Experiments
More Experiments
States of Matter
Chemical and Physical Change
Wild Card
100
Vinegar is an acid that bubbles when it interacts with calcite. Which of the above minerals contains calcite?
limestone
100
Which investigation would provide evidence of a chemical change?
a) Put an antacid tablet in water, and when the antacid and water mix, observe the bubbles that form as a new substance is created.
b) Spray perfume into the air, and when the air and perfume mix, observe the change in odor that happens as they mix.
c) Heat water in a pan on a stove, and observe the steam that forms as the state of matter of the water changes.
d) Blow air through a wand filled with soap solution, and observe the bubbles that form as the air becomes trapped.
a) Put an antacid tablet in water, and when the antacid and water mix, observe the bubbles that form as a new substance is created.
100
Is a ROCK a solid, liquid, or gas?
SOLID
100
Is this a physical or chemical change?
Mrs. Hoover puts hot chocolate mix in her water. She watches it dissolve.
Chemical change.
100
Two solutions are added together and the new solution becomes hot. What does this tell you?
a) A gas is being produced.
b) The solutions are not soluble.
c) The physical properties are the same.
d) A chemical change is taking place
d) A chemical change is taking place
200
Laila empties her piggy bank and finds ten dull, brown pennies. Laila wants her pennies to look shiny, so she performs an experiment. First, she pours salt and vinegar into a container. Then, she adds the ten pennies and waits a few minutes. When she takes the pennies out of the salt and vinegar solution, they look shiny and new!
If Laila weighs the salt and vinegar solution and the pennies after the experiment, what do you think she will find?
a. The solution will weigh less and the pennies will weigh more after the experiment.
b. The solution will weigh more and the pennies will weigh less after the experiment.
c. The solution will weigh the same and the pennies will weigh the same after the experiment.
d. The solution will weigh the same and the pennies will weigh less after the experiment.
b. The solution will weigh more and the pennies will weigh less after the experiment.
200
A teacher takes a tray of ice cubes out of the freezer. Each student takes an ice cube and holds it in their hands. They make the observations listed in the chart. The student claims that changing the temperature of the water causes a physical change that turns water into ice.
Which argument BEST supports the student’s claim?
c) The ice cube is melting in the student’s hand since the hands are much warmer than the ice. Heat is being added to the ice, which causes the particles to move faster.
a) The ice cube is freezing in the student’s hand since the hands are much warmer than the ice. Heat is being removed from the ice, which causes the particles to move slower.
c) The ice cube is melting in the student’s hand since the hands are much warmer than the ice. Heat is being added to the ice, which causes the particles to move faster.
d) The ice cube is melting in the student’s hand since the state is changing from a liquid to a solid. Heat is being added to the ice, which causes the particles to move slower.
c) The ice cube is melting in the student’s hand since the hands are much warmer than the ice. Heat is being added to the ice, which causes the particles to move faster.
200
Are OXYGEN, HELIUM, and WATER VAPOR solids, liquids, or gases?
Gases
200
Is this a physical or chemical change?
Mom mixed oil and vinegar to make a salad dressing. Then, she added sugar and a little lemon juice.
Physical change
200
Bread placed in a toaster turns brown then black if left too long. What is needed for this chemical change to take place?
a) Heat energy had to be taken away.
b) Heat energy had to be added.
c) A certain amount of time had to pass.
d) The bread had to be taken out of the wrapper.
b) Heat energy had to be added.
300
Jessica drops a cup of baking soda into a glass container that has vinegar at the bottom of it. Then, she quickly puts a balloon on top of the container. What do you predict will happen to the balloon?
a. The balloon will get bigger because it will become filled with solid (baking soda) particles that are too small to be seen.
b. The balloon will get bigger because it will become filled with liquid (vinegar) particles that are too small to be seen.
c. The balloon will stay the same because it will not become filled with anything
d. The balloon will get bigger because it will become filled with gas particles that are too small to be seen.
d. The balloon will get bigger because it will become filled with gas particles that are too small to be seen.
300
Pictures of water in the three different states are shown below. The ice cold water in Picture 1 has been left out at room temperature and the pan of hot water in Picture 2 is on a hot stove.
Describe why the water is changing from one state to another state in each picture.
Be sure to name the two states of water involved and how they are changing.
