plants and shrubs that grow in –FOREST FLOOR-layer have
adapted to catch a few sun light.
17. ANACONDAS , SCORPIONS , TURTLES AND CROCODILES are animals
that live on the forest floor.
18. Seasons do not change in tropical rainforest , the only element that
change is-THE AMOUNT OF RAIN
19. It is common to grow plants that live in UNDERSTORY layer inside
your home as houseplants ,because they do not need a lot of sunlight to
survive.
20. –A CHICLE -is a substance that is used to make gum.
21. –CANOPY layer is the busiest part of the rainforest , because—A
LOT OF ANIMALS ,BIRDS AND INSECTS LIVE UP THERE22. –COCKATOO , TOUCAN , SLOTH AND WOOLLEY MONKEY are
animals that live in the canopy layer.
23. –EMERGENT is the highest layer in the rainforest.
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24. –EAGLES AND PARROTS--are the animals that live in the emergent
layer.
25. When people of the rainforest moves to big city, they suffer from
-CULTURE SHOCK
26. The uses of the rainforest are---FOOD AND DRINK - MEDICAL
BENEFITS – LUNGS OF THE WORLD – PROTECT SOIL FROM EROSION –
BALANCES THE TEMPREATURE AROUND THE WORLD
27. The rainforests of the world are in danger, because ofDEFORESTATION
28. Deforestation negatively affects the rainforest in many ways such as;
A THREAT TO WILD LIFE: CAUSES A LOT OF ANIMALS AND BIRDS TO LOSE
THEIR SHELTER AND FOOD.
A THREAT TO INDIGENOUS TRIBES:THIS CAN LEAD TO POVERTY AND LOSS
OF LOCAL CULTURE AND TRADITIONS.
A THREAT TO NATURE AND CLIMATE: DESERTIFICATION – FLOOD –
GLOBAL WARMING.
29. Animals that live in understory layers are—BUTTERFLIES – FROGS SNAKES
31. –RECYCLE SYSTEM--is a very effective method of help preserving our
rainforests.
32. -RAINFORESTS---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 –DIABETES , RHEUMATISM , and
INFLAMMATION
34. Deforestation is-CUTTING TREES AND PLANTS.
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35. ---EMERFENT layer catches the most sunlight, and exposed to the wind ,so
that emergent trees have-THICK—and WAXY -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;REPTILE SKIN , TORTOISE
SHELLS , AND IVORY37. Deserts are mainly concentrated in-MIDDLE EAST-and-AFRICA
38. The most famous deserts are SAHARA AND ARABIAN
39. Scientists use an instrument called –SEISMOGRAPH to measure the size of
the earthquake and how powerful it was.
40 .TROPICAL RAINFOREST is one of the richest ecosystems, because it’s
estimated that-MORE THAN HALF OF THE WORLD’S PLANTS ,ANIMALS AND
INSECTS LIVE IN TROPICAL RAINFOREST.
41.Desert climate is usually DRY during the day, but when the sun
goes down it can get COLD AND WINDY
42. -BIOMES-are the ways to show the location of the different
ecosystems on a map using color-coded zones.
43. RAINFORESTS-are located around the equator in part of SOUTH
AMERICA , AFRICA , ASIA AND AUSTRALIA.
44. –CAMELS are considered to be the most well-known animal of
the desert, because THEY CAN COPE WITH THE HEAT BECAUSE
THEY DON’T SWEAT MUCH,SO THEY DON’T NEED LOTS OF WATER
TO SURVIVE.
45. STRATO VOLCANOES are made up of half lava and half
pyroclastic material.
46. Camels are used as form of transportation for BEDOUIN TRIBES
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47. Tourists who visit the desert should be well prepared for the
excessive heat and dehydration by-USE SUN PROTECTION CREAM ,
DRINK PLENTY OF WATER ,WEAR LOOSE AND LIGHT COLORING
CLOTHES AND HAS AS WELL.
48. --THE TECTONIC PLATES -are constantly shifting , but
when the plates move against each other , they can build up TENSION and PRESSURE-, which cause earthquakes .
49. SHIELD VOLCANOES: -are the largest volcanoes in the world.
50. THE LITHOSPHERE which consists of the crust and the
upper mantle , is where the earth’s tectonic plates are found.
51. SHIELD VOLCANOES -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 STRATO VOLCANOES
53 . - VULCANIAN ERUPTIONS -are bigger than Strombolian,
these eruptions create STRATO VOLCANOES.
54. CINDER CONES 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 FAULTS
56. A fault may move –HORIZONTALLY AND VERTICALLY or both at the same
time.
57. The types of Volcanic eruption are AN ICELANDIC ,HAWAIIAN
ERUPTION ,STROMBOLIAN ,VULCANIAN ERUPTIONS,AND PELEAN
ERUPTIONS.
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58. Strato volcanoes are prone to MUDSLIDES , LANDSLIDES AND AVALANCHES
59. VOLCANO is a vent in the Earth’s crust that releases some of the
following volcanic matter :lava ,ash, gases and pyroclastic flow.
60.- STROMBOLIAN 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
SEISMIC WAVES.
62.The lithosphere is the name of the place where EARTHQUAKES
occurs on the surface of the earth.
63. STRATO VOLCANOES are the most common type of volcano on
Earth.
64.Strato volcano makes more gases causing the volcanic vents to
GET BLOCKED ,which is why Strato Volcanoes have more EXPLOSIVE
eruptions than others.
65.The layers of the earth are- CRUST , MANTLE , INNER CORE
AND OUTER CORE
66.- AN ICELANDIC ERUPTION -is the least explosive volcanic
eruption.
67-Hawaiian eruption is very similar to - ICELANDIC ERUPTIONS
68- EPICENTER 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 -HYPOCENTER
69-Compare between the desert ecosystem and the tropical rainforest
in terms of (location – climate – vegetation – wildlife)
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RAINFORST ECOSYSTEM
DESERT ECOSYSTEM
LOCATION:AROUND THE WORLD ,,IN PART OF SOUTH
AMERICA,AFRICA,ASIA AND AUSTRALIA.
THE MIDDLE EAST AND AFRICA
CLIMATE: RAINY HEAVILY ALL YEAR-TEMPERATURE IS
CONSANT………….. THE TROPICAL CLIMATE, DURING WET
SEASON-,IT’S COMMON TO RAIN HEAVILY ON A DAILY
BASIS , AS FOR THE DRY SEASON, RAINFALL DOES NOT
STOP COMPLETELY BUT NOT AS HEAVY AS THE WET
SEASON.
DRY DURING THE DAY ,BUT COLD AND WINDY WHEN
THE SUN GOES DOWN.
VEGETATION:IT HAS HALF OF THE WORLD’S PLANTS AND
TREES (OAK TREES)-VEGETATION ACTS AS A HUGE
SPONGE TO ABSORD THE RAIN WAITER – THEY
CONSIDERED LUNGS OF THE WORLD
DRY WITH LITTLE NATURALLY GROWING GRASS.
(CACTUS)
WILD LIFE:FROGS,BUTTERFLIES – SNAKES-EAGLES-SLOTHWOOLLY MONEY –TOUCAN……………………..SO ON.
CAMELS- LIZARDS-ARACHNIDS
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