Weather Soil Water and Environment (Class 7)

What this worksheet covers

This is an eighteen-question practice worksheet on weather, soil, water and our environment for Class 7, written to the pattern of the SOF National Science Olympiad (NSO). It carries 24 marks and is designed to be attempted in 45 minutes, split across three sections — Scientific Reasoning, Applying What You Know and Achievers Section. Every question is multiple choice with exactly one correct option, and every one comes with a fully worked solution rather than just an answer key — so a child who gets one wrong can see where the reasoning went astray instead of only learning that it did.

Skills your child practises

• Applied problem-solving on weather, soil, water and our environment at Class 7 level
• Working accurately against a time limit, as the real paper demands
• Scientific Reasoning questions in the olympiad format
• Applying What You Know questions in the olympiad format
• Achievers Section questions in the olympiad format
• Reading worked solutions to find the step that went wrong

How to use it

1. 1There are 18 questions in this worksheet. All questions are compulsory.
2. 2Each question has four options (A), (B), (C) and (D). Exactly one option is correct.
3. 3Questions 1–15 carry 1 mark each. Questions 16–18 (Achievers Section) carry 3 marks each.
4. 4There is no negative marking. Study every diagram and table carefully.

Sample questions from this worksheet

A preview of what's inside Weather Soil Water and Environment (Class 7) — the PDF has the full set, and every question comes with a worked solution like these.

1. 1. The day-to-day condition of the atmosphere at a place is called its _______.

   • AClimate
   • BSeason
   • CWeathercorrect
   • DHabitat
   Solution: Weather is the day-to-day state of the atmosphere and can change within hours. Climate is the average weather pattern of a place taken over many years.

2. 2. Why does the maximum temperature of the day usually occur in the afternoon rather than at noon, when the sun is highest?

   • AThe ground keeps absorbing more heat than it loses for some hours after nooncorrect
   • BThe sun is closer in the afternoon
   • CThe air becomes thinner
   • DClouds form at noon
   Solution: The sun is strongest at noon, but the ground goes on gaining heat faster than it loses it for a couple of hours afterwards. Only when the two rates balance does the temperature peak, which is why the hottest time is mid-afternoon.

3. 3. Consider the following statements.(i) Weather and climate mean the same thing.(ii) Humus makes soil fertile.(iii) Only a small fraction of the earth's water is fresh water available for use.Which of the statements is/are correct?

   • A(i) and (ii) only
   • B(ii) and (iii) onlycorrect
   • C(i) and (iii) only
   • DAll three
   Solution: Statement (i) is false — weather changes from day to day, while climate is the average pattern over many years. Statement (ii) is true; humus supplies nutrients and helps the soil hold water. Statement (iii) is true; about 97% of the earth's water is salty and most of the rest is frozen. Hence (ii) and (iii).