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- 1. Multiple Choice
Two identical containers each hold one liter of water. One container is kept at room temperature as a liquid. The other container is placed in a freezer and kept as a solid. Which property is MOST likely to be the same in both states of matter?
density
mass
shape
volume
- 2. Multiple Choice
Using a closed system, a student heats 100 milliliters (mL) of distilled water in a flask. The steam from the water is captured, cooled, and condensed as shown in the diagram. How much water is MOST likely collected?
1mL
10mL
100mL
110mL
- 3. Multiple Choice
A student wrapped a wire around an iron nail and connected the wire to a battery. The nail became magnetized, as shown in Diagram 1. When the battery was disconnected, the nail was no longer magnetized, as shown in Diagram 2. Which statement BEST describes what occurred during this investigation?
A new property was acquired when the nail became magnetized and caused a chemical change in the nail.
When the nail became magnetized the iron atoms in the nail were temporarily aligned and caused a physical change.
The electric current passing through the wires heated the nail and caused the nail to undergo a chemical change.
The electric current passing through nail temporarily changed the iron atoms into another substance and caused a physical change.
- 4. Multiple Choice
The drawing shows solid carbon dioxide changing into carbon dioxide gas. Which statement describes the relationship between the solid carbon dioxide and the carbon dioxide gas after all of the solid has changed to gas?
They have the same volume
The gas has less volume than the solid
The gas has less mass than the solid
They have the same mass
- 5. Multiple Choice
A group of students observed the formation of bubbles when water boiled. What happened to matter because of the physical change to the water?
New matter was created in the bubbles.
Old matter was destroyed as the water turned to gas.
Matter was conserved when it changed form.
The composition of the matter changed.
- 6. Multiple Choice
This general chemical equation shows an example of energy availability in a theoretical reaction. Which statement is true about the equation?
Energy was released.
The equation is missing reactants.
Energy was absorbed.
The equation is missing products.
- 7. Multiple Choice
During photosynthesis, carbon dioxide and water combine according to the general equation:
Why is photosynthesis a chemical reaction?
because new substances are formed
because an input of energy is required
because the reactants are compounds
because the products include an element
- 8. Multiple Choice
A student kept a notebook during an investigation. Which recorded observation was MOST likely a physical change?
frying an egg
baking a cake
toasting bread
melting butter
- 9. Multiple Choice
John and Lisa collected a sample of ocean water and placed it in a jar. Within a couple of days, the water had evaporated and salt was visible at the bottom of the jar. This is an example of a
physical change
chemical change
solute being dissolved
a new substance being fromed
- 10. Multiple Choice
A chemist observed bubbling and fizzing after adding an acid solution to a white powdery substance in a beaker. Which of the following can be inferred?
the acid and powder formed a new product.
The acid boiled when poured into the beaker.
A physical reaction produced a gas mixture.
A reaction occurred that produced heat.
- 11. Multiple Choice
As part of a study, a scientist observed a number of different molecular changes in matter. Which of the following observations provides evidence of a physical change?
only a physical change occurred.
only a loss of mass occurred
a chemical change occurred.
the formation of an element occurred.
- 12. Multiple Choice
Students performed an investigation on how aluminum cans taken to a recycle center were able to be reused. They found out an aluminum can undergoes which type of change?
a physical change because the can is heated
a chemical change because new metal is formed
a chemical change because an old can is changed into a new can
a physical change because the material remains the same
- 13. Multiple Choice
Mixing baking soda and vinegar makes the temperature of the solution decrease and release carbon dioxide. Which conclusion about this investigation is NOT valid?
Mixing the chemicals caused them to absorb heat.
New elements were formed.
A chemical reaction took place.
The procedure caused a gas to be formed.
- 14. Multiple ChoiceWhat is needed to change ice into water?airenergystirringchemicals
- 15. Multiple ChoiceWhich best represents a physical change?bubblingcondensationformation of a precipitateformation of a new substance
- 16. Multiple ChoiceWhich best demonstrates a physical change?change in temperatureformation of a gaschange in state
- 17. Multiple ChoiceWhat is the best evidence for a chemical reaction?color changecutting a metalchange of state
- 18. Multiple ChoiceWhen baking soda and vinegar react, the product includes bubbles. Whathas most likely occurred?gas formationexothermic reactionprecipitate formation
- 19. Multiple ChoiceWhat chemical reaction results in the formation of a solid?acid base reactionendothermicprecipitate
- 20. Multiple Choice
When baking soda and vinegar react, the product includes bubbles. Whathas most likely occurred?
gas formation
exothermic reaction
precipitate formation
- 21. Multiple ChoiceWhat kind of properties can only be observed when a substance changes into a different substance?physical propertieschemical propertiesliquid propertiesreal properties
- 22. Multiple ChoiceIs hammering wood together to build a house a chemical or physical change?chemicalphysical
- 23. Multiple ChoiceWhich of the following is NOT an example of a physical change?crumpled paperpencil sharpeningshrunken clothingsour milk
- 24. Multiple ChoiceWhich is a chemical change?freezing fruit juiceslicing a potatoboiling watercopper metal turning green
- 25. Multiple Choicewhat is burning?physical changephysical propertychemical changechemical property
- 26. Multiple Choicea rusting bicyclephysical changechemical change
- 27. Multiple ChoiceOne cup of water is left outside for two days when it was checked there was only half a cup left. What happened?evaporation; chemical changecondensation; physical changeevaporation; physical changecondensation; chemical change
- 28. Multiple Choicehydrochloric acid reacts with magnesium to produce hydrogen gassphysical changechemical change
- 29. Multiple Choice
A chemist observed bubbling and fizzing after adding an acid solution to a white powdery substance in a beaker. Which of the following can be inferred?
the acid and powder formed a new product.
The acid boiled when poured into the beaker.
A physical reaction produced a gas mixture.
A reaction occurred that produced heat.
- 30. Multiple Choice
Mixing baking soda and vinegar makes the temperature of the solution decrease and release carbon dioxide. Which conclusion about this investigation is NOT valid?
Mixing the chemicals caused them to absorb heat.
New elements were formed.
A chemical reaction took place.
The procedure caused a gas to be formed.
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