Science Countdown 5.1 and 5.2

Below is a picture of a drilling rig in the

ocean. Crude oil is a type of fossil fuel

mined from the Earth’s crust by drilling into

the ocean floor.

What materials must have been present during the formation of crude oil in the Earth’s crust?

• Sand deposits from rock erosion

• Silt from the bottom of the ocean

• Ancient remains of plants and animals

• Natural gas present in the Earth’s crust

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5.7.A

Rock layer B contains many plant fossils, like the one shown here.

Which environment most likely existed when this rock layer was formed?

• Forest

• Desert

• Ocean

• Tundra

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5.9.D

Which physical property of a material determines how well it can conduct electric energy?

• The solubility of the material in water

• The type of material it is made of

• The density of the material

• The texture of the material

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5.5.A

The Edwards Plateau region of Texas, also known as the Texas Hill Country, is in central Texas. The area consists of many springs, stone hills and steep canyons. The Edwards Plateau is considered a mid-to-tall grass prairie, with many mesquite trees, ash juniper trees and live oak trees. The region contains many animals that are found nowhere else in the world. The table below contains facts about four bird species found in Texas.

Which bird species listed above most likely makes its home in the Edwards Plateau region of Texas?

• Golden-cheeked Warbler

• Double-crested Cormorant

• Barn Owl

• Crested Caracaras.

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3.9.A

Every autumn, the leaves on deciduous trees in the northern part of the United States turn bright colors, like red, orange and yellow, and then fall to the ground. The trees do this to protect themselves from the harsh winter weather.

This is an example of –

• organisms changing the environment to meet their needs

• organisms responding to changes in the nonliving elements of their environment

• organisms responding to changes in the living elements of their environment

• the environment changing to meet the needs of the organisms

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5.9A

Which example below is NOT an example of work being done on an object?

• A person pulling a wagon filled with dirt

• A person pushing against a large oak tree

• A person pushing a door open

• A person lifting a heavy box off the floor

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3.6B

Sundials have been used since ancient times to measure time using the shadows cast bythe sun. Below is an image of a sundial showing the time 4:00 P.M.

Which picture below shows the time 8:00 A.M.?

• 
• 
• 
• 

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5.8C

A science teacher is teaching a lesson on states of matter. At the front of the classroomshe sets up an experiment with an electric hot plate and a beaker filled with broken piecesof crayons. As the solid crayons heat up, they turn into liquid crayon wax.What two types of energy are used in this investigation to turn the crayons from solids into liquids?

• Mechanical and thermal

• Thermal and light

• Electrical and thermal

• Electrical and mechanical

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5.6.A