WRITTEN WORK
Note Student will do the work neatly in Alhed Schools Notebook
1.On chilly days when we breathe out on a glass or a window, the glass steams up.
SCIENCE
do you think this happens? Consult Unit 8 of Science Factez"
2. What is meant by the terms magnetism and electromagnetion State the application
electromagnetism from your daily life,
3.State the law of reflection and make a comparison between concave lenses and
convex lenses. You can go through Unit no.no Science fact file 2".
4.State any four distinguishing features between acids and alkalis.
5. What is the wavelength of a sound with a frequency of 330Hz? Take the speed of
sound in air to be 330 m/s.
Hint: speed frequency x wavelength
6.Sketch a concept map of classification of animal kingdom. Refer to the internet or
Unit
of science fact file 2.
7. We can make secondary colors by mixing primary colors (i.e. red, blue and green)
in different proportions. On your notebook mix up different water colors to make
yellow, orange and magenta color. Which two colors are being mixed to form these
Answers
Answer:
1. It is because of a process called evaporation occuring on the top of the glass.
2. Magnetism is the attraction of magnetic field lines towards North Pole/South Pole. Electromagnetion is the process by which an electric field is generated by a magnetic field or magnetism.
3. According to law of reflection, angle of incident is always to angle of relection. It says ray comes from a glass will bend towards the normal/
4. Acids are the things that turn red litmus blue and bases are the things that turn blue litmus red. Their pH values lies between 0 and 7.
5. The wavelength would be x = cy/Lemda and answer would be 120
6. Animal kingdom is divided on the bases of their specifices if they contain very large species, they are at the top of the graph and other are declared as valuable consumers.
7. Using magenta and yellow, we can make a specific color required in most of the daily life activities.
Explanation: