Which object has the main function of reflecting light.

Which of these BEST describes the change in salt grains as they dissolve in water?

Which statement about gases is NOT true?

Tina is standing beside a car with tinted windows. Which of the following shows that a tinted car window is reflecting light?

What happens when a small amount of salt, seaweed, and sand mixes with water?

Circuit A is constructed using a 6-volt battery, copper wires, and a bell. Circuit B is constructed using a 9-volt battery, string, and a bell. Circuit A produced a sound, but Circuit B did not produce a sound. Which of the following most likely explains why circuit B did not produce a sound?

Some students were studying different types of mixtures. They stirred together one cup of oil and one cup of water in a large glass beaker. They observed that the water settled to the bottom and the oil floated to the top. Which of the following does this investigation demonstrate?

Four small metal cylinders were filled with boiling water and placed into different containers. Which container was the best insulator?

The circuit has three lightbulbs and a bell. Which procedure will result in the green bulb operating, the bell producing a sound, and only one blue lightbulb operating?

An old-fashioned metal toy is shown below. When the candle is lit, the carousel of horses begins to turn. Which of these is the source of energy that makes the carousel turn?