Podcast
Questions and Answers
Compounds are chemical substances that contain more than one ______.
Compounds are chemical substances that contain more than one ______.
element
This tells us there are two ______ atoms for every single carbon atom.
This tells us there are two ______ atoms for every single carbon atom.
oxygen
Which of the following is NOT evidence of a chemical reaction?
Which of the following is NOT evidence of a chemical reaction?
- An increase in the number of atoms (correct)
- A change in temperature
- A change in color
- Formation of bubbles
What happens to atoms during a chemical reaction?
What happens to atoms during a chemical reaction?
How can chemical reactions be represented?
How can chemical reactions be represented?
Which of the following is NOT evidence of a chemical reaction?
Which of the following is NOT evidence of a chemical reaction?
Chemical reactions can be represented using ______.
Chemical reactions can be represented using ______.
What happens to the number of atoms during a chemical reaction?
What happens to the number of atoms during a chemical reaction?
What are some examples of evidence for a chemical reaction?
What are some examples of evidence for a chemical reaction?
Why do bubbles form in boiling water, but do not indicate a chemical reaction?
Why do bubbles form in boiling water, but do not indicate a chemical reaction?
Why is adding a teabag to boiling water not considered a chemical reaction?
Why is adding a teabag to boiling water not considered a chemical reaction?
How are chemical reactions used?
How are chemical reactions used?
What is an example of a chemical reaction used in cooking?
What is an example of a chemical reaction used in cooking?
What happens when honeycomb is made using chemical reactions?
What happens when honeycomb is made using chemical reactions?
Which ingredient is NOT used in making honeycomb?
Which ingredient is NOT used in making honeycomb?
What happens when bicarbonate of soda is added to the mixture?
What happens when bicarbonate of soda is added to the mixture?
What is done to the honeycomb after it hardens?
What is done to the honeycomb after it hardens?
Which of the following is an example of oxidation mentioned in the text?
Which of the following is an example of oxidation mentioned in the text?
What happens to a substance when oxygen is bonded to it?
What happens to a substance when oxygen is bonded to it?
What is the opposite reaction of oxidation?
What is the opposite reaction of oxidation?
Which of the following is an example of oxidation mentioned in the text?
Which of the following is an example of oxidation mentioned in the text?
What is the term used when oxygen is bonded to a substance?
What is the term used when oxygen is bonded to a substance?
What happens to the mass of iron when it combines with oxygen to form iron oxide?
What happens to the mass of iron when it combines with oxygen to form iron oxide?
Which of the following is an example of oxidation mentioned in the text?
Which of the following is an example of oxidation mentioned in the text?
What is the opposite reaction of oxidation?
What is the opposite reaction of oxidation?
What happens to the mass of iron when it combines with oxygen to form iron oxide?
What happens to the mass of iron when it combines with oxygen to form iron oxide?
Which gas is being released during the reaction described in the text?
Which gas is being released during the reaction described in the text?
What is the purpose of adding manganese dioxide in the reaction?
What is the purpose of adding manganese dioxide in the reaction?
What happens to the mass of the manganese dioxide catalyst during the reaction?
What happens to the mass of the manganese dioxide catalyst during the reaction?
Which of the following is a typical sign that a chemical reaction is happening?
Which of the following is a typical sign that a chemical reaction is happening?
What is a catalyst?
What is a catalyst?
What is the purpose of wearing safety glasses and gloves when working with hydrogen peroxide?
What is the purpose of wearing safety glasses and gloves when working with hydrogen peroxide?
Which type of reaction is described as giving off heat into the surroundings?
Which type of reaction is described as giving off heat into the surroundings?
What happens to the temperature of the surroundings when an exothermic reaction occurs in an insulated cup?
What happens to the temperature of the surroundings when an exothermic reaction occurs in an insulated cup?
What are reactions called that absorb energy from their surroundings and make the reacting substances feel cold?
What are reactions called that absorb energy from their surroundings and make the reacting substances feel cold?
Which of the following is a characteristic of compounds?
Which of the following is a characteristic of compounds?
What is the product of the reaction between iron and oxygen?
What is the product of the reaction between iron and oxygen?
What does the arrow in a word equation represent?
What does the arrow in a word equation represent?
What should you do if you find yourself with a chip pan or oil fire?
What should you do if you find yourself with a chip pan or oil fire?
What is the main reason for tackling different types of fires in slightly different ways?
What is the main reason for tackling different types of fires in slightly different ways?
Why is it unsafe to leave a fire unattended for a long time?
Why is it unsafe to leave a fire unattended for a long time?
Which of the following is NOT one of the three things needed for a fire to start?
Which of the following is NOT one of the three things needed for a fire to start?
What is oxidation?
What is oxidation?
What is combustion?
What is combustion?
Study Notes
Compounds and Chemical Reactions
- Compounds are chemical substances that contain more than one element.
- Chemical reactions involve the rearrangement of atoms to form new compound molecules.
- Example: Carbon atoms react with oxygen atoms to form carbon dioxide (COâ‚‚) molecules, with a ratio of one carbon atom to two oxygen atoms.
Applications of Chemical Reactions
- Chemical reactions are used to create new chemicals, such as plastics and medicines.
- Burning fuels in chemical reactions releases energy, which is used to:
- Heat homes
- Power cars
- Generate electricity
- Chemical reactions are used in cooking to make food safe and tasty to eat.
Chemical Reactions in Cooking
- A chef uses chemical reactions in their kitchen to make honeycomb.
- The reaction involves adding honey, glucose, sugar, water, and bicarbonate of soda to create a chemical reaction.
- The reaction produces bubbles, similar to lava, and takes about an hour to harden before it can be eaten.
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Description
Test your knowledge of chemical reactions and compounds with this quiz! Learn how atoms rearrange to form new compound molecules and understand the impact of certain compounds, like carbon dioxide, on the environment.
