Model Paper 6 Science - Model Paper 6

The poultry birds groomed for obtaining meat are called _________.

Which one of the following will form a translucent solution in water?

Which of the following are physical changes?
i. Melting of iron metal
ii. Rusting of iron
iii. Bending of an iron rod
iv. Drawing a wire of iron metal

Amoeba acquires its food through:

Choose the chemical compound with which the specimen is temporarily mounted.

Assertion (A): Isobars are identical in chemical properties.
Reason (R): Isobars have same atomic number.

Assertion (A): Vascular or conductive tissue is a distinctive feature of complex plants.
Reason (R): Vascular tissue has made survival of complex plants possible in the terrestrial environments.

Assertion (A): During evaporation of liquids, the temperature remains unaffected.
Reason (R): Kinetic energy of the molecules is directly proportional to absolute temperature.

Assertion (A): The speed of the car is constant, its velocity is not constant because the direction of the car is changing continuously.
Reason (R): The direction of velocity is the same as the direction of displacement of the body.

Explain why chlorine, whether as the element or its compounds, always has a relative atomic mass of about 35.5.

A javelin throw is marked foul if an athlete crosses over the line marked for throw. Explain why the athletes often fall to stop themselves before the line.

Describe balanced forces with the help of two examples.

Why are gases highly compressible?

When a sound is reflected from a distant object, an echo is produced. Let the distance between the reflecting surface and the source of sound production remains the same. Do you hear echo sound on a hotter day?

Write a note on the protective tissue in plants. (Give appropriate diagram also).

Differentiate between rough and smooth endoplasmic reticulum. How is the endoplasmic reticulum important for membrane biogenesis?

Differentiate between hypertonic and hypotonic solution.

i. Under which category of mixtures will you classify alloys and why?
ii. Whether a solution is always liquid or not. Comment.
iii. Can a solution be heterogeneous?

Write a note on Golgi apparatus and the functions it performs.

What is membrane biogenesis? How is plasma membrane formed during this process?

Derive an expression for the force of attraction between two bodies and then define gravitational constant.

Read the following text carefully and answer the questions that follow:
A farmer has grown wheat on his field consecutively two times but when the third time he grows wheat on the same field the quality of the wheat was not up to the desired level. To improve the quality of his crops he uses chemical fertilizer but the condition of the crop became worse. One of his friends told him to grow a different variety of crops after wheat so as to grow two or three crops in a year with good harvests and use biological manure in place of chemical fertilizers which he prepares by animal excreta and plant waste to get the good quality of crops. He also told him about the good storage of his grains to protect them from the biotic and abiotic losses as in agriculture storage losses are very high.
i. What are the bases on which the next crop is decided to grow in the same field also name the process?
ii. What is the advantage of using biological manure over chemical fertilizers?
iii. Is it possible for the farmer to grow two crops at the same time if yes what is the requirement?
OR
Enlist the biotic and abiotic losses?