Definitions
What is an enzyme?
A biological catalyst
How would a scientist separate a mixture of insoluble iron powder and water?
Filtration
Is growing a crystal an example of a physical or chemical change?
Physical (no new chemical formed, evaporation of water leads to growth)
Simplify the following ratio
24:8
3:1
When is the predicted opening date of the new Paisley Grammar campus?
August 2026
What is an exothermic reaction?
A chemical reaction which releases heat
Draw the apparatus needed to carry out evaporation of salt dissolved in water
Bunsen burner, tripod stand, evaporating basin
Name the compound created when calcium, carbon and oxygen react?
Calcium carbonate
A chemical reaction produced 150 litres of water over 4 hours, what was the rate of reaction per hour?
37.5 litres of water per hour
What are the names of the two shopping centres in Paisley town centre?
The Piazza and the Paisley Centre
What is a compound?
When two or more chemicals are chemically joined together
What are the gas tests for hydrogen, oxygen and carbon dioxide?
Hydrogen burns with a pop, oxygen relights a glowing splint and carbon dioxide turns limewater cloudy
What is the difference between a physical change and a chemical reaction?
Physical changes are when chemicals change state but their is no chemical change, chemical reactions are when a new substance is formed with different chemical properties
Find the average:
12, 17, 13, 4, 9
11
Barshaw park was opened in in which year? (Within 10 years)
1912
What is concentration?
The number of particles in a solution
Name four signs of a chemical reaction
Colour change, precipitate formed, gas released, smell, change in temperature
Write the following as a word equation: Solid zinc reacts with hydrochloric acid to produce zinc chloride and hydrogen gas
Zinc + Hydrochloric acid-> Zinc chloride + Hydrogen
A chemical reaction produced oxygen gas at a rate of 50 cm3 per minute, predict the rate of reaction if a catalyst was added to the same reaction if repeated?
Anything above 50cm3
What was the name of Lady Gaga's newly released album on the March 7th?
Mayhem
What is an element?
An element is the simplest form of a chemical, it has one type of atom
Name four ways that you can speed up a chemical reaction?
Give an example of an exothermic reaction, an endothermic reaction, a physical change and a chemical change.
Exothermic (dynamite, fireworks), endothermic (photosynthesis, sherbet on tongue, ice pack), physical change (melting chocolate, breaking a window, ice melting) and chemical change (burning magnesium ribbon, food rotting)
Simplify 121: 33
11:3
Which country is hosting eurovision in 2025?
Switzerland