علوم متكامله G10

1-    Which of the following organisms gain the energy from the sun directly?

• Grasshoppers ( locusts)

• plants

• the mouse

• the snake

Which of the following systems allows the exchange of matter and energy with its surroundings

• Closed system

• solated system

• Open system

• None of the above

1- If we suppose that

- (X) organisms produce energy for other living organisms

- (Y) organisms gain energy from other living organisms

So X & Y are respectively………….

• a) Algae – phytoplankton’s

• Algae – shark

• Shark – whales

• Grass – saprophytic fungus

1- Which of the following is an extensive property of a system?

• Temperature

• Mass

• Density

• Pressure

1- The opposite diagram shows an aquatic food chain and each figure A,B,C,D,E represents a different trophic level , which of these levels is found in the base of the food pyramid?

• A

• B

• C

• E

1- Which of the following is an example of a closed system?

• Thermos

• A tightly sealed flask containing a chemical reaction

• An open kettle

• An open pot

1- If the amount of energy in the third trophic level is 10cal , the amount of it in first and fourth trophic level respectively is …..

• a) 1000 cal – 10 cal

• a) 1000 cal – 100 cal

• a) 100 cal – 1 cal

• 1000 cal – 1 cal

1- The energy increases in organism X in aquatic system than the energy of organism Y by ……….. times

• 100

• 1000

• 20

• 30

Which of the following statements describes the reason of decrease the levels of energy in energy pyramid

• a) Increase the quality of energy transfer by moving towards the top of the pyramid

• a) Loss of energy in each trophic level by 90%

• Increasing the numbers of predators than producers

• a) The remain energy increases after each level

explains the role of the microorganisms which present in the fish tank?

• a) The microorganisms recycle the nutrients

  to support the ecosystem

• a) They Work on increasing the organic wastes

  in the tank

• They are the source of food to the plant

• a) They are a non-living factor for decomposition