Investigating a fire scene, you determine several places where fires started. What might you guess about the cause of the fire?

A. It was an electrical fire

B. It was deliberately set

C. An accelerant was used

D. It was an accident

Which type of rock (metamorphic, sedimentary, igneous) can you find fossils in?

word equations for the combustion of wood, natural gas (methane) and ethanol

The introduction of a reflective essay should begin with a. a lead-in sentence. b. a thoughtful question. c. a thesis statement. d. an acknowledgement of the audience.

What happens to the entropy when a solution is made

The compound NacI is an example of a/an

Suppose the average concentration of copper in water is measured to be 2.5 x 10" M. a. Express this concentration in mg/L. b. Express this concentration in ug/L. c.

If I add water to oil what will happen

Commercial fertilizers, which are made by humans, are used to enrich soil for healthier crops. However, erosion may carry the fertilizer chemicals to the oceans. The presence of these chemicals may cause certain kinds of algae to reproduce rapidly.

A cube of iron has a temperature of 35°C. It is placed on top of a hot surface with a temperature of 175°C. What will happen to the iron? A) Its temperature will decrease. B) Heat will flow from the hot surface into the iron.

Density differences cause the