sound waves are transferred by the compression of particles. the closer the particles are to one another, the faster the energy is transferred. therefore, sound energy directly depends upon the of the medium.
a) density
eliminate
b) mass
c) pressure
d) volume

Graphs you see question 5 options: the change in data over time the relationship between different dependent variables the relationship between the independent variable and the dependent variable/s the relationship between different independent variables

Which statement is the best summary of the model? a-a series of aerobic and anaerobic reactions take place in cells b- the sun's energy moves through trophic levels in a food chain c-light energy is converted into stored chemical energy plants.d- food molecules are broken down in the cells if living things.

Which substance contains thylakoids? a) nadph b)atp c)stroma d)chloroplast