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Physics 7 Online
OpenStudy (anonymous):

plz help me with 6 questions (medal and follow)

OpenStudy (anonymous):

Question 36 (Multiple Choice Worth 2 points) Erosion can be caused by any of the following EXCEPT water ice wind mineral deposits Question 37 (Multiple Choice Worth 2 points) If an animal leaves a footprint in soft mud, what type of fossil may be made? A mold fossil cast fossil amber fossil trace fossil Question 38 (Multiple Choice Worth 2 points) The grain of a rock is its texture how many layers it has the rock's speckled appearance how easily it fractures Question 39 (Essay Worth 4 points) Name and describe two types of mechanical weathering. Question 40 (Essay Worth 4 points) Describe two human actions that cause water pollution. Question 41 (Essay Worth 4 points) List and describe two ways that scientists can date fossils found in the earth. Question 42 (Essay Worth 4 points) Give an example of erosion. Question 43 (Essay Worth 4 points) How can we use rocks to determine how an area used to look in the past?

OpenStudy (anonymous):

@AnswerMyQuestions

OpenStudy (anonymous):

36 is mineral deposits

OpenStudy (anonymous):

thanks :D

OpenStudy (anonymous):

yw ill do the rest now

OpenStudy (anonymous):

kk

OpenStudy (anonymous):

37 is trace fossil

OpenStudy (anonymous):

38 ill have an explantion "Grain refers to the mineral particle sizes that make up the rock. The grain may be sand grains in sandstone, feldspar crystals in granite, or clay particles in mudstone."

OpenStudy (anonymous):

41 * Temperature change => Temperature changes make rocks expand and contract. And it's one of the important cause of mechanical weathering. When the sun warms up the surface of a rock, the heat causes it to expand. Rainwater enters the cracks in the rock, and if the temperature drops below freezing, the water in the cracks freezes and expand, causing rocks to split. Also, extreme heat causes the earth to dry and rocks to contract, If the rocks expand and contract on a daily basis,they will eventually crack open due to the stress. * Water Abrasion => Wind and moving water cause rocks to rub against each other and the rocks could well break into smaller pieces. Wind and water can polish , smooth, scrape, and flatten sides of rocks. Water can cause major changes on the earths surface. On the coast, ocean waves crashing shores can break down the coastal material.

OpenStudy (anonymous):

42 1.carbon dating 2.radiometric dating

OpenStudy (anonymous):

43 Some sorts of rocks are sedimentary, i.e., they were created by building up sands in the sea. Later, they were pushed up and turned around etc. Often, the (formerly horizontal) layers of sand can be clearly seen and give an indication what was horizontal; and that actually there was a sea somewhen in or near this area.

OpenStudy (anonymous):

thats all hope u like it

OpenStudy (anonymous):

can u help with one more

OpenStudy (anonymous):

sure

OpenStudy (anonymous):

Question 26 (Multiple Choice Worth 2 points) All of the following are part of the process of forming sedimentary rock EXCEPT deposition cementation compaction fossilization Question 27 (Multiple Choice Worth 2 points) Any rock that cools from material that comes to the surface as molten material is called metamorphic rock igneous rock changed rock weathered rock last

OpenStudy (anonymous):

last one

OpenStudy (anonymous):

ok

OpenStudy (anonymous):

Fossilazation

OpenStudy (anonymous):

Any rock created by the cooling of magma or molten material is classified as an igneous rock. These rocks can either be cooled in the earth or on the earths surface. Rocks cooled inside the earth are called intrusive igneous rocks, and have large crystals. Rocks cooled on the earth's surface are called extrusive igneous rocks. These rocks, due to faster cooling times, have very very tiny crystals. thats for 27

OpenStudy (anonymous):

hey o n the first couple questions u skipped 2 @evilbrand97

OpenStudy (anonymous):

@evilbrand97 can u number the answers u got for me on the first ones?

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