Most scientific questions are based on opinions. hypotheses. observations. experimental dat

A woman with normal blood clotting has four children. They are a normal son a hemophiliac son and two normal daughter. The father have hemophiliac. Explain which parents gave the hemophiliac to the hemophiliac son.

Which of the following is the best example of erosion? A. Sediment piling up at the mouth of a river B. Plant roots growing through concrete and splitting it C. Waves carrying sand away from a beach D.

Quincy wants to see a real example of rock weathering. Where would be the best place for him to go? A. up on the roof of his house B. to a pond down the street C. downstairs in his basement D. up in the mountains

When objects like horseshoe are left outside over time, the iron in them will react with oxygen to produce rust. Is this a chemical property of iron?

You have a 5-liter container with 1.30 X 10^24 molecules of ammonia has (NH3). How many molecules of hydrogen gas (H2) are in an identical container at the same temperature and pressure

How much uranium was used in the first atomic bomb?

If you were in a completely dark room, the room would still be "shining" in this type of light: A) X rays B) visible C) infrared D) ultraviolet

Sand, also known as silicon dioxide, is the main component of glass. If a glass blower used 10 kg of sand, combined with. 5 kg of sodium carbonate and 1.

What are explosives made up of

I found a type of rock in the woods it's kinda rough black with some purple like a lavender purple and i can break it into pieces what could it be?