They're mineral ions.
Examples are calcium and iron
They can prevent diseases such as ricket (soft bones) and anaemia (not enough blood)
Answer:
Hypothesis, the amount of light must be enough to provide for the plant but not too much where it'll die and vice versa.
The amount of water should be enough that the plant can absorb it to sustain itself but too much or too little
Plant food in small quantities will help but too little or too much won't
Explanation:
Answer:
TO TEST SUPPLY OF WATER QUALITY OF THE LOCALITY Excessively high and low pHs can be detrimental for the use of water. High pH causes a bitter taste, and water pipes.
