What is parent rock?

Will fluorite scratch penny why or why not

Water on Earth is billions of years old. True or False?

The graph shows the depth of a pond in minnesota each month during 1993. Depths below 50 centimeters are dangerous to the living organisms in a pond. According to the graph how many months in the year were the pond organisms in danger

The type and amounts of plants that grow in an ecosystem heavily depend on the average precipitation levels and length of the growing season. how would these factors be classified

Anything that causes a reaction is considered a stimulus true or false?

Which fossil would look most like an ancient organism? * trace cast mold?

Hydrogen is in column 1 of the periodic table What information does this give us? There is one other element that hydrogen will bond with There is one neutron in the nucleus.

Most plant must draw resources from two very different environments. Explain this statement?

When is facilitated diffusion necessary? a. When the molecules are too large. b. When the molecules are insoluble. c. When the direction of movement is opposite to natural diffusion. d. none of the above

G1, S, and G2 are all phases of which part of the cell cycle? a. interphase b. anaphase c. prophase d. telophase