5th Science STAAR review

A metal spoon was left in a cup of hot tea. Maya picked up the spoon to stir the tea and burned her fingers by touching the spoon. Why did her fingers get burned?

• The metal spoon chemically reacted with her hand.
• The metal spoon conducted electricity to her hand.
• The metal spoon conducted heat to her hand.
• The metal spoon insulated her hand.

During a science demonstration, a student used sugar cubes to create models of buildings. The student placed water in a dropper bottle and slowly dripped the water on the sugar cubes. The cubes changed shape, modeling weathering. What physical property allows for the demonstration?

• The sugar slowly dissolved to make a solution.
• The sugar slowly dissolved to make a new substance.
• The sugar slowly evaporated in the water.
• The sugar slowly melted into the water.

Your teacher collects samples of salt water from the ocean near Galveston, Texas. She collects water samples at 1 meter and at 10 meters from the shore. She wants to determine how much salt is in each water sample. How can she find out?

• Pour each water sample through a filter, then measure the water’s mass.
• Use a bar magnet to separate the salt from the water in each sample.
• Put the water samples in separate cups and allow the salt to evaporate.
• Measure the mass of the salt in each sample after the water evaporates.

A student adds 100 mL of water to a beaker and brings the water to a boil. She then places a thermometer in the beaker. Which thermometer below represents the thermometer in the beaker?

• 1
• 2
• 3
• 4

A metal pan with butter is placed on a stove. If the stove is turned on, which processes occur that cause the butter to melt?

• The pan conducts heat to the butter and the particles that make up the butter slow down.
• The pan cools the butter and the particles that make up the butter
  speed up.
• The pan conducts electricity to the butter and the particles that make up the butter speed up.
• The pan conducts heat to the butter and the particles that make up the butter speed up.

You are asked to identify a round disk. You think it is made of plastic, but your friend thinks it is a round piece of colored metal. What test will not show the difference between plastic and metal?

• Test to see if it can conduct electricity.
• Test to see if it breaks when bent with a pair of pliers.
• Test to see if it can conduct heat.
• Test to see if it is heavy.

A teacher gives her students a battery, wires, fan blades, and a motor. The diagram below shows how the students assembled these parts. What can the students do with this device?

• Use wind energy to store electricity in the battery.
• Use the energy stored in the battery to turn the fan blades.
• Use the motor to generate fossil fuels.
• Use the battery to turn wind energy into hydroelectricity.

Sophia thinks that the Moon produces its own light, like the Sun. Her science teacher explains that the light rays coming from the Moon are —

• refracted light from Earth
• reflected light from the Sun
• reflected light from other planets
• D  refracted light from the Sun

Jessica is practicing her basketball passing skills. She wants to make sure her teammates can get the ball. She tries multiple ways to pass the ball and discovers that the —

• more force she uses, the shorter the distance the ball will travel
• more force she uses, the more gravity pushes the ball 
• less force she uses, the farther the ball will travel 
• more force she uses, the farther the ball will travel

Sherry sets up the circuit shown below. She wants to light the bulb, but when she closes the switch nothing happens. She discovers that one of the wires does not reach the battery. Which material will help her complete the circuit and light the bulb?

• plastic paperclip
• aluminum foil
• pink silk ribbon
• drinking straw