When pouring food coloring into warm water and cold water, we can see that the molecules in warm water move faster and spread the food coloring more quickly.
(Conduction Lab Experiment)
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true!!

Explanation:

the faster molecules move, the warmer the object is. think of how much energy you feel when you touch hot water and you whip your hand back, thats similar to how the molecules are movin, all that heat is energy built up in them and theyre moving around all crazy haha. Then think of putting ice in the freezer, all the molecules are kinda frozen in place, all squished together, because they dont have enough energy to move around. so, when the hot molecules with all that energy are moving around, the food coloring is able to get all over in the water. Kind of like if youre on a road trip the faster you drive the faster you'll get places. if you drive super slow, then it'll take forever to get there. so true, when food coloring is dropped into faster hotter molecules, it will spread faster. :)

cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms