Which words should Marina place in each blank of the flow chart? asthenosphere, ridge push, subduct
magma, slab pull, subduct
lithosphere, ridge pull, float
lithosphere, ridge push, subduct

the answer is a. at the equator

co2reflects heat radiation back to earth buning coal and oil emits co2 globe warms

measuring things 1 litre of water

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

                                              ⇒      

here   k is the proportionality constant whose value is 1.

                                                            [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.