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Sample Question of the Day
Question:
Which of the following statements accurately describe the role of the sun and gravity in the water cycle on Earth?
Answer Choices:
- A) The sun provides energy that causes water to evaporate from Earth's surface.
- B) Gravity pulls precipitation down to Earth's surface, completing the cycle.
- C) The sun's energy is responsible for causing gravity to act on water droplets.
- D) Without the sun, water would not be able to condense into clouds.
- E) Gravity helps in the formation of clouds by holding water vapor in place.
💡 Explanation:
- The sun's energy heats water in oceans, rivers, and lakes, causing it to evaporate into water vapor.
- Gravity is responsible for pulling water back to Earth's surface as precipitation, ensuring the continuous cycling of water.
- The sun does not directly influence gravity, and gravity does not hold water vapor in place; rather, it pulls precipitation down.
Standard: MS-ESS2-4 | DOK: 2
Recent Questions
Question:
Which of the following statements correctly describe the concepts of unions, intersections, and complements in probability? Select all that apply.
Answer Choices:
- A) The union of two events includes all outcomes that are in either event.
- B) The intersection of two events includes only outcomes that are in both events.
- C) The complement of an event includes all outcomes that are not in the event.
- D) The intersection of two events includes all outcomes that are in either of the events.
- E) The union of two events includes only outcomes that are in both events.
💡 Explanation:
In probability, the union of two events A and B (written as A ∪ B) includes all outcomes that are in either A, B, or both.
The intersection of two events A and B (written as A ∩ B) includes only the outcomes that are in both A and B.
The complement of an event A includes all outcomes in the sample space that are not in A.
Standard: S.CP.A.1 | DOK: 1
Question:
How do specific animal behaviors and plant structures impact reproduction success?
Answer Choices:
- A) Animal behaviors such as nest building or elaborate mating dances increase reproduction success by [Select]
- B) Plant structures like brightly colored flowers enhance reproduction success by [Select]
💡 Explanation:
- Animal behaviors like nest building or mating dances attract mates or protect offspring, thereby increasing the chances of successful reproduction.
- Similarly, specialized plant structures like brightly colored flowers attract pollinators, which are essential for the transfer of pollen and successful plant reproduction.
Standard: MS-LS1-4 | DOK: 3
Question:
Consider the circle in the coordinate plane with the center at (h, k) and radius r. The equation of the circle is given by (x - h)^2 + (y - k)^2 = r^2. If the equation of a circle is given as x^2 + y^2 - 6x + 4y - 12 = 0, use the method of completing the square to find the center and radius of the circle. Select the correct values from the dropdowns.
Answer Choices:
- A) Center: (3, -2); Radius: 5
- B) Center: (3, -2); Radius: 4
- C) Center: (2, -3); Radius: 5
- D) Center: (2, -3); Radius: 4
💡 Explanation:
To find the center and radius, we rewrite the given circle equation by completing the square.
Start with the equation x^2 + y^2 - 6x + 4y - 12 = 0.
\n\nFirst, complete the square for x: \n\n1.
Group the x terms: (x^2 - 6x)\n2.
Take half of -6, which is -3, and square it to get 9.
Add 9 and subtract 9 to the equation: (x^2 - 6x + 9 - 9)\n3.
Rewrite as: ((x - 3)^2 - 9)\n\nNext, complete the square for y:\n\n1.
Group the y terms: (y^2 + 4y)\n2.
Take half of 4, which is 2, and square it to get 4.
Add 4 and subtract 4 to the equation: (y^2 + 4y + 4 - 4)\n3.
Rewrite as: ((y + 2)^2 - 4)\n\nCombine these results:\n\n(x - 3)^2 - 9 + (y + 2)^2 - 4 = 12\n\nSimplify:\n\n(x - 3)^2 + (y + 2)^2 = 25\n\nThis equation is in the standard form (x - h)^2 + (y - k)^2 = r^2, where the center is (h, k) = (3, -2) and the radius r = √25 = 5.
Standard: G.GPE.A.1 | DOK: 4
Question:
A gardener is planting flowers in a garden. She has a total of 72 flowers and wants to plant them equally in several rows. If each row can hold a certain number of flowers, and she ends up with a total of 9 rows, how many flowers does she plant in each row? Solve for x in the equation 9x = 72.
Answer Choices:
- A) 9
- B) 8
- C) 7
- D) 6
💡 Explanation:
To find out how many flowers are planted in each row, set up the equation 9x = 72, where x represents the number of flowers per row.
Solving for x gives x = 72 / 9 = 8.
Thus, the gardener plants 8 flowers in each row.
Standard: 6.EE.B.7 | DOK: 3
Question:
Identify a public policy issue at the local, state, or national level that you feel strongly about. Propose a position regarding this issue and provide at least two reasons to defend your position. Consider how this issue affects individuals and communities.
💡 Explanation:
- The question requires students to engage with a public policy issue, formulate a stance, and defend it with reasoned arguments.
- This aligns with the standard as it encourages students to think critically about civic issues and articulate their views.
Standard: 6.3.8.CivicsPD.2 | DOK: 2
Question:
A science class conducted an experiment in which they mixed vinegar with baking soda in a sealed container. Before the reaction, the students measured the mass of the container with the vinegar and baking soda as 150 grams. After the reaction, they observed the formation of a gas, and the mass of the container was still 150 grams. Analyze and interpret these observations to determine whether a chemical reaction occurred. Provide evidence from the experiment to support your conclusion.
💡 Explanation:
- The formation of a gas and the change in properties of the substances from vinegar and baking soda to new products suggest a chemical reaction.
- The law of conservation of mass supports that the total mass remains the same in a closed system, even though the substances' properties change.
Standard: MS-PS1-2 | DOK: 4