C2g-fertilisers And Crop Yields

Question 1

How do plants absorb minerals?

Answer 1

Through their roots

Question 2

What are fertilisers?

Answer 2

Chemicals that provide plants with essential chemical elements

Question 3

What are three essential elements needed for plant growth?

Answer 3

Nitrogen
Phosphorus
Potassium

Question 4

What is an argument for using fertilisers?

Answer 4

World population rising need to produce more food

It increases food supply

Question 5

What is an argument against using fertilisers?

Answer 5

Eutrophication and pollution of water supplies

Question 6

What is eutrophication?

Answer 6

• run off of fertiliser
• increase of nitrate, phosphate in river water
• algal bloom
• blocks off sunlight to other plants which die
• aerobic bacteria use up oxygen
• most living organisms die

Question 7

What apparatus is needed to prepare a fertiliser by neutralisation of acid and alkali?

Answer 7

Burette
Measuring cylinder
Filter funnel

Question 8

Nitric acid+ ammonium hydroxide=?

Answer 8

Ammonium nitrate

Question 9

What are the reactants of making a synthetic fertiliser?

Answer 9

Sulphuric acid

Ammonia solution

Question 10

What is the method of making a synthetic fertiliser?

Answer 10

Add acid to alkali
Stop when it turns green
Leave to crystallize

Question 11

How do fertilisers increase the crop yield?

Answer 11

Replaces essential elements used by a previous crop
Provides extra essential elements
More nitrogen gets incorporated into plant protein so increased growth