Lab: Motion In this experiment, the was intentionally manipulated. This was the independent variable
The dependent variable measured was the

height of the track
Speed of the car

this protocol provides a detailed procedure for co-immunoprecipitation (co-ip) to identify protein–protein interactions.

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.

the growth of the plants is affected by the heat of the light. what is the student doing?