Question
Explain what you understand by sexual reproduction.
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Answer
Sexual reproduction is a process which involves production of seeds. It requires two parents. Most plants reproduce sexually with the help of flowers. The main function of a flower is to reproduce and therefore develop new seeds that can grow into new plants.
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(a) Using a mirror to project the image
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During a school science event, students watched a solar eclipse. Some used solar viewing goggles, some projected the image on a wall using a mirror, and one student tried looking directly at the eclipse.
Q.1. Which method of solar eclipse viewing is unsafe?
(a) Using a mirror to project the image
(b) Using solar eclipse glasses
(c) Watching a live stream online
(d) Looking at the eclipse directly with the naked eye
Q.2. Why does the Sun temporarily disappear during a total solar eclipse?
(a) The Earth comes between the Sun and the Moon
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(b) Moon - Sun - Earth
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→Riya observes that in her village, people place hay on roofs during summer.
Q.1. Why is hay used?
(a) It looks nice
(b) It reflects heat
(c) It acts as an insulator
(d) It traps water
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(a) Good conduction$\quad$(b) Radiant properties
(c) Air trapping ability$\quad$(d) High reflectivity
Q.3. Which method of heat transfer is being reduced here?
(a) Radiation$\quad$(b) Conduction
(c) Convection$\quad$(d) Absorption
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