Which of the following is a non metal that remains liquid at room temperature?

A. Phosphorous

B. Bromine

C. Chlorine

D. Helium

What is the most likely effect of the increase in carbon dioxide levels in the atmosphere

When scientists use one of their five senses to gather information, they are A making an interence. B. drawing a conclusion c. predicting a relationship D. making an observation

How are retroviruses different in their reproduction

What the purpose of the mucus found within the respiratory system is to A. trap particles from the air before they reach the lung. B. lubricate the epiglottis c. is wrong D. push the cilia away from the lungs

Which fossil organism in whale evolution do you think was the first to live mostly in water? explain your claim with evidence and reasoning?

Why might genetically engineering a crop to be herbicide resistant result in producing weeds that are herbicide resistant? O O O O The DNA in herbicide resistant crops does not affect insects.

When a nurse rubs your skin with rubbing alcohol prior to administering an injection, what process (es) is he carrying out? select all that apply?

Which of these is not an organism? a) lungs b) bacteria c) mold d) human

Why might to elements proces why might to elements possess similar chemical properties?

What happens in the electric circuit when the magnet spins?