Leap Science

What happens if we didn't have leap years?

• The calendar year would be shorter than the solar year

• The calendar year would be longer than the solar year

• There would be no effect on the calendar or seasons

• The seasons would shift over time

Tags

NGSS.MS-ESS1-1

Lamar is studying water quality in his science class. He learns that salt water is seeping into his neighboring town’s water supply and makes the water dangerous to drink. Lamar’s teacher challenges his class to investigate ways to identify salt water without tasting it. Part B: What measurements can Lamar take before he conducts his investigation in Part A to provide evidence of which cup contained the salt water?

• Find the volume of both liquids to see which one took up the most space.

• Measure the temperature of each liquid to provide evidence that a chemical change had taken place.

• Measure the mass of each cup to see which one had the most matter.

• Use a photometer to observe which cup had the most salt conductivity.

Tags

NGSS.MS-PS1-2

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

Gas Particles Angela studies three different types of matter in her science class. She claims that air is a gas made of particles too small to be seen. Which two examples provide evidence to support Angela’s claim that gases are made of particles too small to be seen? Select the two correct answers.

• Bubbles in boiling water

• Ice cream melting in a bowl

• Snow forming in clouds

• Melted lava hardening into rock

• A kite floating in the sky

What is the primary reason for adding a leap year to the calendar?

• To align the calendar year with the solar year

• To make the calendar year longer

• To adjust for the lunar cycle

• To correct the time zones

Which of the following is a consequence of not having leap years?

• The calendar would remain accurate

• The seasons would gradually shift

• The length of a day would change

• The moon phases would be affected

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

• Every 2 years

• Every 4 years

• Every 5 years

• Every 10 years

What is the scientific term for the time it takes Earth to complete one orbit around the Sun?

• Sidereal year

• Lunar year

• Solar year

• Galactic year

Tags

NGSS.MS-ESS1-2

Which experiment can demonstrate the concept of leap years?

• Measuring the length of a shadow at noon over a year

• Observing the phases of the moon

• Tracking the position of a star over a month

• Recording daily temperature changes

Tags

NGSS.MS-ESS1-1

What is the effect of leap years on the timing of equinoxes and solstices?

• They remain fixed each year

• They gradually shift without leap years

• They occur twice a year

• They are unaffected by leap years