Picture 1- solid to liquid- melting
Picture 2-liquid to gas- evaporation
Picture 3- liquid to solid- freezing
300
Are COFFEE and MILK solids, liquids, or gas?
Liquids
300
Is this a physical or chemical change?
After the party, our family left the fruit out too long. The rotten fruit created a terrible smell.
Chemical change
300
Which statement is TRUE?
a) Physical change only changes the mass.
b) Physical changes begin and end with the same matter.
c) Physical change only changes the size.
d) Physical changes change the matter into something totally different
b) Physical changes begin and end with the same matter.
400
What type of change occurred? How do you know?
A chemical change. A match is used to light and burn.
400
A student fills a tray with water and places the tray in the freezer. Three hours later, the student removes the tray from the freezer and makes observations.
Student Observations
The water is solid.
The water does not flow.
The water keeps its shape in any container.
The color of the water has changed to white.
The student claims that changing the temperature of the water causes a physical change that turns water into ice.
Fill in the blanks that would make sense:
Ice forms because heat is ______ (added or removed) causing the particles that make up the ice to move ______ (faster or slower). This (makes the ice change shape, changes the water from a liquid to a solid, or changes the color of the water from clear to white).
1-removed
2-slower
3- changes the water from a liquid to a solid
400
Evaporation happens when the sun _____ ______ water and turns it into vapor.
Heats up
400
When a candle burns a chemical change is happening. What could you do to a candle that would cause a PHYSICAL change? Justify your answer with an explanation of why your answer is a physical change and not a chemical change.
Possible answers: Breaking, slicing, cutting, or melting the candle
400
A student is investigating chemical changes by using different materials. Which investigation would provide evidence of a chemical change and why?
a) Melting a solid with fire would provide evidence of a chemical change because the solid would change shape.
b) Cutting cardboard into many smaller pieces would provide evidence of a chemical change because the pieces cannot be put back together.
c) Placing a solid into hot water and stirring while the solid dissolves would provide evidence of a chemical change because the dissolved material is lost.
d) Combining two liquids that give off heat and gas would provide evidence of a chemical change because the particles react to make a new material with different properties.
d) Combining two liquids that give off heat and gas would provide evidence of a chemical change because the particles react to make a new material with different properties.
500
Students are investigating chemical changes that occur in different materials.
Which TWO investigations would provide evidence of a chemical change?
Placing a liquid in a freezer until the liquid becomes a solid would provide evidence of a chemical change because the state of matter changes.
Using a saw to cut a solid into two different pieces would provide evidence of a chemical change because the pieces cannot be put back together.
Using a hot plate to heat a solid until it changes color and releases an odor would provide evidence of a chemical change because the particles cannot be changed back.
Placing two different liquids together in a beaker and observing that a solid forms when they mix would provide evidence of a chemical change because a new material is formed.
Placing a mixture containing a solid and a liquid on a windowsill and letting the liquid evaporate would provide evidence of a chemical change because the evaporated material is lost.
Using a magnet to remove a magnetic solid from a mixture that also contains nonmagnetic solids would provide evidence of a chemical change because the mixture cannot be mixed together again.
3. Using a hot plate to heat a solid until it changes color and releases an odor would provide evidence of a chemical change because the particles cannot be changed back.
4. Placing two different liquids together in a beaker and observing that a solid forms when they mix would provide evidence of a chemical change because a new material is formed.
500
Complete the steps with words to fill in the blank:
Step 1. Separate the glass marbles from the mixture by removing them with a fork.
Step 2. Separate the _______ (sand or sugar) from the mixture by _________ (using a magnet to lift it out, setting the jar in sunlight and letting the water evaporate, or pouring the mixture through filter paper into a different container).
Step 3. Separate the _________ (sand or sugar) from the mixture by _______(using a magnet to lift it out, setting the jar in sunlight and letting the water evaporate, or pouring the mixture through filter paper into a different container).
Step 2- 1-sand 2-filter
Step 3- 1-sugar, 2-setting the jar in sunlight
500
Is a CLOUD a solid, liquid, or gas?
Gas- clouds are just water vapor (which is a gaseous state of water)
500
Describe an example of matter going through a chemical change. Explain your answer by listing a sign or clue that tells us that a chemical change has occurred.
Teacher will check.
500
Describe an example of matter going through a physical change. Explain your answer by listing a sign or clue that tells us that a physical change has occurred.
Teacher will check.