Which one of the following best describes the features on the surface of the Moon?

Arti noticed the following precautions related to prevention of spread of a disease on a poster.

I. Do not let water collect around you.

II. Keep water pots, coolers and tanks clean.

III. Spray oil If water has collected at some place.

IV. Use nets to protect yourself.

The poster is aimed at creating awareness about the spread of :

While teaching how different food items can be kept fresh for some time, Radha enumerated the following techniques to her class:

I. Put it in a bowl and keep the bowl in an open container having cold water

II. Wrap it in a damp cloth

III. Spread it open in sunshine

IV. Cut it into small pieces and keep it in the dark

Which one of the following food items is she referring to, corresponding to technique II above?

While teaching the topic of 'Air Is everywhere', a teacher asks the following questions to students:

I. Is there air in the soil?

II. Is there air inside water?

III. Is there air inside our body?

IV. Is there air inside our bones?

Which one of the following skills is the teacher trying to develop in the learners?