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Chemistry STAAR Released Test Questions (6.6C, 6.6D, 6.6E, 7.6A, 7.6B, 7.6C, 8.6E)
Quiz by Jennifer Brian
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A student places ice cubes into a beaker filled with warm water. Which statement BEST identifies and explains the change that will occur to the ice cubes?
An element has these properties:
is ductile
has a shiny luster
is solid at room temperature
is a good conductor of thermal energy
Which element has the properties listed?
A chemical equation is shown.
Which statement correctly compares the number of atoms in the reactant and in the products?
A teacher performs these steps for a class demonstration, and students record their observations.
1. Put a small candle in a candleholder.
2. Light a match.
3. Use the flame from the match to light the candle.
4. Let the candle burn for 5 minutes.
5. Blow out the flame.
6. Let the students examine the candle after it has cooled.
What is an example of a physical change that occurred during the demonstration AND what is an example of a chemical change that occurred during the demonstration?
Matter can undergo physical or chemical changes. Which of these are examples of physical changes?
Select TWO correct answers.
Students examined the properties of five different elements and recorded observations about their properties in the table. Based on the students’ observations, classify each sample as a metal, nonmetal, or metalloid.
Which statement describes an action that most likely resulted in a chemical reaction?
Oxygen and oxygen-containing compounds are involved in many different reactions. Which balanced equation represents a reaction that involves 14 atoms of oxygen?
Which of these observations is an indication that a chemical reaction has occurred?
The chart shows properties of four elements.
Based on these properties, which element is most likely a nonmetal?
Which statements correctly compare metals and nonmetals?
The names and chemical formulas of four substances are shown in the chart.
Which substance listed in the chart is made up of the most atoms?
Students create a table that lists processes observed in nature.
Which process describes only a physical change?
Nitrogen dioxide is a gas that can be generated by emissions from vehicles and factories. It can also be generated by natural sources, such as forest fires, lightning, and microbial activity in soil. The equation for producing nitrogen dioxide is shown below.Â
Which of these provides evidence that a chemical reaction occurs?
Some students in a chemistry lab conducted an investigation in which they added four different solid substances to separate beakers of water. They stirred the mixtures for one minute and then recorded their observations in the table below.
Which substance most likely caused a new substance to be formed when mixed with water?
A scientist performed four investigations using eight different liquids. In each investigation, the scientist combined two of the liquids under a fume hood and recorded observations in the table below.Â
In which investigation is it least likely that the liquids reacted chemically?
