5th Grade Science STAAR Revi

Some students put two ice cubes on separate plates. One ice cube had a mass of 80 grams. The other had amass of 40 grams. Which result would be the same for both ice cubes in this investigation?

• The time it took each ice cube to melt completely
• The temperature at which each ice cube melted
• The amount of liquid produced on each plate
• The total volume of each ice cube

One of the brightest objects in the night sky is a planet that is closer to the sun than Earth is. What is the name of this planet?

• Mars
• Saturn
• Jupiter
• Venus

Several students investigate the characteristics of soil. The students observe samples of common soils. In one sample they observe that water drains through the soil easily. When they rub the soil between their fingers, it feels rough and scratchy, and its particles feel hard. The soil the students observed is most likely  

• Clay
• Silt
• Loam
• Sand

Which of the following observations would most likely be seen between precipitation and evaporation?

• Water following downhill
• Fog forming along a highway
• The water level of a lake decreasing
• Dark clouds forming in the sky

A teacher wears protective gloves to lift a metal pan filled with boiling water from a hot plate. Why are the protective gloves necessary?

• The metal pan creates thermal energy
• The metal pan insulates thermal energy
• The metal pan conducts thermal energy
• The metal pan reduces thermal energy

Which of these is the best conductor of electricity?

• Glass rod
• Cotton string
• Plastic tubing
• Copper penny

A student made a mixture using equal amounts of salt and pepper. The salt grains were the same size as the pepper grains. What should the student do to most easily separate the pepper fromt eh salt?

• Use a pair of tweezers to remove each grain of pepper
• Run a small magnet through the mixture to attract the pepper
• Put the mixture in water and filter the pepper out of the water
• Use a strainer with a fine wire screen to remove the pepper

Which of these describes how a canyon was most likely formed?

• Floods eroded the sandstone away from the canyon walls.
• Glaciers eroded the canyon rock as they melted and moved.
• Ice wedged into cracks in the rock and weathered the canyon walls.
• Wind blew large rocks that smashed against the canyon walls.

A valley was most likely formed by...

• Flash flooding
• A glacier
• A hurricane
• Melting snow

An energy company wants to build a hydroelectric power plant. Which of these characteristics of an area is most important to the development of a hydroelectric power plant?

• The area has a cool, rainy climate.
• The area is located in a valley with very little wind and frequent heavy fog.
• The area has a river that flows rapidly from nearby mountains through a valley.
• The area has no geysers or hot springs.