How many non-native marine species were found in Galápagos islands?

Grade level: 6th grades

Skills: Percentage and addition

sRelated environmental issues: Biodiversity

The Galápagos islands, which lie in the equatorial Pacific, have long been recognized for their remarkable biodiversity and their large number of endemic species.  However,  the environment of the Galápagos islands started to change because many non-native species have been brought to the islands by human activity over the last 500 years.

galapagos-islands1.jpg

A recent research identified 53 non-native marine species in the islands.

  1. The research showed that 93% of the 53 species were likely brought to the Galápagos Islands by ships. How many non-native marine species were brought by ships? Round to the nearest whole number.
  1. The Galápagos islands were first visited by Europeans in the 1500s. By the late 1960s, 2000–3000 people lived on the Islands. In a 2010, there were 25,000 residents and one-quarter million visitors annually. Together, how many residents and tourists a year are there in the Galápagos islands?

 

Answer keys

  1. 49 species (53 x 0.93 = 49.29)
  2. 275,000 (25,000 + 250,000= 275,000)

 

How do you get sick because of air in your house?

Grade level:  3rd- 5th grades

Skills: Addison and subtraction

Related environmental issues: Air 

Luckily, we don’t have anybody who die because of the air in your house (household air pollution) in the United States. However, many people around the world get sick and even die because of household air pollution. One out of 6 people in the world doesn’t have electrity and burns wood or coal in their house for cooking and heating instead. Breading harmful smoke from burning materials inside the house damages their health.

Screen Shot 2019-03-01 at 11.05.41 AM

1. In the Philippines, Asia, 47,676 men and 39,003 female unfortunately died because of household air pollution in 2016 alone. How many deaths did the Philippines have due to household air pollution?

Screen Shot 2019-03-01 at 11.00.09 AM

 

2. In the same year, 37,461 deaths occurred because of car crashes in the United States. How many more or less people died from household air pollution in the Philippines?

Sources:

World Health Organization, Global Health Observatory data respiratory, Death by country

Insurance Institute for Highway Safety, State by State general statistics for 2016

Photo- Science Daily, 2012. Open-fire cooking may affect child cognitive development

 

__________________________________________________________

Answer keys

  1. 47,676 + 39,003 = 86,679
  2. 86,679 – 37,461 = 49,218 more people