Which statements about fresh water and salt water are true? check all that apply.

a pond is a source of salt water.
fresh water is essential to all life on earth.
half of earth’s water is fresh water.
most of earth’s water is stored in the oceans.
oceans are the largest source of fresh water.

answers are b and d
fresh water is essential to all life on earth.
most of earth’s water is stored in the oceans.

Aregion of space in which a measurable gravitational force is indicated by the force exerted on a test mass is called

Ineed asap! list 3 examples in which friction us or makes things easier in our daily life. explain the effect of friction for each. *make sure you explain the effect of friction for each example! *

Astudent is performing an experiment comparing sound and light waves. the student gathers the following data. what conclusion does the student most likely make based on this data? light waves always travel the same speed; however, the speed of sound is determined by the medium that it travels through. all sound waves always have the same energy, so the temperature of the medium does not affect wave speed. light needs to vibrate particles, so it travels fastest in tightly packed solids, while sound does not need a medium, so it travels fastest in a gas. tightly packed particles in solids slow down the light waves; however, sound waves make particles bounce into each other, so they travel faster in solids.