Is it OK? – thousands of egg-shaped ice balls covering a beach

Grade level: 3rd-5th grades

Skills: measurement (length/mass)

Related environmental issues: climate change

It was reported that a beach in Finland was covered by thousands of egg-shaped balls of ice in the beginning of November, 2019. Experts said that it is a rare weather phenomenon. They ranged from the size of an egg to the size of a football.

1. The length of an egg is 2 inches. The length is a football is one foot. How many times is an football longer than an egg?

2. The weight of an egg is 2 ounces. The weight of an football is one pound. How many times is an football heavier than an egg?

Source) BBC News, Nov 7, 2019. ‘Ice eggs’ cover Finland beach in rare weather

Answer keys

1. 6 times. (12/2=6)

2. 8 times (16/2=8)


What U.S. company uses that largest amount of solar power?

Grade level: 4th-5th grades

Skills: Comparing numbers / Subtraction (Decimal numbers)

Related environmental issues: Renewable Energy 

Many large companies in the United States have installed solar panels to use renewable energy to meet their energy demand and to become more environmentally sustainable.

The table below shows top 5 companies that use the largest amount of solar power in the United States.

Screen Shot 2019-11-08 at 2.02.19 PM

1. Arrange companies from greatest to least.

2. How much more or less solar power does Target use than Walmart?

3. How much more or less solar power does Amazon use than Apple?

Source) SEIA (Solar Energy Industries Association), 2019. 2018 Solar Means Business Report


Answer keys

1. Apple, Amazon, Target, Walmart, Switch

2. 242.4 – 208.9 = 33.5        33,500 (kilowatts) more solar power

3. 393.3 – 329.8 = 63.5        63,500 (kilowatts) less solar power