Weather, Climate and Adaptations of Animals of Climate — Science STD 7 — Question

Explain the importance of understanding the properties of different materials, and how does this helps in everyday life?

One day, a five years old boy, Chintoo was playing with his toys in his room. After few minutes, he saw a wristwatch on his study table, so after seeing it, he got crazy and so much eager to play with that watch. Then, for 2 to 3 min, he was trying to analyse it that whether its a toy or something else, then suddenly, he was just about to throw it but at the same his mother entered into the room and took the watch back immediately from his hand.
(i) State the benefits of a wristwatch.
(ii) Briefly mention the values showed by Chintoo's mother here.

People say that nothing goes waste in a forest. Can you explain how?

Give the difference between weather and climate.

Deforestation can be considered as a reason for depletion of the water table. Comment.

Explain the difference between self-pollination and cross - pollination.

Observe the following figure and answer the following Questions.

1. Which is the heaviest rock material?
2. Which is the lightest soil component?
3. Why different layers of soil component are formed?

Draw a diagram of (a) wall clock (b) table clock (c) digital clock. On what principle do all clocks work?

The sun plays a major role in the change of weather. How can you explain it?