Chemistry Basics & Changes Quiz

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Test key concepts in elements, compounds, and changes of state.

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Elisha Ochieng'

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Chemistry Basics & Changes Quiz


Froggy Jumps Chemistry Basics & Changes QuizVersión en línea Test key concepts in elements, compounds, and changes of state. por Elisha Ochieng' 1 Which statement best defines an element? a A substance made of atoms of different elements b A substance that cannot be broken down into simpler substances c A substance with a fixed boiling point but variable composition 2 Which is a compound? a Hydrogen (H2) b Oxygen (O2) c Water (H2O) 3 What does a chemical word equation show? a Mixtures being separated by filtration b Physical state changes only c Reactants turning into new products with chemical change 4 Which change is physical? a Ice melting to water b Iron rusting c Wood burning 5 What happens to impurities on melting point? a No change in melting range b Melting point increases sharply c Melting point decreases and broadens 6 Boiling point is affected by impurities how? a Only decreases with impurities b Always constant at a fixed value c Boiling point may rise or fall and become a range 7 Which is an application of a heating curve? a Measuring density at room temperature b Identifying phase transitions by plateaus c Determining color changes in solutions 8 Which change of state involves energy absorption? a Melting b Deposition c Condensation 9 Which day-to-day example shows condensation? a Droplets on a cold drink can b Ice cream melting c Water boiling in a kettle 10 Which common element is well-known for forming many compounds? a Carbon b Argon c Neon 11 Fire is best defined as a __________. a physical change b slow chemical reaction c rapid chemical reaction producing heat and light 12 Which THREE components are required for a fire to exist? a Fuel, light, wind b Heat, fuel, oxygen c Oxygen, water, fuel 13 The diagram that shows the requirements for fire is called the __________ a A. Fire square b B. Combustion chart c C. Fire triangle 14 Which of the following is the correct symbol for Calcium? a A. CA b C. Ca c B. ca 15 What symbol do scientists use as a universal language for elements? a Chemical symbol (e.g., Fe for Iron) b Full element name only c Latin name of element 16 Which is the correct rule for writing symbols with two letters? a Both lowercase letters b First letter capital, second letter lowercase c Both letters capital 17 In a chemical word equation, what does the arrow mean? a Separates reactants and products b Shows the reaction direction from reactants to products c Indicates heating required 18 Rusting of iron is written as what word equation? a Iron Oxide → Iron + Oxygen b Iron + Oxygen → Iron Oxide c Iron + Water → Iron Hydroxide 19 Why are there flat plateaus on a heating curve? a Temperature drops during plateau b Heat is lost to surroundings c Latent heat changes state without temperature rise 20 Which diffuses faster, gases or liquids, and why? a Gases, because they’re cooler b Gases, due to higher kinetic energy and more space c Liquids, because they are denser 21 What happens to kinetic energy as temperature rises? a Kinetic energy stays the same b Particles slow down c Particles move faster and have more kinetic energy 22 What is a physical change? a New substance formed b Change that does not form a new substance c Irreversible chemical reaction 23 What are the three Fire Triangle components? a Fuel, Water, Pressure b Water, Soap, Oxygen c Fuel, Heat, Oxygen 24 Which class of fire involves ordinary combustibles? a Class C b Class B c Class A

Chemistry Basics & Changes Quiz

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Chemistry Basics & Changes QuizVersión en línea

por Elisha Ochieng'

Which statement best defines an element?

Which is a compound?

What does a chemical word equation show?

Which change is physical?

What happens to impurities on melting point?

Boiling point is affected by impurities how?

Which is an application of a heating curve?

Which change of state involves energy absorption?

Which day-to-day example shows condensation?

Which common element is well-known for forming many compounds?

Fire is best defined as a __________.

Which THREE components are required for a fire to exist?

The diagram that shows the requirements for fire is called the __________

Which of the following is the correct symbol for Calcium?

What symbol do scientists use as a universal language for elements?

Which is the correct rule for writing symbols with two letters?

In a chemical word equation, what does the arrow mean?

Rusting of iron is written as what word equation?

Why are there flat plateaus on a heating curve?

Which diffuses faster, gases or liquids, and why?

What happens to kinetic energy as temperature rises?

What is a physical change?

What are the three Fire Triangle components?

Which class of fire involves ordinary combustibles?