States of Matter
The change of state when a liquid turns into a solid.
Freezing
Name the most common gas in the atmosphere.
Nitrogen
Name one of the three groups of rocks
Igneous, Metamorphic or Sedimentary
Name two signs of a chemical reaction
Name one method of increasing the rate of reaction.
Changing temperature, concentration or particle size
Adding a catalyst
Describe the particle arrangement in a solid.
Particles are tight together and arranged in neat rows and columns.
Describe the test for hydrogen
Burns with a pop
Describe how igneous rocks are made.
Lava or magma cools down (either above ground or below)
Name an everyday reaction
Various
True of false: Increasing the particle size increases the rate of reaction
False
State the four parts of the water cycle.
Evaporation -->Condensation --> Precipitation --> Water returns to lakes
Describe the test for Carbon Dioxide
Lime water turns milky in the presence of carbon dioxide
What causes rocks to be broken down into sediments over time?
Weathering
Name two physical changes
Melting, Freezing, Condensation, Evaporation, Dissolving
True or False: A catalyst is used up in a chemical reaction.
False
What is the residue and filtrate in a filtration experiment?
Residue is what has been removed from the solution and is left over in the filter paper. Filtrate is the solution left over in the beaker.
Describe why greenhouse gases are good.
Protects the planet from extreme temperatures
Name two types of ions which can change the hardness of water.
Calcium and Magnesium Ions
What does the left hand side a chemical equation contain
Reactants
Why must we consider control variables?
Keep experiments fair.
The separation technique used to separate a soluble solute from a solution
Evaporation
Apart from Carbon Dioxide, name one of the gases which contributes to acid rain
Sulphur Dioxide and Nitrogen Dioxide
Describe one advantage and one disadvantage of hard water
Advantages - Good for bones or teeth/ Some people prefer the flavour
Disadvantages - Difficult to form a lather with soap, Lime scale forms
In a photosynthesis reaction: Carbon Dioxide and Water react to produce glucose and oxygen. Write this as a chemical equation.
Carbon Dioxide + Water ----> Glucose + Oxygen
Describe how concentration of a substance affects the rate of reaction.
As concentration is increased, the rate of reaction also increases.