Primary Level 4 - English for Science - Unit 4 - Earth and its habitats PDF

Primary Level 4 -- English for Science Unit 4 -- Earth and its habitats Word to remember - Core - Crust - External Structure - Internal Structure - Magma - Mantle - Ash - Composite volcano - Crater - Erupt - Lava - Plateau - Risk - Secondary cone - Vent...

Primary Level 4 -- English for Science Unit 4 -- Earth and its habitats Word to remember - Core - Crust - External Structure - Internal Structure - Magma - Mantle - Ash - Composite volcano - Crater - Erupt - Lava - Plateau - Risk - Secondary cone - Vent - Coastal area - Earthquake - Epicenter - Focus - Landslide - Transfers - Tsunami - Wave - Beak - Crack open - Fins - Gills - Strain **Meanings**: **Core** - the centre of the Earth. 'Core' is a commonly used word in English that always means 'at the centre of'. **Crust** - the outer layer of the Earth. Note that 'crust' is also used in English to describe the hard-outer layer of bread. **External Structure** - materials that make up the surface of the Earth and other things. 'External' means 'outside', so we are referring to materials on the surface of the Earth that we can see. **Internal Structure** - materials that make up the inside of the Earth. 'Internal' means 'inside' so we are referring to materials inside the Earth that we can't see. **Magma** - melted rocks Mantle - the layer of the Earth below the crust which consists of magma Ash - burnt material. For example, the grey powdery material left when wood has burnt **Composite volcano** - a volcano that erupts lava and ash which builds up into a cone-shaped mountain. 'Composite' means being made up of more than one type of material **Crater** - a large hole at the top of a volcano where material erupts **Erupt** - to shoot out suddenly. For example, if you boil milk in a saucepan and do not watch it, the milk can erupt out of the pan and on to the stove **Lava** - magma that reaches the surface of the Earth **Plateau** - a flat uplifted area of rock. For example, most of India and Africa consists of a plateau **Risk** - the possibility of something happening. For example, if you climb a tree, there's a risk you might fall **Secondary cone** - a small volcano that erupts on the side of the main volcano **Vent** - a hole. For example, buildings have vents built into them to allow air in. The vents are grids with holes in **Coastal area** - a low lying area along the border between land and sea. The coastline is the outline of the border between the land and the sea as you see it on a map **Earthquake** - a shaking of the Earth **Epicenter** - the point on the surface of the Earth immediately above the focus. The epicenter is where the most damage occurs **Focus** - the point in the crust under the Earth's surface where the earthquake starts; we also use the word 'focus' in English to mean the central point -- for example, the focus of the lesson was earthquakes Landslide - a mass of rocks and soil that slides down a slope. The vibrations from the earthquake cause these to happen **Transfers** - to move from one place or thing to another. For example, the energy of an earthquake transfers to waves **Tsunami** - a huge wave which happens when an earthquake starts under the sea **Wave** - a way in which energy travels. For example, earthquakes travel through the Earth's crust in waves