Unit 3 Minerals, Rocks, & Fossils

Which of the following is true about fossils?

• Fossils found in lower layers of  rock  are older than fossils found in upper layers of  rock.
• Fossils found in upper layers of  rock are older than fossils found in lower layers.
• The relative age of fossils cannot be determined from their position in rock layers
• Fossil found in lower layers are as old as fossil in the upper layers

Dr Thakkar was studying a fossil from a dig in a desert when he noticed  that the organism had evidence of fins. What would the most likely tell Dr Thakkar?

• Sea animals used to live in deserts
• Nothing; every fossilized organism has fins
• the desert was once covered by water
• the organism grew legs when it wanted to leave the ocean

Which rock type can be formed by adding heat and pressure to any of the three types of rocks?

• Igneous
• Metamorphic 
• no rock type forms this way
• sedimentary

Which type of rock is created when lava cools and hardens?

• sedimentary
• cement
• metamorphic 
• igneous

Scientist decided that age of different rock layers by the things that they uncover in the rock. Which of the items below could scientist use to date a rock layers?

• an insect flying near the dig site
• a green leaf that fell from a tree
• a fossilized fish
• a raindrop on the rock

Granite is a type of igneous rock. What determines the size of the crystals that form in a sample of granite?

• how large the sample is
• how much impurities are in the granite
• how quickly the rock cooled
• how many times those minerals have been in granite before

Which type of physical processes below the results in the formation of metamorphic rocks?

• weathering & erosion
• Cooling & Crystalization
• heat & pressure
• deposition & eruption

Which of the following parts of an organism is most likely to become fossilized?

• lung
• heart
• skin
• tooth

what can scientist learn by studying fossils?

• how the Earth's surface & climate has changed over time
• the appearance of an organism and its structure
• How the species has changed over time
• All of these

Which is the following is the raw materials from the sedimentary rocks are formed?

• lava from volcanic eruptions
• weathered remains of other rocks
• none of these
• magma from the mantle