QUIZZIZ UNIT 3 REMEDIATION ACTIVITY

Emma uses litmus paper to determine whether five unknown solutions are acids or bases. The litmus paper turns red when the pH is 4.5 or below and blue when the pH is 8.2 or above. Emma records the results in the data table. Emma accidentally spills a beaker of an unknown solution. It splashes onto the strip she used to test Solution 1, and the strip turns from red to blue. Based on this observation, which conclusion could Emma make about the solution that she spilled?

• The solution spilled on the strip must be neutral.

• The solution spilled on the strip must have a basic pH.

• The solution spilled on the strip must have a pH lower than 5.

• The solution spilled on the strip must have the same pH as solution 1.

Tags

NGSS.MS-PS1-2

Mason and Abigail are studying mixtures and their melting points. They learn that mixtures typically melt at different temperatures than the pure substances they are composed of. Brass, a mixture composed of copper and zinc, melts at temperatures between 820 degrees Celsius (°C) and 1030 degrees Celsius (°C). Why might different samples of brass melt at different temperatures?

• The samples are different in size and in volume.

• The samples have different shapes and masses.

• The samples are composed of different proportions of copper and zinc.

• The samples have the same amounts of copper and zinc melting at different temperatures.

Tags

NGSS.MS-PS3-4

A biology class is studying the effect of sunlight on plant growth. They divide into four groups, each assigned a different section of the school garden. Each group measures the height of plants in their section once a week for a month. The data is compiled into a table for analysis. Student A: Group 3's data should be ignored because it doesn't align with the other groups' results. Student B: There might be a factor in the garden affecting plant growth, and the class should investigate further. Student C: The plants in Group 3's section are likely receiving more sunlight, leading to their increased growth. Student D: The measurements in Group 1's section should be repeated due to inconsistent results.

• Student A: Group 3's data should be ignored because it doesn't align with the other groups' results.

• Student B: There might be a factor in the garden affecting plant growth, and the class should investigate further.

• Student C: The plants in Group 3's section are likely receiving more sunlight, leading to their increased growth.

• Student D: The measurements in Group 1's section should be repeated due to inconsistent results.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

At a Halloween party, Abigail and Rohan noticed that the dry ice underwent a phase change. Which statement below best describes the change in the energy and physical characteristics of the molecules of carbon dioxide during this process?

• The molecules experienced a physical change from a gaseous state to a liquid state, releasing energy into the environment and reducing the molecular movement.

• The molecules experienced a chemical change as the carbon dioxide reacted with oxygen, which released oxygen gas into the environment and increased the molecular movement.

• The molecules experienced a physical change from a solid state to a gaseous state, which increased the molecular movement and the energy of the carbon dioxide molecules.

• The molecules experienced a chemical change from a liquid state to a solid state, which reduced the amount of energy between the carbon dioxide molecules and decreased the molecular movement.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Sarah is preparing a special dessert for a family gathering. She mixes flour, sugar, and eggs to create a batter, which she then pours into a mold and bakes for 30 minutes. While the dessert is baking, she blends cream, vanilla, and sugar to make a topping. What type of changes occur in the dessert and the topping?

• Both the topping and the dessert are formed by physical changes.

• Both the topping and the dessert are formed by chemical changes.

• The topping is formed by a chemical change and the dessert is formed by a physical change.

• The dessert is formed by a chemical change and the topping is formed by a physical change.

Tags

NGSS.MS-PS1-2

Noah is preparing a salad and wonders which is the best example and explanation that a physical change has occurred?

• fireworks exploding, because energy is released as light and heat

• gasoline burning, because it forms water vapor and carbon dioxide

• crushing an ice cube, because the chemical structure of the ice cube is changed

• dicing potatoes, because the molecules are separated but remain the same substance

Priya, a chemistry student, conducted several different procedures. Which of the following procedures best demonstrates the law of conservation of mass?

• using filter paper to separate 2 grams of solid powder from 10 grams of water

• burning 2 kilograms of wood from a pine tree leaves 0.4 kilogram of ash and soot

• evaporating sugar water leaves 5 grams of sugar and turns the water into water vapor

• combining 2 grams of copper and 4 grams of sulfur to make 6 grams of copper sulfate

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Scarlett added a silvery white metal to a beaker of cold water and noticed that gas bubbles were given off and a different substance formed. When she repeated the activity with hot water she noticed the gas bubbles were released much more rapidly. Which statement best explains why the reaction occurred faster in hot water?

• Hot water increases the collision rate of the molecules, causing the reaction to occur faster.

• Hot water changes the concentration of the chemicals, causing the reaction to occur faster.

• Hot water increases the surface area of the molecules, causing the reaction to occur faster.

• Hot water changes the chemical composition of the water molecules, causing the reaction to occur faster.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

During a laboratory experiment, Sam and Taylor measure the mass of Compound A and Compound B separately. They then combine the compounds in a container, resulting in a reaction. After the reaction, they measure the mass and find it to be 20 grams. They repeat the experiment twice with consistent results. What is the most likely explanation for this observation?

• The compounds underwent a chemical reaction, and some mass was converted into energy.

• The compounds underwent a physical change, and some mass was lost as heat.

• The compounds underwent a chemical reaction, and some mass was released as a gas.

• The compounds underwent a physical change, forming a new, denser mixture.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The diagram below shows three containers of gas. Which list correctly describes the gases in containers R, S, and T?

• R = element, S = compound, T = mixture

• R = compound, S = element, T = mixture

• R = element, S = mixture, T = compound

• R = mixture, S = element, T = compound

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2