What hypothesis states that the continents were once joined to form a single supercontinent? A. continental drift B. paleomagnetism C. plate tectonics D. sea-floor spreading

The periodic table is an arrangment of the chemical elements, ordered by atomic number, into families, and by doing so illustrates the periodic properties of the elements.

Which characteristic of life is demonstrated when oak trees make many acorns that can become new oak trees?

In an experiment forest, a sample of leaves is weighed over a one year period and is found to lose 83% of its mass. assuming first order kinectics, what is the rate constant for their decomposition

List 2 salts that would NOT be neutral and show/explain why.

What's the ratio in the compound iron (II) sulfide?

What do scientists do during data collection? O A. Analyze information to form a summary B. Gather information during an experiment C. Observe and ask scientific questions O D. Design an experiment to test a hypothesis

Organic molecules always: A. contain carbon. B. contain carbon, hydrogen, and oxygen respectively in a 1:2:1 ratio. C. are produced by living organisms. D. dissolve in water.

Whats the scientific notation of 0.00000923

A catalyst increases the rate of a chemical reaction by

What energy is changed to cell energy in stage 1 of photosynthesis. true or false