What are the signs of a chemical change? signs of a chemical change?
10.
10. Light and Light and heat may heat may be produced be produced during aduring a .
. 11.
11. When When a a substance substance changes changes , , forfor example, when iron rusts and turns brownish-red, this is a sign example, when iron rusts and turns brownish-red, this is a sign that a chemical change has occurred.
that a chemical change has occurred.
12.
12. If you If you see bubbles form when see bubbles form when two substances artwo substances are combined,e combined, this
this indicates indicates that that a a has has formed,formed, another sign that a chemical change has occurred.
another sign that a chemical change has occurred.
13.
13. When When fireworks fireworks explode, explode, and and heatheat indicate a chemical change has occurred.
indicate a chemical change has occurred.
14.
14. Cooking an Cooking an egg is egg is an ean example of xample of aa change.
change.
Summarize the Main Idea Summarize the Main Idea
15.
15. Describe the two Describe the two wayways that matts that matter can change. How can er can change. How can youyou tell which type of change has occurred?
tell which type of change has occurred?
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124 Chapter 6 •Chapter 6 • Matter Matter Use Use withwithLesson 3Lesson 3 Reading
Reading and and Writing Writing in in Science Science Changing Changing MatterMatter
Vocabulary Vocabulary
Changing Matter Changing Matter
a.
a. burning burning d.d. mixture mixture g.g. spoils spoils b.
b. chemical change chemical change e.e. physical physical changechange c.
c. elements elements f.f. rust rust
Match the correct letter with the
Match the correct letter with the description.description.
1.
1. Matter Matter changes, changes, but but its its makeup makeup does does not not change.change.
2.
2. This This chemical chemical change change results results in in the the formation formation of of lightlight and heat.
and heat.
3.
3. When When fruit fruit does does this, this, it it is is a a chemical chemical change change ofof the matter.
the matter.
4.
4. Matter Matter changes, changes, and and its its properties properties and and makeupmakeup also change.
also change.
5.
5. A A combination combination of of mattermatter, , such such as as salt salt waterwater, , in in whichwhich the makeup remains the same
the makeup remains the same 6.
6. The The building building blocks blocks of of mattermatter 7
7.. This This occurs occurs when when iron iron materials materials are are left left outside outside andand undergo a chemical change.
undergo a chemical change.
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Chapter 6 • 125
Chapter 6 • Matter Matter Use Use withwithLesson 3Lesson 3 Reading
Reading and and Writing Writing in in Science Science Changing Changing MatterMatter
Cloze Test Cloze Test
Changing Matter Changing Matter
chemical
chemical change change light light matter matter newnew gas
gas makeup makeup melts melts physical physical changechange
Fill in the blanks.
Fill in the blanks.
Every day, we see matter change. For example, if you tear a piece Every day, we see matter change. For example, if you tear a piece of
of paper, paper, the the paper paper undergoes undergoes a a . . TheThe
and properties of the matter do not change.
and properties of the matter do not change.
Another physical change that we can see is when an ice cube Another physical change that we can see is when an ice cube
.
. A A causes causes aa
substance to be made. When a log burns, the substance to be made. When a log burns, the ashes that are formed are a different type of
ashes that are formed are a different type of
than the original wood. There are many ways to observe that a than the original wood. There are many ways to observe that a
chemical change has occurred in matter. For example, when we see a chemical change has occurred in matter. For example, when we see a piece
piece of of paper paper burning, burning, we we see see and and feel feel heat.heat.
Color change is another observation. Finally, if you see a Color change is another observation. Finally, if you see a
released, you know that a chemical change released, you know that a chemical change has occurred. These changes in the matter indicate that the
has occurred. These changes in the matter indicate that the substance is now a new type of matter.
substance is now a new type of matter. © ©
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126 Chapter 6 •Chapter 6 • Matter Matter Use Use withwithLesson 3Lesson 3 Reading
Reading and and Writing Writing in in Science Science Changing Changing MatterMatter
Vocabulary
b. liquids. liquids. d.d. solids. solids.
2.
c. is the is the smallest unit of smallest unit of an element.an element.
d.
d. only experiences physical changes. only experiences physical changes.
3.
3. The building The building blocks of blocks of matter matter areare bestbest described as described as a.
a. elements. elements. c.c. mass. mass.
b.
b. gases. gases. d.d. solids. solids.
4.
4. Which of Which of the follothe following showwing shows that s that a chemical changea chemical change has happened?
has happened?
a.
a. a ta torn sheet orn sheet of paperof paper b.
b. a piece oa piece of spoiled fruitf spoiled fruit c.
c. water water freezing intfreezing into iceo ice d.
d. a mixture of ta mixture of tea and watea and waterer 5.
5. When When ice ice melts, watmelts, water becer becomesomes a.
a. a gas. a gas. c.c. a a solid.solid.
b.
b. a liquid. a liquid. d.d. a powder. a powder.
6.
Chapter 6 • MatterMatter Chapter Vocabulary TestChapter Vocabulary Test Reading and Writing in Science
Reading and Writing in Science
7
7.. A A liquid liquid hashas a.
a. definite definite shape and shape and volume.volume.
b.
b. no definite no definite shape or vshape or volume.olume.
c.
c. definite definite shape.shape.
d.
d. definite volume. definite volume.
8.
8. When a When a liquid gains liquid gains heat energy heat energy it canit can a.
a. condense. condense. c.c. freeze. freeze.
b.
b. evaporate. evaporate. d.d. melt. melt.
9.
9. Which of tWhich of the following he following is NOT is NOT a phya physical change in matter?sical change in matter?
a.
a. A new A new substance was substance was formed after a formed after a reaction.reaction.
b.
b. Matter changed from a Matter changed from a liquid to liquid to a solid.a solid.
c.
c. Matter formed Matter formed a gas when a gas when heat energy wheat energy was added.as added.
d.
d. Substances have tSubstances have the same properties after they are mixed.he same properties after they are mixed.
10.
10. What What has happened has happened when cwhen condensing occursondensing occurs?? a.
a. Heat was Heat was added to added to a solid.a solid.
b.
b. Heat was added tHeat was added to a liquid.o a liquid.
c.
c. A gas A gas has lost heat has lost heat energy.energy.
d.
d. A solid has lost heat A solid has lost heat energy.energy.
11.
11. The periodic table is a chart that shows a list of The periodic table is a chart that shows a list of a.
a. atoms. atoms. c.c. only only gases.gases.
b.
b. elements. elements. d.d. only solids. only solids.
Vocabulary Vocabulary
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Name
Name DateDate
Chapter 6 •
Chapter 6 • MatterMatter Chapter Vocabulary TestChapter Vocabulary Test Reading and Writing in Science
Reading and Writing in Science
Concept Map Concept Map
Energy Energy
Complete the concept map with the information you learned Complete the concept map with the information you learned about energy. Some answers have been written for you.
about energy. Some answers have been written for you.
Energy Energy
Types Types kinetic
kinetic
F
Foorrmmss MMoovveemmeenntt potential
potential
c
chheemmiiccaall mmeecchhaanniiccaall
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Name DateDate
Chapter 7 •
Chapter 7 • Energy Energy Use Use withwithChapter 7Chapter 7 Reading and Writing in Science
Reading and Writing in Science