Podcast
Questions and Answers
Which of the following is a characteristic feature of physical changes?
Which of the following is a characteristic feature of physical changes?
- Accompanied by energy change
- Change in the chemical composition
- No change in the identity of the substance (correct)
- Formation of new substances
When a tree grows taller, what type of change is it considered?
When a tree grows taller, what type of change is it considered?
- Biological change (correct)
- Physical change
- Chemical change
- Mechanical change
Which of the following is a common misconception about chemical changes?
Which of the following is a common misconception about chemical changes?
- The original substance maintains its identity
- The change is generally temporary
- The original substance is completely lost (correct)
- The change is not accompanied by energy change
When a nail rusts, what type of change does it represent?
When a nail rusts, what type of change does it represent?
Which process involves a change in the molecular structure of substances?
Which process involves a change in the molecular structure of substances?
In which of the following scenarios is energy always absorbed or released?
In which of the following scenarios is energy always absorbed or released?
Which characteristic feature is typically associated with chemical changes?
Which characteristic feature is typically associated with chemical changes?
Which process is an example of a chemical change?
Which process is an example of a chemical change?
What drives the formation of chemical bonds?
What drives the formation of chemical bonds?
Which type of change best defines a chemical reaction?
Which type of change best defines a chemical reaction?
What precaution should be taken during the reaction between magnesium and oxygen?
What precaution should be taken during the reaction between magnesium and oxygen?
Why is cleaning the magnesium ribbon with sandpaper necessary before burning it?
Why is cleaning the magnesium ribbon with sandpaper necessary before burning it?
