End Of Year Test Flashcards
What is a fuel?
A substance that is burned to release energy
What is combustion?
Another word for burning
What happens when a substance burns?
It reacts with oxygen
What is the test for oxygen?
It relights a glowing splint
How is carbon dioxide produced?
Carbon reacts with oxygen.
What is the test for carbon dioxide?
The test for carbon dioxide is that it turns lime water cloudy
How is carbon monoxide produced?
Carbon monoxide is produced when carbon burns in an insufficient supply of oxygen.
What is carbon monoxide?
Carbon monoxide is a toxic gas.
How is water produced?
Hydrogen reacts with oxygen to produce water.
What is the test for hydrogen?
The test for hydrogen is that it burns with a squeaky pop
What is hydrogen being hailed as?
Hydrogen is being hailed as a fuel of the future
What are the fossil fuels?
Coal, oil and gas are all fossil fuels.
How were fossil fuels formed?
Coal, oil and gas were formed from the remains of plant and animal organisms that lived millions of years ago.
What produces carbon dioxide and water
Oil and gas burn to produce carbon dioxide and water
What do crude oil and natural gas mainly consist of?
Crude oil and natural gas consist mainly of compounds called hydrocarbons.
What do hydrocarbons contain?
Hydrocarbons only contain the elements hydrogen and carbon.
What is crude oil?
Crude oil is a mixture of hydrocarbons
What is fractional distillation?
Fractional distillation is a process used to separate substances with different boiling points.
What does fraction disilltation do to crude oil?
Fractional distillation is used to separate crude oil into fractions
What is a fraction in chemistry?
A fraction is a group of hydrocarbons all with boiling points in a specific range.
What do fractions have?
Fractions have names and different uses
Other than boiling points what do fractions differ in?
Fractions also differ in viscosity and flammability
What is acid rain caused by?
Acid rain is caused when gases such as sulphur dioxide and nitrogen dioxide dissolve in water in the atmosphere
What does acid rain do?
Acid rain kills fish in rivers, erodes buildings and destroys plant life.
How is sulphur dioxide produced
Sulphur dioxide is produced when fossil fuels are burned
How is nitrogen dioxide produced
Nitrogen dioxide is produced by sparking of air in a petrol car engine.
What are some ways that pollution from fossil fuels can np be reduced?
Lean-burn engines, catalytic converters, low sulphur petrol.
What is photosynthesis
Photosynthesis is the process by which plants make carbohydrates from carbon dioxide and water, using ,gout energy in the presence of chlorophyll
Why are carbohydrates an important food for animals?
They provide energy
What happens when carbohydrates are burned?
Because carbohydrates release energy, they produce carbon dioxide and water when burned.
What is the word equation for photosynthesis and respiration
Glucose + Oxygen = Carbon Dioxide
How are alcoholic drinks made?
Alcoholic drinks can be made from any fruit or vegetable which is a source of starch or sugars.
What is an enzyme in yeast?
An enzyme in yeast is the catalyst for the reaction of alcohol
How does the type of alcoholic drink vary?
The type of alcoholic drink varies with the plant source of the carbohydrate.
How is distillation used in alcohol?
Distillation is used to increase the alcohol concentration of the products from fermentation
