Gr 6 Revision Sheet

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Gr 6 Revision Sheet Powered By Docstoc
					  Al Mawakeb School
                                                        Name: ______________
  (Barsha / Garhoud)
                                                        Grade: 6/ Section: ____
  2008-2009
                                                        Date: _______________
  Science /revision sheet

  Term 3

  Revision Sheet
A. Fill in the blanks using the words in the box.



      Producers - Food Chain – Decomposers – Scavengers

    Energy pyramid – Bacteria - Food web – Consumers - Sun

Ecology -niche-ecosystem-biotic part-habitat-abiotic- symbiosis

     Prey-predator-parasite-host-parasitism- commensalism-
                           mutualism-

      symbiosis-kinetic energy-higher-dense-faster-radiation




1. The _______________provides energy for almost every living organism in an
     ecosystem.
2. All life in an ecosystem depends on_______________ to capture this solar
     energy.
3. Other living organisms in a community must search for their food to eat, these
     organisms are called _______________
4. A _______________shows how organisms in an ecosystem are connected
     according to what they eat.
5. _______________such as fungi and_______________, break down the
     tissues of dead organisms.


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6. A _______________shows the relationships between many food chains
      within a single ecosystem.
7. A (an) _______________shows the amount of energy available to pass from
      one level of a food chain to the next.
8. The vulture is a _______________it feeds on the remains of dead animals.
9. _______________is the study of organisms and their environment.
10.    _______________is an organism’s way of life; it includes habitat, food,
       predators and organisms with which it competes.
11.    An_______________ is made up of _______________of organisms and
       its _______________factors.
12.    A _______________is the environment in which Organisms live.



13.    There are three types of ______________________ or association in
       which two organisms live together. One type, _______________ is
       beneficial to both organisms.
14.    _______________is when only one of the organism's benefits, but the
       other is not harmed, such as birds building nests on the tree.
15.    _______________is when one of the organisms is weakened by another
       organism called _______________The organism weakened is the
       _______________
16.    The_______________ is an animal that eats other animals that are
       called_______________.
17.    The faster the particles of an object are moving, the _______________the
       temperature of the object.
18.    In conduction, when faster-moving particles collide with slower-moving
       particles, the faster-moving particles give _______________energy to the
       slower-moving particles.
19.    In convection current, warmer particles move _______________because
       they are less _______________than cooler particles.
20.    You can feel the warmth of the portable heater when you are
       standing near it because of____________________.

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B. Choose the best answer:

1-which of the following ecosystems would be likely to have the greatest diversity?

  a- A high mountain meadow

  b- A desert valley

  c- A temperature deciduous forest

  d- A lake in the taiga

2-which is the source of energy in an ecosystem?

 a- Decomposers

 b- Nutrients in the soil

 c- Sunlight

 d- Water

3-which of these is an example of commensalism?

 a-you catch a fish and eat it.

 b- A mosquito bites you.

 c- you pick and eat a peach from a tree.

 e- A virus gives you the flu

4- Why do organisms compete within ecosystems?

 a- There are limited resources

 b- They occupy different niches

 c- They want to increase diversity

 d- Humans cause them to compete




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               Paper – Iron- Wood- Chair- Gold - Plastic-

                          Copper- Water – Silicon



 C. Categorize the above materials as insulators or conductors

       Insulators                           Conductors




a-                                     a-

b-                                     b-

c-                                     c-

d-                                     d-




 D. Arrange the following Parts of an Ecosystem, each in its right column.

     Trees - Cord grass – Rain – Sunlight – Worms – Soil - Temperature


                 Biotic                             Abiotic




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E. Answer the following questions:

1-What determines an object’s thermal energy?

________________________________________________________________
________________________________________________________________
________________________________________________________________

2- What is the direction of flow of the current?

___________________________________________________________________

___________________________________________________________________

3- Electricity is produced from other sources of energy. List three of them.
   a.
   ______________________________________________________________

   b.
    ________________________________________________________
   c.
   ______________________________________________________________



4- What are the parts that make up this machine?
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________




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6-Match the circuit to its description by choosing the correct letter(s) from the given
choices of the diagrams:



   a.   Batteries in series
   b.   Switches in parallel
   c.   Resistors in parallel
   d.   Switches in series




7- Place these organisms in their specific location in an Energy Pyramid

   Coyote - Green plant – Vulture – Mushroom – Rabbit




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8- Distinguish between an organism's habitat and its niche using the owl and
hawks as an example. Can these two organisms live together?


___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________

9-- How are a population and a community of crocodiles related in an
ecosystem?


________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________


10- What are the two main factors that determine Ecosystem Diversity?
A._______________________________________________________________

B._______________________________________________________________

11- How can human activities make the population less diverse?
________________________________________________________________
________________________________________________________________
________________________________________________________________
_______________________________________________________________




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