5th Grade Science Unit 3 and 4 Test

Andy adds a small amount of water to sand and makes shapes with the wet sand. Which of these BEST describes the wet sand?

• a mixture

• a solution

• an element

• a compound

Solids that are combined together and maintain their physical properties are BEST labeled as a

• solute

• mixture

• solvent

• compound

Iron filings and sulfur powder are combined to form a mixture. What will happen if a magnet is held over the mixture?

• The magnet will attract the entire mixture.

• The magnet will attract only the iron filings.

• The magnet will not attract any of the mixture.

• The magnet will attract only the sulfur powder.

In a climate with cold winters, a rock cracks and breaks. What substance froze inside the rock causing it to break?

• calcium

• Boil

• oxygen

• water

Sediment deposition, earthquakes, and weathering are similar in that they

• can all change the surface of the earth.

• are all a result of weather.

• all happen quickly.

• all cause erosion.

Which process causes sand grains to stick together to form sandstone?

• abrasion

• cementation

• combustion

• erosion

Which type of rock can have fossils in it?

• melted rock

• igneous rock

• sedimentary rock

• metamorphic rock

Coal is formed from

• seas that have evaporated.

• natural gas subjected to heat.

• melted and cooled metamorphic rock.

• plant remains decomposed under pressure.

A light wave travels through the air, passes through glass, and then travels back into the air. Which BEST describes what is happening to the light when it passes from the air and travels through the glass?

• The light wave is refracted.

• The light wave is diffused.

• The light wave is reflected.

• The light wave is diffracted.

The picture shows a straw inside a glass of water. The straw appears to bend when viewed inside a glass of water because light is being

• reflected.

• refracted.

• absorbed.

• compressed.