You have just explored the scientific method. now test your understanding.

which of the following best describes a manipulated variable?
a.

it is the variable in a controlled experiment that is changed in the course of the experiment.
b.

it is the variable in a controlled experiment that remains constant throughout the experiment.
c.

it is the variable in a controlled experiment that is measured as a result of the experiment.

Imagine that a new planet is discovered with two moons of equal mass: moon a and moon b. the mass of the new planet is greater than the combined mass of its moons. moon a is farther away from the new planet than moon b. what is the planet's gravitational pull on moon a compared to the planet's gravitational pull on moon b? the planet's gravity repels moon a with a greater force than it repels moon b, which is why moon a is farther away. the gravitational pull on moon b is greater than on moon a because moon b is closer to the new planet than moon a. the gravitational pull on moon b is greater than on moon a because moon b is farther away from the new planet than moon a. the gravitational pull on moon a is the same as the gravitational pull on moon b because distance does not affect the planet's gravity.