Science STAAR Released Review Questions

Front

Which objects are electrical insulators?

Back

Eraser, toothpick, cotton ball

Front

Which property is the best evidence that an object is a metal?

Back

Conductivity

Front

A group of students is given four small cubes of the same size and instructed to place them in a beaker of water. One cube floats to the surface of the water. Two of the cubes float in the middle of the beaker under the surface of the water. The last cube sinks to the bottom of the beaker. Which conclusion is best supported by what the students observed?

Back

One of the cubes is more dense than the other three.

Front

Students conduct an investigation with breakfast cereal. The first four steps of the students' investigation are: 1. Grind 50 grams of cereal into a fine powder. 2. Stir the cereal powder into 500 milliliters of warm water. 3. Hold a magnet against the side of the beaker at the 250-milliliter mark. 4. Stir the mixture for three minutes. What substance are the students trying to determine the presence of in the cereal?

Back

Iron

Front

A student mixes a sample of stones with a sample of table salt. The mass and volume of the samples were determined before mixing the samples. The mass and volume of each sample is shown: Which statement is true about the mixture?

Back

The mass of the mixture is 85 grams.

Front

Essential item for a lizard in a terrarium at night?

Back

Lamp

Front

Why is a lamp important for a lizard in a terrarium at night?

Back

It helps maintain a warm temperature.

Front

Forms of energy compared to speed up evaporation in a student's investigation.

Back

Mechanical energy and thermal energy

Front

Which examples use mechanical energy to perform their functions?

Back

Examples 1, 3, and 4

Front

What kind of energy causes water to evaporate?

Back

Thermal energy from the environment