A student puts four objects in a bucket filled with water. the objects are listed below.
∎Plastic ball
∎Glass Marble
∎Metal paper clip
∎Wood block
Which two objects are most likely less dense than water?

• Wood block and metal paper clip
• Plastic ball and glass marble
• Metal paper clip and glass marble
• Wood block and plastic ball

A teacher mixes white powder into a beaker of water. The powder cannot be seen in the water. The teacher then heats the mixture until the water evaporates and the powder can be seen again. Which property of the powder is the teacher demonstrating?

• Solubility
• Density
• Conductivity
• Mass

The classification of matter as a solid, liquid, or gas

• boiling point

• thermal energy

• physical state

• temperature

Tags

NGSS.MS-PS1-4

The temperature at which a substance changes from a liquid to a solid.

• freezing point

• boiling point

• melting point

• evaporation

The temperature at which a substance changes from liquid to gas.

• boiling point

• melting point

• evaporation

• condensation

The temperature at which a substance changes from a solid to a liquid.

• boiling point

• freezing point

• melting point

• evaporation

Some people add sugar to hot tea. Which property of sugar remains the same when the sugar is in the tea solution?

• The taste of the sugar

• The size of the sugar crystals

• The color of the sugar crystals

• The texture of the sugar crystals

A small bowl contains a mixture of toothpicks and glass marbles. The easiest way to separate the mixture without touching it would be...

• add glue to the mixture

• place a magnet in the bowl

• pour the mixture into a paper cone

• add water to the bowl

Water flows through turbines in dams like the one shown above. The flowing water makes the turbines spin. What type of energy is used to make the turbines spin in this type of dam?

• Light energy

• Thermal energy

• Sound energy

• Mechanical energy

Which object requires only mechanical energy to perform its main function?

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