1 3 8 Minerals Minerals What are minerals

Minerals What are minerals? They are salts formed from the earth’s rocks. These mineral

Minerals and Plants absorb minerals through their roots. They use: • Calcium (Ca) to

Minerals and Animals get their minerals in the food they eat. They use •

Learning check How do plants get their minerals? _________________ Plants absorb minerals through their

Learning check How do animals get their minerals? ________ In the food they eat

Minerals Summary They are required to: • Form part of rigid body tissues Calcium

Need to know • Minerals required in small amounts • Minerals used in three

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1. 3. 8 Minerals

Minerals What are minerals? They are salts formed from the earth’s rocks. These mineral salts then dissolve in water and are absorbed by plants. Animals get their minerals by eating plants or other animals that contain them. NB Minerals are required by organisms in very small amounts. 2

Minerals and Plants absorb minerals through their roots. They use: • Calcium (Ca) to make cell walls • Magnesium (Mg) to make the pigment chlorophyll • Nitrates (N) to make proteins • Phosphates (P) to make ATP, DNA 3

Minerals and Animals get their minerals in the food they eat. They use • Calcium (Ca) to make bones and teeth • Iron (Fe) to make the pigment haemoglobin • Sodium (Na) for the regulation of the osmotic balance (water content) of cells and the blood. 4

Learning check How do plants get their minerals? _________________ Plants absorb minerals through their roots Plants use: cell walls • Calcium (Ca) to make ____ pigment • Magnesium (Mg) to make the _____ chlorophyll _____ • Nitrates (N) to make proteins ______ ATP, DNA • Phosphates (P) to make _____ 5

Learning check How do animals get their minerals? ________ In the food they eat Animals use: and teeth • Calcium (Ca) to make bones ______ • Iron (Fe) to make the pigment haemoglobin _____ • Sodium (Na) for the regulation of the osmotic balance (______) _______ water content of cells and the blood. 6

Minerals Summary They are required to: • Form part of rigid body tissues Calcium in bones and cell walls • Form certain pigments Iron is needed to make haemoglobin – the red pigment of blood Magnesium is needed to make chlorophyll – the green pigment in plants • Regulate body fluids Sodium balances water content in cells 7

Need to know • Minerals required in small amounts • Minerals used in three ways – Form part of rigid body structures – Form soft body tissues – Function in cellular and body fluids • State the requirements & use of any 2 minerals in plants. • State the requirements & use of any 2 minerals in animals. 8

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