Blank! An organism whose presence or absence reveals the environmental condition?

Which of the following are examples of plasmas? Answers are numbered *ice cubes 1) * tails of comets *a gas fire 2) * the ionosphere 3) * a neon sign *a flashlight

When bases dissolve in water they release what type of negative ion?

What is the molarity of a sodium chloride solution that contains 0.19 moles dissolved in a 0.94 liter solution

What is the volume of liquid in a round bottom flask of 11.0cm, to the nearest 0.001L.

What is the total displacement of the car after 5 h? A. 40km B. 15km C. 0km D. 20km

If an atom has 8 valence electrons, how many electrons does it need to gain to achieve a stable electron configuration?

About how many miles on Earth are equal to one degree of latitude?

What are the allotropes of sulphur And phosphorus?

Particles are measured in

Marcus measured the masses and volumes of samples of four different substances, and he calculated their densities. The table shows Marcus's measured and calculated values. Substance Mass (g) Volume (cm3) Density (g/cm3) aluminum 5.7 2.1 2.