energy in food

Question 1

1kj=

Answer 1

1000 joules

Question 2

more kj the food contains..

Answer 2

more heat given off

Question 3

celllular respiration?

Answer 3

process by which organisms break down sugar and turn it into energy through cells

Question 4

practical example of how to know how much energy a food contains:

Answer 4

by burning pieces of food,the chemical energy stored in the molecular bond is released as heat and light. This heat can be measured in the unit-kilojoules. the more kj a food contains-more heat is given off when burned an example of cellular respiration

Question 5

joules?

Answer 5

standard unit of energy

Question 6

how do you find how much energy is stored in food per gram?

Answer 6

you divide the kj by the grams told to you to find one gram.you multiply your answer by how much grams wanted

Question 7

cupcake =205kj per 100 gram
how much energy does the cupcake have per 11 grams?

Answer 7

kj divided by grams
multiplied by how much grams asked
205 divided by 100= 2.05 times 11=22.55