For a solar eclipse to occur which of the following alignments is necessary? a. the moon is located along a straight line between the sun and earth b. the is located along a straight line between the sun and moon c. the moon is located from a line between the sun and earth d. the earth is located from a line 90 degrees between the sun and moon

A. I'm pretty sure, could be C though..

the answer is d : ) have a good da

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance