| Science (biodiversity) | biodiversity | the variety of living things in an area | bio life + divers different + -ity |
| Science (electricity) | conductor / insulator | a material that lets electricity flow easily (like copper) / one that doesn't (like rubber or plastic) | con- together + duct lead + -or; insul island + -ator |
| Science (flight) | thrust, drag, lift | forces on a flying object: thrust pushes it forward, drag slows it, lift pushes it up | (everyday words with a science meaning) |
| Science (space) | rotation / revolution | Earth spinning on its axis (day and night) / Earth travelling around the Sun (a year) | rot wheel; re- again + volv roll |
| Math | ratio | a comparison of two amounts, like 3 : 2 | (from Latin ratio, reckoning) |
| Math | rate | a comparison of two amounts with different units, like 60 km/h | (per hour, per kilogram...) |
| Math | integer | a whole number or its opposite: ..., −2, −1, 0, 1, 2, ... | in- not + teg touch: untouched, whole |
| Social studies | immigrant | a person who moves to a new country to live | im- (in) + migr move + -ant person |
| Social studies | heritage | traditions, languages and ways of life passed down from earlier generations | herit inherit + -age |
| Social studies | treaty | a formal agreement between nations; in Ontario, many treaties are agreements between First Nations and the Crown that are still in effect today | (from Latin tractare, to handle or deal with) |