Because it keeps us healthy by helping food move through the intestines and preventing constipation.
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How can you test for starch
add two drops of iodine solution, if there is starch it will turn a blue-black colour.
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How can you test for protein
Place a food sample in a test tube to a depth of about 1cm, then add five drops of biuret solution.If there is a purple colour within a few minutes then it is protein.
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What happens if the carbohydrates you eat are not all used up.
They may then turn into fat.
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What is the process that releases energy from food called
Respiration
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What happens as your cells respire
The enegy is transferred
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Which nutrient is most important for growth and repair
Protein
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what is iron(vitamin) used for
Making red blood cells
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What can people who eat too little or too much nutrients suffer from
Malnutrition
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What can happen to people who lack a nutrient for too long
it can cause Deficiency diseases
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What is the most severe form of malnutrition
Starvation
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What process breaks down the nutrients in our body to smaller ones(if they are too big)
Digestion
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define the word 'soluble'
able to be dissolved
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What Kingdom are bacteria part of
Prokaryotic
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Charge of proton
+1
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charge of neutron
0
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charge of electron
-1
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What do bacteria not have
A nucleus
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What are microorganisms an important part of
Ecosystems because they are decomposers
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Name three decomposers
Bacteria,Fungi and Protoctists
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What do atoms contain
A central nucleus with electrons around it
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What do the positive and negative charges of an atom do
They balance eachother out
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What does an atom that loses an electron or gains one change into
an ion because there is no longer a balanced charge
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In a metal the attraction between the positive and negative charges holds the structure together. What is this called
Metallic Bonding
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What is a molecule and what does it contain
A molecule is an electrically neutral group of two or more atoms held together by chemical bonds. Molecules are distinguished from ions by their lack of electrical charge.
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What is an ionic compound
A positively charged metal ion and a negatively charged non metal ion attract one another . These are called ionic bonds, compounds held together with ionic bonds are ionic compounds
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