WorksheetsScience Quiz
Total questions: 20
Worksheet time: 10mins
What do WHMIS symbols represent?
Chemical elements
Safety information
Physical properties
Atomic numbers
Which of the following is a physical property?
Reactivity with acid
Color
Flammability
Toxicity
What is the difference between pure substances and mechanical mixtures?
Pure substances have variable composition
Mechanical mixtures are chemically bonded
Pure substances have a uniform composition
Mechanical mixtures are elements
Who made key contributions to the theories of matter?
Isaac Newton
Albert Einstein
Robert Boyle
Marie Curie
Who is known for the discovery of the electron?
Antoine Lavoisier
John Dalton
JJ Thomson
Ernest Rutherford
What is the main difference between ionic and molecular compounds?
Ionic compounds are formed by sharing electrons.
Molecular compounds are formed by transferring electrons.
Ionic compounds are formed by transferring electrons.
Molecular compounds are formed by sharing protons.
Which of the following is a characteristic of exothermic reactions?
They absorb heat.
They release heat.
They do not involve heat.
They require light.
What does the law of conservation of mass state?
Mass can be created or destroyed.
Mass is always lost in a chemical reaction.
Mass is conserved; it is neither created nor destroyed.
Mass is only conserved in physical changes.
What is necessary for balancing chemical equations?
Changing the chemical formulas of reactants.
Adding new elements to the equation.
Ensuring the number of atoms for each element is equal on both sides.
Removing products from the equation.
What is a characteristic of endothermic reactions?
They release heat.
They absorb heat.
They require sound.
They do not involve heat.
Which of the following is a chemical property?
Boiling point
Density
Melting point
Reactivity with water
What is the main difference between elements and compounds?
Elements are made of multiple types of atoms.
Compounds are made of one type of atom.
Elements are made of one type of atom.
Compounds cannot be broken down into simpler substances.
What is a catalyst?
What are the horizontal rows in the periodic table called?
The name of the "ingredients" of a reaction are called?
Elementals that are found close to the "staircase" are called?
Which family group of metals is most reactive?
If you mix 10g of hydrochloric acid to 15g of sodium hydroxide. How many grams of product would you expect to have if it was in a closed system?
Flammability, reactivity to water, and toxicity are all examples of what kind of property?
What subatomic particles are found in the nucleus of an atom?
