Category 1 Science STAAR Test Review

The freezing point of water is ________.

• 32^o_C
• 100^o_F
• 0^o_C
• 25^o_F

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

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

Students conduct and investigation to determine which substances are soluble in water.  All of the following have the property of solubility in water EXCEPT - 

• sugar cubes
• salt crystals
• cooking oil
• food coloring

Which mixture can be separated using a coffee filter?

• rocks and sand
• sand and water
• lemon juice and water
• sand and iron filings

What physical property of matter can be measured using the triple beam balance?

• length
• height
• volume
• mass

Students are combining dried beans and rice.  What would be the most efficient way to separate the ingredients?

• Evaporation
• Coffee Filters
• Tweezers
• Microscope

Cracks in the seafloor called hydrothermal vents send streams of hot water into the ocean. The water from a vent is 387°C. How many degrees above the boiling point of water is this temperature?

• 175 C.
• 287 C.
• 387 C.
• Not Here

When a powdered drink mix was added to water, the liquid turned orange. A student decided the taste was too strong, so he poured out half of the liquid and added more water. Which of the following most likely occurred when more water was added?

• The physical state changed.
• The orange color became lighter.
• The liquid had a sweeter taste.
• None of the above

A student observes ice forming on the edge of a school building. At what temperature did the water outside the school building most likely begin to change to ice? 

• 100 C.
• 32 C.
• 25 C.
• 0 C.