Leap Review

What is a leap year?

• A year with 366 days

• A year with 364 days

• A year with 365 days

• A year with 367 days

Dr. Hoey develops an experiment to investigate how different substances react when they are mixed with water. Before mixing the materials together, she measured the mass and temperature of the substances. During the experiment, Dr. Hoey mixes calcium and water in a glass with a plastic rod. Then, she mixes baking soda and water in a glass with a plastic rod. The results of the experiment are below. Which of the following claims can Dr. Hoey make based on her investigation?

• Solution A is a new substance because after the calcium and water mixed, the temperature increased and the color changed.

• Solution B is a new substance because after the baking soda and water mixed, the solution was cloudy and the temperature remained the same.

• Solution B is a new substance because after the baking soda and water mixed, the mass of the solution is equal to the mass of the baking soda and water before they were mixed.

• Solution A and B are new substances because each solution stayed the same when they were mixed together.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the primary reason for adding a leap day to the calendar every four years?

• To correct the drift between the calendar year and the solar year

• To ensure the seasons remain aligned with the months

• To adjust for the Earth's slowing rotation

• To synchronize the lunar and solar calendars

Which of the following is a scientific concept related to leap years?

• The Earth's axial tilt

• The Earth's orbital eccentricity

• The precession of the equinoxes

• The Earth's revolution around the Sun

Tags

NGSS.MS-ESS1-1

In which month is the leap day added in a leap year?

• January

• February

• March

• April

How often does a leap year occur in the Gregorian calendar?

• Every 2 years

• Every 3 years

• Every 4 years

• Every 5 years

Which of the following is a real-world application of understanding leap years?

• Predicting solar eclipses

• Designing calendars

• Calculating tides

• Forecasting weather patterns

What is the formula to calculate the number of leap years in a given period?

Which experiment could help demonstrate the concept of a leap year?

• Measuring the length of a day over a year

• Tracking the position of the Sun at noon over a year

• Observing the phases of the Moon over a month

• Recording the temperature changes over a year

What is the significance of the year 2000 in the context of leap years?

• It was not a leap year

• It was a leap year

• It was the start of a new millennium

• It was the end of a century