A food chain is a linear network of links in a food web starting from producer organisms (such as grass or trees which use radiation from the sun to make their food)
What is a food chain?
100
Physical changes are changes affecting the form of a chemical substance, but not its chemical composition.
what is a physical change?
200
organism with more than one cell
What is a multicellular organism?
200
sodium is the element symbol
What is the symbol for sodium?
200
-a gas is produced
-light is produced
-heat is absorbed or produced
-a permanent colour change occurs
-a precipitate
What are the signs of chemical changes?
200
the arrows represent 'eaten by'
What do the arrows in food chains and food webs represent?
300
mitosis is a type of cell devision used for growth and repair in multicellular organism.
What is the type of cell devision used for growth and repair in multicellular organisms?
300
metals and non-metals are included on it
What is included on the periodic table?
300
yes because the sugar has burned changing it
is it a chemical change when sugar burns
300
a food chain has one producer and one consumer while a food web has more than one producer and consumer
What is the difference between a food chain and a food web?
400
a pure substance that cannot be broken down into a simpler substance
What is an element?
400
you can't reverse it because it is already mixed
a mixture is a chemical change because...
400
All food chains and webs have at least two or three trophic level.
How many trophic levels do food chains and webs have?
500
do you think functioning organisms are hard to study?