Question

3.Instruments measures time most accurately (Motion and time) *
1 point
a)Sundial
b)Quartz watch
c)Pendulum clock
d)Watch with balance wheel
4.If u heat a liquid , it will ultimately change into (Structure of matter) *
1 point
a)solid
b)liquid
c)either a solid or a gas depending on temperature.
d)neither solid nor gas – it will always remain a liquid.

This is a required question
Q.1-B. VERY SHORT ANSWERS
3*1=3Marks
1.In a mechanical wristwatch , which part works in the same way as a pendulum in a clock?(Motion and time) *
1 point
2.If two compound that do not react chemically are mixed , what do we get ?(Structure of matter) *
1 point
3.Which bacteria in the soil can convert atmospheric nitrogen into soluble compound? (Nutrition in plants) *
1 point
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Answer 1

Answer:

Supplementary angles add to 180 degrees. So of the measure of the angle is x, the measure of its supplement is 2x. Angle = 60, supplement = 120.

Answer 2

Answer:

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