Question

Q6 Sea breeze is caused due to *

conduction

convection

radiation

all of these

Q7 The basic unit of speed is *

Km/min

m/min

Km/h

m/s

Q8 Which of the following instrument measures time with the most accuracy? *

sun dial

sand clock

quartz clock

mechanical clock with gear


Q9 The metallic ball in a pendulum is called as *

gong

fork

rod

bob

Q10 The meter that is used to measure the distance moved by the vehicle is known as *

speedometer

odometer

chronometer

ammeter

Q11 Iodine used to detect presence of starch. It gives starch *

red colour

green color

blue-black colour

colorless appearance

Q12 Green plants are *

herbivores

autotrophs

hetrotrophs

omnivores


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Answer 1

Answer:

1st Q answer all of the above

2nd is. m/s

3rd is Quatarg clock

4th is Bob

5th is odo meter

6th is Blue black colour

7th is autotrophs

Answer 2

ANSWER:

1) Sea breeze is caused due to

i) conduction

ii) convection

iii) radiation

iv) all of these

→ Convection causes land and sea breezes to occur.

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2) The basic unit of speed is

i) Km/min

ii) m/min

iii) Km/h

iv) m/s

→ Speed is defined as the rate of change of distance with time. The SI unit of Distance is meter and SI unit of time is second. Therefore, SI unit of Speed is the combination of meter and second i.e meter per second (m/s).

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3) Which of the following instrument measures time with the most accuracy?

i) sun dial

ii) sand clock

iii) quartz clock

iv) mechanical clock with gear

→ Quartz clock. It is because the sundial depends on the sun and maybe a little slow or fast. But the quartz clock is accurate.

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4) The metallic ball in a pendulum is called as

i) gong

ii) fork

iii) rod

iv) bob

→ Metallic ball in a pendulum is called as Bob.

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5) The meter that is used to measure the distance moved by the vehicle is known as

i) speedometer

ii) odometer

iii) chronometer

iv) ammeter

→ Odometer is an instrument used in the vehicle to measure the distance cover by it.

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6) Iodine used to detect presence of starch. It gives starch

i) red colour

ii) green color

iii) blue-black colour

iv) colorless appearance

→ Starch is the storage food reserve of a plant which is mainly present within the leaf. When we test it in the presence of Iodine, it forms a blue- black color complex of starch Iodide.

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7) Green plants are

i) herbivores

ii) autotrophs

iii) hetrotrophs

iv) omnivores

→ Green plants are autotrophs because they make their own food.