Unit 2

Question 1

What does burning fossil fuel do to the earth

Answer 1

Burning fossil fuels produce carbon dioxide which is released into the atmosphere and which is said to contribute to the greenhouse effect

Question 2

What is a fuel

Answer 2

A fuel is a substance that releases energy when it burns

Question 3

What are the three main fossil fuels called

Answer 3

Coal, oil, natural gas

Question 4

What are fossils fuels and how are they formed

Answer 4

Fossil fuels are finite resources which means they will eventually run out. Fossil fuels are formed from dead plants and animals from millions of years ago. Compression, pressure and high temperature decomposes them forming fossil fuels

Question 5

4 common types of fuels

Answer 5

Gasoline, parrain, diesel fuel, petrol

Question 6

What gas is needed for burning to take place

Answer 6

Oxygen

Question 7

What’s the scientific name for burning reaction

Answer 7

Combustion

Question 8

Describe how and where one of the fossil fuels where formed

Answer 8

Coal- coal was made from millions of years ago and was formed from dead plants which covered in layers of mud and earth

Question 9

Why do we have a fuel crisis

Answer 9

Because fossil fuels are limited resources which means they will eventually run out

Question 10

Examples of renewable resources

Answer 10

Solar power: the sun rays create energy when the sunlight hits the cells the electrons flow through the cell which generates energy

Wind turbine: the nervy in the wind turns the blades around the roger which is connected to the main shaft that spins a generator to create energy

Question 11

The three things that make up a fire triangle

Answer 11

Heat, fuel and oxygen

Question 12

Fire extinguishers

Answer 12

Water- forest fighters are fought with water, sometimes dropped from aircrafts. Water takes heat away from the fire.

CO2- carbon dioxide is a denses gas that stops oxygen from getting into the fire

Question 13

What’s a carbohydrate

Answer 13

Carbohydrates are substances ,ade up of carbon hydrogen and oxygen. Carbohydrates can be split down into sugars and starch. Sugars are formed in plants during photosynthesis but the energy is often stored in the form of starch. Starch and sugar and the ,Ain sources of energy in our diet

Question 14

Positive results in starch sugar and protein

Answer 14

Starch- flour, potato powder, crisps… etc
Sugar- raisins
Protein- milk powder, potato powder, bread

Question 15

Photosynthesis what is it

Answer 15

Photosynthesis is when a plant makes their own food from absorbing nutrients from the environment. Light is also required for the process.

Question 16

Word equation for photosynthesis

Answer 16

Carbon dioxide+ water —> glucose + oxygen

Question 17

Why is it vital for our survival?

Answer 17

Plants produce oxygen during photosynthesis which we need to breathe. Plants are a,so the on,t living thing that can provide energy for us.

Question 18

Fertilisers

Answer 18

Plants require a variety of different nutrients in order to grow properly. Fertilisers are over used to ensure that this happens. Fertilisers are also used to make plants grow faster for example in food productions to ensure that supply meets demand.

Question 19

2 types of fertilisers

Answer 19

Synthetic fertilisers and natural fertilisers

Question 20

Nutrients required for plant growth

Answer 20

Nitrate, potassium, magnesium, phosphate

Question 21

Observe in plant deficiency

Answer 21

Magnesium- yellow leaves
Nitrate- stunted growth, turns leaves yellow
Potassium- poor flower growth, discoloured leaves
Phosphate- poor root growth, discoloured leaves

Question 22

Respiration

Answer 22

Animals obtain energy by a process called respiration. The reaction is used by animals in several different ways.

Question 23

Word equation for respiration

Answer 23

Glucose + oxygen -> carbon dioxide + water

Question 24

Fermentation

Answer 24

Fermentation is the process of converting carbohydrates into alcohol and carbon dioxide using yeast or bacitera is conditions where oxygen is not present

Question 25

Word equation for fermentation

Answer 25

Glucose —> alcohol + carbon dioxide

Question 26

What is fermentation used for

Answer 26

Fermentation is used to make bread and alcohol

Question 27

Medicinal plants

Answer 27

Medicinal plants are when chemicals in the plants is made into medicine

Question 28

Examples of medicinal plants

Answer 28

Also Vera- the leaves are widely used to treat/ heal wounds, burns or any skin reactions. It also soothes the skin

Daffodils- daffodils are traditionally used to case u to vomi the and reduces soreness of burns and wounds. The medicine is extracted from the bulb of the plant and is used to treat Alzheimer’s disease. The medicine that is produces is called galantamine

Question 29

Essential oils

Answer 29

a natural oil typically obtained by distillation and having the characteristic odour of the plant or other source from which it is extracted.