High Order Thinking Skills (HOTs) - 4 - Class 9 MCQ

Fill in the blanks by selecting an appropriate option.

Every object in the universe attracts every other object with a force which is directly proportional to the product of their masses and (i) proportional to the (ii) of the distance between them. If an object of mass 1 kg is placed on the surface of the Earth, gravitational force of attraction between the object and the Earth is (iii) N. If two objects are of different masses and the distance between them is decreased by 10 %, then the percentage change in the gravitational force between the two objects is about (iv).

Figure shows the frictional force (F) versus displacement(s) graph for a particle in motion.
The loss of kinetic energy (work done against friction) in travelling over s₁ = 10 m to s₂ = 20 m will be

Read the given passage where few words are italiscised and select the correct statement regarding them.

The term cell was coined by Robert Hooke in 1665. Cells that lack a well defined nucleus and membrane bound organelles are called prokaryotic cells whereas cells that have a well defined nucleus and membrane bound organelles are called eukaryotic cells. Bacterial cells are prokaryotic cells whereas animal cells are eukaryotic cells.

The given figure is of a type of plant tissue. Identify it and select the incorrect statement regarding its function.

The following figure shows the changes in the three states of matter of a substance X.

Select the incorrect statements about these changes
I. Change 1 requires a decrease in temperature and an increase in pressure and is also called sublimation.
II. Change 3 can be carried out by decreasing pressure and increasing temperature.
III. Change 2 can be brought by heating the given substance.
IV. Change 4 can be carried out in the presence of heat.