A student creates a model of the formation of fossil fuels by first placing a layer of leaves, representing organic matter, in the bottom of a cup. What step will come next in the model?
Pouring water over the leaves to model washing away by rivers
Adding sand on top of the leaves to model burial in sediments
Burning the leaves to model the decay of the organic matter
Putting the leaves in the freezer to model conditions on top of mountains

Aresearcher designed an investigation to test what effect eating different types of food would have on blood insulin levels. she selected 10 male subjects who were all 25 years of age and in good health. the experiment took place over 3 days. at 8: 00 a. m. on each day, the subjects ate a meal consisting of only 1 type of food. they had their blood insulin levels measured after consuming the meal. on day 1 they ate a high fat diet, on day 2 they ate a high protein diet, and on day 3 they ate a high sugar diel what is the independent variable in this experiment? a the age of the subjects b the blood insulin level c the type of food consumed d the time of day the meal was consumed

Which best describes carbon dioxide’s path out of the body

In which squares should the phrase "green pods" appear a) a and d b) b and e c)a, c, and d d)a, b,c, d and e