Class 7th mid Term

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Class 7th mid Term

SUBJECT : SCIENCE Time : 1hr

NAME OF STUDENT

1. Multiple choice types question 1. Green plants are

1 point

a. Herbivores

b. Omnivores

c. Carnivores

d. Autotrophs

Clear selection

2. The gas produced during photosynthesis is

1 point

a. Oxygen

b. Carbon dioxide

c. Nitrogen

d. Carbon monoxide

Clear selection

3. The most effective light for photosynthesis is.

1 point

a. Blue + red

b. Blue + green

c. Green + yellow

d. Orange + red

Clear selection

4. The mode of nutrition shown by mistletoe is

1 point

a. Parasitic

b. Partial parasitic

c. Saprophytic

d. Symbiotic

Clear selection

5.Which of the following is not a physical?

1 point

a. Melting of wax

b. Tearing a piece of paper

c. Dissolution of salt in water

d. Digestion of food

Clear selection

6.Which of the following is a chemical change ?

1 point

a. Breaking of a brick

b. Evaporation of a liquid

c. Burning of a candle

d . none of these

Clear selection

7. Chemical changes are

1 point

a. Always irreversible

b. Always reversible

c. Mostly irreversible

d. Mostly reversible

Clear selection

8. During the dissolution of urea , heat

1 point

a. Is absored

b. Is evolved

c. Does not changes

d. None of these

Clear selection

9.Glucouse is oxidised to ethyl alcohol during the process of

1 point

a. Respiration

b. Aerobic respiration

c. Anaerobic respiration

d. Photosynthesis

Clear selection

10. The end - product of respiration is

1 point

a. Carbon dioxide

b. Water

c. Both carbon dioxide and water

d. None of these

Clear selection

11. Which of the following is not associated with the process of respiration?

1 point

a. Lungs

b. Alveoli

c. Bladder

d. Trachea

Clear selection

12. Which of the following respires only anaerobically ?

1 point

a. Cockroach

b. Yeast

c. Fungi

d. All bacteria

Clear selection

13. an electric circuit , current starts from the

1 point

a. Positive terminal

b. Negative terminal

c. Either of the two terminals

d. Depends upon the circuit

Clear selection

14. Heat produced in a resistor when current is passed through it depends upon

1 point

a. Current only

b. Current and time

c. Time only

d. None of these

Clear selection

15.effect of current on which the use of a fuse is based is

1 point

a. Magnetic effect

b. Chemical effect

c. Heating effect

d. Induction effect

Clear selection

16. Choose the statement which is not correct in the case of an electric fuse.

1 point

(a) Fuses are inserted in electric circuits of all buildings.

(b) There is a maximum limit on the current which can safely flow through the electric circuits.

(d) If a proper fuse is inserted in a circuit it will blow off if current exceeds the safe limit.

Clear selection

17. Pure water is

1 point

a. Colour less and opaque

b. Colour less and transparent

c. Coloured and transparent

d. Colour less , odourless and transparent

Clear selection

18. Which of the following is not a water pollutant ?

1 point

a. Metal nitrates

b. Sewage

c. Oxygen

d. Human excreta

Clear selection

19. Which component of the cooked food should not be disposed off into the drain?

1 point

a. Dry vegetables

b. Oil/ghee

c. Supernatent liquid

d. None of these

Clear selection

20. The aerobic bacteria can be grown in clarified water by

1 point

a. Filtration

b. Chlorination

c. Aeration

d. Sadimentation

Clear selection

21. Sunlight, chlorophyll, carbon dioxide, water and minerals are raw materials essential for photosynthesis. Do you know where they are available? Fill in the blanks with the appropriate rawmaterials.(a) Available in the plant : _______________(b) Available in the soil : _______________, _______________(c) Available in the air : _______________(d) Available during day : _______________

4 points

22.State whether the following statements are true or false:(a) When a candle burns, both physical and chemical changes take place.(b) Anaerobic bacteria digest animal waste and produce biogas.(c) Ships suffer a lot of damage though they are painted.(d) Stretching of rubber band is not a physical change.

4 points

23.Fill in the blanks with suitable words.(a) The roots of a plant take up oxygen from the ______trapped between the ________ particles.(b) Diaphragm forms the ___________ of the chest cavity.(c) Exchange of gases in the leaves take place with the help of __________.(d) Cockroaches breathe with the help of air tubes called___________. chose from the bracket { air, soil , floor , stomata , tracheae}

4 points

24.State whether the following statements are True or False. In case a statement is false, write the correct statement.(a) Sewage is a solid waste which causes water pollution and soil pollution.(b) Used water is wastewater.(c) Wastewater could be reused.(d) Where underground sewerage systems and refuse disposal systems are not available, the high cost on-site sanitation system can be adopted.

4 points

25.Fill in the blanks: {chemicals stored, battery , conductor ,safety device } (i) Our body is a ________________ of electricity.(ii) An electric cell produces electricity from the _____________________ in it.(iii) In an electric circuit a fuse is a _________ _______ toprevent possible fire.(iv) A combination of two or more cells is called a _________.

4 points

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