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Properties of Matter
5th grade STAAR review.
|Two wires carrying electricity can create a spark if they come too close to each other. Wires carrying electricity are usually covered with plastic to keep them from starting a fire. Why does plastic keep the electricity from starting a fire?||Plastic is a good insulator.|
|A student puts four objects in a bucket filled with water: - plastic ball - glass marble - metal paperclip - wood block Which two objects are most likely less dense than water?||Wood block and plastic ball.|
|A teacher mixes a powder in a beaker of water. After 1 minute, the powder can no longer be seen. Then, the teacher heats the beaker of water until the water evaporates and the powder can be seen again. Which property of the powder was the teacher testing?||Solubility|
|A bottle of salad dressing has the ingredients: oil, vinegar, and spices. The directions say to shake well before using. Why would you want to shake the dressing before using it?||Oil and vinegar have different densities.|