The following examples show how energy is transferred from one trophic level to the next. 10% of 5000 kcals is 500 kcals
10% of 300 kcals is 30 kcals
10% of 20 kcals is 2 kcals
Describe the pattern you see.

Energy is transferred along food chains, however, the amount of available energy decreases from one trophic level to the next. The reason for this is that only around 10 per cent of the energy is passed on to the next trophic level. ... it is released as heat energy during respiration.

Explanation: Hope this help

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