
8.1 and 8.2 Atoms and Reactions

Quiz
•
Science
•
8th Grade
•
Hard
+3
Standards-aligned
John Tilert
Used 3+ times
FREE Resource
14 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
3 mins • 4 pts
PS1-1: The model shown represents one molecule of hydrazine, a chemical in rocket fuel. The black spheres represent nitrogen atoms, and the white spheres represent hydrogen atoms. Based on the model, what is the atomic composition of hydrazine?
1 atom of nitrogen and 1 atom of hydrogen
4 atoms of nitrogen and 2 atoms of hydrogen
2 atoms of nitrogen and 2 atoms of hydrogen
2 atoms of nitrogen and 4 atoms of hydrogen
Tags
MS-PS1-1
2.
MULTIPLE CHOICE QUESTION
3 mins • 4 pts
PS1-2: A solid, yellow substance formed when Mr. Simon poured two colorless liquids together at room temperature. Which statement best explains why this demonstrates a chemical reaction?
The color of the liquids changed to yellow.
One of the liquids dissolved in the other liquid.
One of the liquids changed from a liquid to a solid.
The yellow substance is a solid at room temperature.
Tags
MS-PS1-2
3.
MULTIPLE CHOICE QUESTION
3 mins • 4 pts
PS1-5: A chemical reaction between two molecules of hydrogen gas (H2) and one molecule of oxygen gas (O2) forms two molecules of water (H2O). Caitlin makes a model to represent this reaction. In her model, gray circles represent hydrogen atoms and white circles represent oxygen atoms, as shown. Caitlin’s model has an error. What can Caitlin do to correct her model?
Erase a hydrogen atom from the reactant molecule that has two hydrogen atoms.
Add another hydrogen atom to the product molecule that has one hydrogen atom.
Change the reactants to three molecules of one hydrogen atom and one oxygen atom.
Change the product to one molecule of four hydrogen atoms and two oxygen atoms.
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MS-PS1-5
4.
MULTIPLE CHOICE QUESTION
3 mins • 4 pts
PS1-6: A kerosene lantern is a lighting device. It uses kerosene as fuel. The kerosene is in the base of the lantern, and a wick soaks up the kerosene. Air can flow into the lantern through holes in the lantern.
The diagram shows a kerosene lantern. When the wick is lit, the kerosene in the wick goes through a chemical reaction with oxygen in the air to release energy in the form of light.
How could you increase the amount of time the lantern gives light?
Increase the size of the base to hold more kerosene.
Change the shape of the flame to give off more light.
Increase the size of the air holes to allow more air flow.
Change the material of the wick to soak up more kerosene.
Tags
MS-PS1-6
5.
OPEN ENDED QUESTION
10 mins • 4 pts
PS 1-1: The table shows models of four molecules and lists the atoms of each molecule.
Based on the information in the table, What are the atoms that make up methane, and how many of each atom are there?
How do you know? (Hint: Talk about the other molecules in the table. "I know this because Oxygen gas has...")
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MS-PS1-1
6.
OPEN ENDED QUESTION
10 mins • 4 pts
PS1-5: Substance X and Substance Y chemically react as shown in the model.
The products of this reaction are four molecules of the same compound.
a. How does the mass of the products compare to the mass of the reactants? Explain your reasoning.
b. Describe the number of atoms of X and the number of atoms of Y that make up ONE molecule of the product. Explain your reasoning.
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7.
OPEN ENDED QUESTION
10 mins • 4 pts
PS1-6: People use hot air balloons to rise high above the ground and be pushed by air currents from one place to
another. The diagram shows a hot air balloon. A type of chemical reaction, called combustion, takes place between propane and oxygen in the burners.
a. Describe what the chemical reaction produces that causes a hot air balloon to rise.
b. Describe something about what would prevent the hot air balloon from traveling far. Explain your reasoning.
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