Drag each tile to the correct box.

Put the stages of fossil fuel formation in their correct order.

^ Natural gas is forced into crevices or
sedimentary rock pores

^ Oxygen is used up or expelled.

^ Amount of heat dictates physical state of
fuel

^ Material is buried in sediment and silt

^ Heat and pressure are applied.

^ Organic material decomposes.

NEEDS TO GO FROM UP DOWN

Researchers randomly divide participants into groups. each group takes a different amount of omega-3 fatty acid supplements daily for a month. one group receives a placebo. the researchers measure the impact on cholesterol levels in the blood. what is the purpose of random assignment in this experiment? a, to produce treatment groups with similar characteristics b, to ensure that all people with high cholesterol have an equal chance of being selected for the study c, to increase the accuracy of the research results and prevent skewness in the data

In what for do plants utilize nitrogen? why do they need nitrogen?

Suppose you use three different scale to weigh a bag of oranges. one scale says the nag weighs 2.1 lb, and third says it weighs 2.1 lb. the actual weight of the bag of oranges is 2.153 lb. which of the following best decribes these results?