1.the movement of particles from a less crowded area to a more crowded area requires

a. sunlight
b. energy
c. a membrane
d. osmosis

2. what structures allow small particles to cross cell membrane

What happens to the average kinetic energy of a gas when the particles of the gas collide against each other at a constant temperature and volume? explain your answer.

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false

Alice did an experiment to find the relationship between the angle at which a ray of light strikes a mirror and the angle at which the mirror reflects the light. she placed a ray box in front of a mirror. she changed the angle at which the light from the ray box struck the mirror and noted the corresponding angle at which the mirror reflected the light. which of the following is the dependent variable in this experiment? the mirror used to reflect the light the ray box used as the source of light angle at which the light from the ray box strikes the mirror angle at which the mirror reflects the light from the ray box