Changes in matter: physical versus chemical changes
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Last updated over 2 years ago
4 questions
1
Read the section "What Is A Chemical Change?" Which sentence from this section supports the conclusion that chemical changes are often noticeable?
Read the section "What Is A Chemical Change?" Which sentence from this section supports the conclusion that chemical changes are often noticeable?
1
Read the paragraph from the section "Chemical Change Or Physical Change?"
"Brass is a common example of an alloy. It's used to make musical instruments including trumpets and trombones. Brass is made up of about 60 percent copper and 40 percent zinc. It has different properties than either copper or zinc alone. Yet it is not the result of chemical reaction."
Which detail from this paragraph supports the conclusion that physical changes can result in the creation of unique substances?
Read the paragraph from the section "Chemical Change Or Physical Change?"
"Brass is a common example of an alloy. It's used to make musical instruments including trumpets and trombones. Brass is made up of about 60 percent copper and 40 percent zinc. It has different properties than either copper or zinc alone. Yet it is not the result of chemical reaction."
Which detail from this paragraph supports the conclusion that physical changes can result in the creation of unique substances?
1
Read the selection from the introduction [paragraphs 1-2].
"Physical changes in matter are reversible. For example, an ice cube can melt into liquid water, and then the liquid water can be refrozen into an ice cube. A chemical change is very different. A burning log demonstrates this. The log turns to ashes. However, its ashes cannot be changed back into a log. The burning was a chemical change. Unlike a physical change, it cannot be easily reversed."
Which phrase from the selection helps the reader understand the meaning of "reversed"?
Read the selection from the introduction [paragraphs 1-2].
"Physical changes in matter are reversible. For example, an ice cube can melt into liquid water, and then the liquid water can be refrozen into an ice cube. A chemical change is very different. A burning log demonstrates this. The log turns to ashes. However, its ashes cannot be changed back into a log. The burning was a chemical change. Unlike a physical change, it cannot be easily reversed."
Which phrase from the selection helps the reader understand the meaning of "reversed"?
1
The word "matter" is essential to understanding physical and chemical changes. Which sentence from the article explains what "matter" is?
The word "matter" is essential to understanding physical and chemical changes. Which sentence from the article explains what "matter" is?