Drag the tiles to the correct boxes to complete the pairs. not all tiles will be used. match each si unit to the quantity it measures.

SI units or International System of Units is defined as basic set of measurement of seven units. The physical quantities and base units are as follows:

Length is measured in meter (m), mass in kilogram (kg), time in second (s), electric current in ampere (A), temperature in Kelvin (K),  luminous intensity in candela (cd) and amount of substance in mole (mol).

Therefore, SI units of physical quantities is known as base units and other units are known as derived units because they can derived from the SI units.

Thus, the correct match will be:

From the rest of the units, degree Fahrenheit is derived unit for temperature, gram is derived unit for mass, nanosecond is derived unit for time and candela is SI unit for luminous intensity.

i think it is true since you can test the answer and can use observations to complete it.

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-