Rocks that have been exposed in high heat and suddenly exposed to a very low temperature can cause the rocks to crack beacause as the outer layer of the rocks cool and contracts, the inner part of the rock is still hot and expanding causing the rock to crack., Usually happens in places where there are sudden huge change in temperature., Eg. Dessert
Water enters small cracks in rocks and when it freezes, the water expands to form ice and causes the rock to crack. The rocks may eventually break if this "freeze,thaw" cycle occurs repeatedly., Usually happens in cold places where there is water., Eg. Artic tundra
Plants may grow in the small cracks found in the rock as the plant grows the cracks widen and the rock can fall apart if there is the force exertrd by the plant is strong enough, Usually happens in places where there is a lot of plant growth, Eg. Tropical rainforest
Made from magma that has hardened either below or above the earth's surface., Coarse-grained igneous rocks, Fine-grained igneous rocks
Made from sediments that have pilled up and hardened over time.
Made from either Igneous or sedimentary rock that has been subjected to high heat and extreme pressure.
Flowing water carries rocks and small pebbles and they constantly grind on the rocks. Eventually over time it would cut through the rocks., Usually happens in rivers
Waves constantly pound on rocks causing them to crack and crumble away., Usually happens in coastlines
Sand blown by wind acts like a gigantic sandblaster and erodes the surface of rocks., Usually happens in desserts
clear, colorless, odorless, viscous liquid that is very corrosive, Chemical composition:H2SO4
Colourless when pure very toxic and corrosive, Chemical composition:HNO3
It is a white solid at room temperature. Can be melted at about 43°C. When melted it forms a colourless viscous liquid. Not a really strong acid like sulfuric and nitric acid., Chemical composition:H3PO4
Alkali has bitter taste
Alkali is a basic, ionic salt of an alkali metal or alkaline earth metal element
Alkalis are normally water soluble, although some like barium carbonate are only soluble when reacting with an acidic aqueous solution.
Examples of alkalis are., sodium hydroxide, potassium hydroxide, magnesium hydroxide, Salsola soda
Acids has sour taste
An acid is a substance which reacts with a base.
Examples of acids are., acetic acid, tartaric acid, citric acid, deoxyribonucleic acid