A teacher is giving a demonstration at the front of the classroom. The students are being asked to identify which group an element would belong to based on its properties. A bowl of water sits on the lab bench, along with a butter knife and the unidentified element. The teacher buts the element into very small pieces using a butter knife. She shows the class that the element is sold and has a dull finish. She drops the small piece of the element into the bowl of water where it briefly sizzles, and a flash of light appears. -Based on the demonstration, what family (group) do you think this element belongs in? Justify your answer using evidence from the text.

The earth's moon is unusually large. two popular theories of the moon's origin include the "sister world" hypothesis, which states that the moon formed from the same materials as the earth, near enough to the earth that they fell into orbit around each other. a second theory is the "capture" hypothesis, in which the moon formed elsewhere in the solar system, and the earth's gravity pulled it into its orbit. studies of what the moon is made of indicate that some of its materials had to come from the earth or from the same area of the solar system where the earth had formed. at the same time, the moon does not contain much of the material that makes up the earth's core, so the moon could not have formed from the same materials as the earth. how do the two facts above affect the described theories of the moon's origin? a. they show that scientists will never agree on where the moon came from. b. they show that more experiments on moon formation need to be done. c. they show that no theory accounts for the existence of the moon. d. they show that neither theory is complete and entirely correct.

What is the correct term for living the most sustainable life you can within your current circumstances?

What human activity increases beach erosion?