Column A 1. What forms body structures; protects from disease and speeds up chemical reactions in living things?: What forms body structures; protects from disease and speeds up chemical reactions in living things? 2. What helps living things perform chemical reactions and is essential for life ?: What helps living things perform chemical reactions and is essential for life ? 3. What contains instructions needed to carry out all functions of life?: What contains instructions needed to carry out all functions of life? 4. What provides the cells with energy and stores energy?: What provides the cells with energy and stores energy? 5. What forms structures in cells?: What forms structures in cells? Column B a. Lipids b. Carbohydrates c. Nucleic Acids d. Proteins e. Water

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

answer: you could do some invislibe ink.

explanation: i will tell you how to if u answer my question.

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)