The Earth, its oceans and atmosphere are made of elements and compounds in different states. The particle model may be used to explain the different properties of the solid, liquid and gas states.
How does the particle model help explain why a liquid can flow?
The particles are arranged close together
The particles are arranged in a regular pattern
The particles are able to slide past one another
What is the name of the change of state where a solid changes straight into a gas?
What is the state of hydrogen sulfide at -75°C? Its boiling point is -61°C and its melting point is -85°C.
Which of the following provides evidence for the release of oxygen into Earth's early atmosphere?
Analysis of volcanic gases
Fossil plants in dated rocks
A gas test
Which of the following results in a decrease in the amount of carbon dioxide in the atmosphere?
Burning of fossil fuels
Respiration of animals
Photosynthesis by plants
Which compounds are products of incomplete combustion of a hydrocarbon fuel?
Carbon dioxide and water
Carbon monoxide and carbon
Carbon monoxide, carbon and water
What is the test for oxygen?
Relights a glowing splint
Makes a squeaky pop
Turns limewater cloudy
The use of hydrocarbon fuels causes the production of pollutants. Which pollutant is caused by impurities in the fuel?
Oxides of nitrogen
Which of these methods will reduce the emission of sulfur dioxide into the atmosphere?
Which of these is a limitation of the particle model? - Higher
It does not explain why gases fill a container
It does not explain why solids keep their shape
It does not explain why substances have different boiling points