Page 117 - SCERT Kerala State Syllabus 8th Standard Basic Science Textbooks English Medium Part 1_Neat

Let us assess

1. Write down the following units in the ascending order of their
values
a) mm nm cm m
b) 1 m 1 cm 1 km 1 mm
2. Which of the following units does not belong to the group?
a) kg mg g mm
b) m mm km mg

3. Imagine that the distance from school to your friend's house
is 2250 m. State this in kilometres.
4. Convert the following units into SI units without changing
their values.
a) 3500 g b) 2.5 km c) 2 h

Extended activities

1. Find out the units used in earlier days to measure length and
compare them with metre.

2. Enquire and collect details about former systems of units like
CGS, MKS, FPS and find out their relationships with the
fundamental SI units.
3. Collect pictures of the instruments used by our ancestors to
determine time like sundial. Prepare their charts and exhibit
them in class.

116 Basic Science VIII