S2 Chemicals in Agriculture

Essential oils can be extracted from parts of plants, such as orange peel, using the scientific equipment shown. What is this process called?

• Precipitation

• Distillation

• Crystallisation

• Neutralisation

Roughly there are how many people on the planet right now?

(a)  

What is dead, organic matter decomposed into before nitrates?

• Ammonia

• Bacteria

• Nitrogen

Three essential nutrients for plants are known as "NPK". IN THIS ORDER (NPK) what elements are referred to?

• Nickel, Potassium, Krypton

• Nitrogen, Potassium, Phosphorous

• Nitrogen, Phosphorous, Fluorine

• Nitrogen, Phosphorous, Potassium

How does potassium help plants to grow?

• Helps plants to have strong roots

• Helps plants to produce flowers and fruit

• Helps plants to have healthy leaves and stems

What element in NPK can be replaced naturally in the soil due to a chemical reaction between lightening and air?

(a)  

What form of nitrogen can plants use?

• Nitrogen gas

• Liquid nitrogen

• Nitrate

If a fertiliser has "15:20:10" on the label, what percentage of potassium is in it?

• 15

• 20

• 10

How much phosphorous is in 200kg of fertiliser labelled "15:20:10"?

• 20kg

• 10kg

• 15kg

True or false. The reaction to make ammonia is reversible?

• True

• False