Which of the following most likely explains why the chemical symbol for calcium is Ca? a.) The symbol C was already used for carbon.

b.) The symbol was assigned by modern alchemists.

c.) Calcium is made of more than one type of atom.

d.) The element is named after the Latin word for calcium.

Researchers want to use edna to look for an invasive species in the water which of the steps would be likely do last

Astudent reads the following text in a science book: scientific evidence tells us that the cause of earths four seasons is the tilt of earth as it revolves around the sound the student is instructed to illustrate this information in a science book. how will the student illustrate winter in the northern hemisphere? a. earths northern hemisphere will tilt away from the sun. b. earths northern hemisphere will tilt toward the sun. c. earths orbit will be farther away than from the sun d. earths southern hemisphere will tilt away from the sun.

What's wrong with this ecological pyramid? (multiple choice)1. secondary consumers should be at the bottom of the pyramid2. the sun has an arrow leading to decomposers 3. primary consumers should come after the sun4. energy retained should increase from the bottom to the top5. the sun should be at the bottom of the pyramid