Year 5 Reversible and Irreversible Changes Knowledge Mat
Year 5: Reversible and Irreversible Changes Knowledge Mat Subject Specific Vocabulary solubility Is a chemical property referring to the ability for a given substance, the solute, to dissolve in a solvent. conductivity Conductivity defines a material's ability to conduct electricity. transparency In general, transparency is the quality of being easily seen through. thermal evaporation Something that is thermal is hot, retains heat, or has a warming effect. Evaporation is the process of a substance in a liquid state changing to a gaseous state due to an increase in temperature and/or pressure. dissolve To dissolve is defined as to become broken up or absorbed by something or to disappear into something else. bicarbonate of soda a white water-soluble powder, used chiefly as an antacid, a fire extinguisher, and a leavening agent in baking. thermal Something that is thermal is hot, retains heat, or has a warming effect filtering To filter a substance means to pass it through a device which is designed to remove certain particles contained in it. melting Melting, is a physical process that results in the phase transition of a substance from a solid to a liquid. separate, part, and divide mean to break into parts or to keep apart. Interesting Books Sticky Knowledge about Reversible and Irreversible changes q Irreversible changes, like burning, cannot be undone. Reversible changes, like melting and dissolving, can be changed back again. Important facts to know by the end of the reversible and irreversible changes topic: • Know what a reversible change means. • Know what an irreversible change means. • Give examples of reversible and irreversible changes. • Know that some materials will dissolve in liquid to form a solution, and describe how to recover a substance from a solution. • Use knowledge of solids, liquids and gases to decide how mixtures might be separated, including through filtering, sieving and evaporating q Mixtures can be separated out by methods like filtering and evaporating. A change is called irreversible if it cannot be changed back again. q Examples of reversible changes. Melting: Melting is when solid converts into a liquid after heating. Example of melting is turning of ice into water. Freezing: Freezing is when a liquid converts into a solid. q A cooked egg cannot be changed back to a raw egg again. Mixing substances can cause an irreversible change. For example, when vinegar and bicarbonate of soda are mixed, the mixture changes and lots of bubbles of carbon dioxide are made. Burning is an example of an irreversible change.
Mayan civilization: KS 2 Knowledge Mat Subject Specific Vocabulary glyphs Symbols used in the Mayan writing system. Each symbol represents a word or sound. codices Books created by the Mayans. They were made of soft bark and folded like a fan. Chichen Itza The Mayans most well-known pyramid. Cacoa Seeds that the Maya used to make chocolate. Ahau or Ahaw The main king or lord of a Maya city -state. Batab A lesser lord, usually ruling over a small town. Itzamna The main god of the Maya, Itzamna was the god of fire who created the Earth. Huipil A traditional garment worn by Maya women. Kin Word representing a day in the Maya calendar. Kukulcan The serpent god of the Maya. One of the primary gods, especially to the Itza peoples of Chichen Itza. Uinal Word for a month in the Maya calendar. It was 20 days long. Each symbol represents a letter or sound Exciting Books Sticky Knowledge about the Mayan civilization q The Mayans were expert mathematicians and astronomers. They used this expertise to make calendars. q Although the Mayans had metal-working skills, metal ores were scarce. Mayans used stone tools to carve the limestone that they used for their buildings. q Mayan religion was extremely bloodthirsty, demanding human sacrifices and blood-letting rituals. The Mayans believed in an afterlife and that those who were sacrificed, as well as those killed in war and women who died in childbirth, went to ‘the place of misty sky’. q At the top of Mayan society was the King and Royal family who were believed to be closely linked to the gods. An educated elite of scribes, priests and nobles formed the ruling class. They occupied the finest buildings in the city. q Mayan society was formed of a number of city states each with their own ruler. Mayans. The Mayan, or Maya, peoples made their home in an area known as Mesoamerica (modern day Mexico and Central America). Mayan culture was well established by 1000 BCE, and it lasted until 1697
North America KS 2 Knowledge Mat Subject Specific Vocabulary Exciting Books A buck A nickname for the American dollar. Cherokee A member of an American Indian people formerly inhabiting much of the southern US American state The U. S. is a country of 50 states covering a vast swath of North America. National park An area of countryside, or occasionally sea or fresh water, protected by the state for the enjoyment of the general public or the preservation of wildlife The ‘big apple’ This is the nickname associated with New York city. The nickname became common as from the 1920 s. q There are 23 countries in North America, with 10 biggest North American counties coyotes Coyotes were a purely North American animal that lived in the West. A small wolf -like creature. q Mexico City is the largest city with more than 9 Statue of Liberty The Statue of Liberty is a colossal neoclassical sculpture on Liberty Island in New York Harbour in New York City. q Before the Europeans arrived, the indigenous Chichén Itzá is a complex of Mayan ruins in Mexico. It is a massive step pyramid. q Greenland is the not only the biggest island in A cold shoulder An American metaphor for deliberately ignoring someone. q Missouri river is the longest in North America • • • Lighten up To relax and not to take things too seriously. q Lake Superior, which borders Canada and the US Sticky Knowledge about North America Canada being the biggest and Grenada being the smallest. million people living there. and native Americans lived in the continent. Today, only about 2% of US Americans consider as descending from native Americans. North America but also in the world. and flows through seven US states. Denali mountain is the highest mountain in North America. is the third largest lake in the world and the largest North American lake. Mexico Canada USA Nicaragua Honduras Cuba Guatemala Panama Cost Rica Dominican Republic
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