Fuels

Fuels need what to burn?

• Carbon dioxide
• Sulphur dioxide
• Oxygen
• water

Fuels are mainly composed of

• Hydrocarbons
• Carbon dioxide
• Hydrogen
• Oil

Fossil Fuels formed over long periods of time after particles in water settled to the sea floor and formed marine mud.  What kinds of particles needed to be present in the marine mud in order for fossil fuels to form.

• Mostly sand and a few small bits of wood
• Mostly decaying organisms
• Mostly lava and a few sedimentary rocks
• Mostly metal minerals

When carbon dioxide dissolves in water it forms

• carbonic acid
• hydrochloric acid
• citric acid
• carbonic hydroxide

The conditions which are required for combustion to take place are:

• fuel
• ignition temperature
• oxygen
• all of these

The chemical formula for methane is

• CH₃
• SO₄
• CH₄
• CO₂

Material produced from living or recently living plants or animals and their metabolic byproduct is?

• char
• MSW
• biofuel
• biomass

Which of the following is true of an element in an excited state?

• It has emitted a photon and its energy has decreased
• It has emitted a photon and its energy has increased
• It has absorbed a photon and its energy has increased
• It has absorbed a neutron and its energy has increased

Tags

NGSS.HS-PS4-3

In a redox reaction, the substance that accepts electrons is said to be 

• reduced
• oxidized
• electrified
• clarified

Avogadro's number is also known as

• one molecule
• one liter
• one mole
• one dozen