Front

What are hydrocarbons?

Back

Molecules that only contain carbon and hydrogen.

Front

What is Combustion?

Back

A reaction between a substance (fuel, wood, paper, etc.) and oxygen that releases carbon dioxide and water, with lots of energy.

Front

Which part of the Bunsen flame is the hottest?

Back

C

Front

What is specific heat capacity?

Back

The heat energy needed to raise the temperature of 1g of a substance by 1°C.

Front

In a heat exchange, if a metal cube at 70°C is immersed in water at 20°C, what happens?

Back

The metal loses heat while the water gains heat.

Front

What is the chemical formula for water?

Back

H₂O

Front

What is the process of photosynthesis?

Back

The process by which green plants use sunlight to synthesize foods with the help of chlorophyll.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What is an exothermic reaction?

Back

A reaction that releases energy in the form of heat.

Front

What is an endothermic reaction?

Back

A reaction that absorbs energy from its surroundings.