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Can some rocks be dissolved by anything besides acid? by Mind Map: Can
rocks be
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Can some rocks be dissolved by anything besides acid?

Water in the small cracks found in rocks expand when it freezes and causes small cracks in the rock to appear.

Rocks are hard and durable

Rocks can crack

As a result of large changes in temperature

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

As a result of freezing

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

As a result of plant growth

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

There are three types of rocks

Igneous rock

Made from magma that has hardened either below or above the earth's surface., Coarse-grained igneous rocks, Fine-grained igneous rocks

Sedimentary rock

Made from sediments that have pilled up and hardened over time.

Metamorphic rock

Made from either Igneous or sedimentary rock that has been subjected to high heat and extreme pressure.

Rocks are made of minerals

Eg. quartz

Eg. sand

Rocks can erode over time

Caused by action of running water

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

Caused by action of waves

Waves constantly pound on rocks causing them to crack and crumble away., Usually happens in coastlines

Caused by action of wind

Sand blown by wind acts like a gigantic sandblaster and erodes the surface of rocks., Usually happens in desserts

Rocks are made of different elements.

Eg. Chalk & limestone - Calcium,Carbon,oxygen

Eg. Diamond - Carbon

Some concentrated acids can dissolve rocks very quickly

Sulfuric acid

clear, colorless, odorless, viscous liquid that is very corrosive, Chemical composition:H2SO4

Nitric acid

Colourless when pure very toxic and corrosive, Chemical composition:HNO3

Phosphoric acid

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

Substances are either acidic or alkali

Alkali have a ph of 7 and above

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 have a ph of 7 and below

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

Rocks are generally classified by mineral and chemical composition, by the texture of the constituent particles and by the processes that formed them.