Chemical Reactions

When methane burns in oxygen, carbon dioxide and water are made. Which is a reactant?

• Oxygen

• Carbon dioxide

• Water

• Heat

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Copper oxide and carbon dioxide are made when copper carbonate is heated strongly. Which is a product?

• Heat

• Copper carbonate

• Copper oxide

• Oxygen

Tags

NGSS.MS-PS1-2

What name is given to the force that hold atoms together in a compound?

• Chemical bond

• Gravity

• Electrostatic attraction

• Glue

What is another name for combustion?

• Reduction

• Burning

• James

• Displacement

Combustion reactions always release energy. What word can be used to describe them?

• Endothermic

• Exothermic

• Reversible

• Fluorescent

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Which of these is found in the fire triangle and is therefore essential for combustion?

• Oxygen

• Water

• Carbon dioxide

• Hydrogen

What is produced when a fuel burns in a very good supply of oxygen?

• Carbon monoxide and water

• Carbon and water

• Carbon dioxide and water

• Oxygen and water

Which type of combustion releases the most energy?

• Complete combustion

• Incomplete combustion

• Thermal decomposition

• Total combustion

A teacher finishes using a Bunsen burner and (unwisely) blows it out before switching off the gas. By blowing on the flame to extinguish it, which part of the fire triangle is being removed?

• Heat

• Triangle

• Fuel

• Oxygen

What method should be used to extinguish an electrical fire?

• Carbon dioxide

• Water

• Turning off the appliance

• Blowing on it