The property of reflectivity describes how

A difference between copper and plastic is that copper has a much higher

Which of the following properties is an example of a substance changing into a new substance?

your teacher has asked you to set up an experiment in order to identify a substance. She wants you to test for hardness. How would you do this?

Ms. Levings has asked you to set up an experiment in order to identify the substance. She wants you to test for brittleness. How would you do this?

Ruby works at a warehouse that stocks household items. Unfortunately, she forgot to label some of the white powders that the warehouse has in stock. Ruby knows that she has face powder, flour, powdered laundry soap and powdered sugar, but she doesn't know which powder is which. Which is the best way Ruby could go about identifying each powder if she knows about each substances' properties?

An archeologist is working on an excavation in the mountains of Peru. She uncovers an artifact and tests its hardness by scratching the surface with the tools she has brought with her. She uses the Mohs Hardness Test, which says the harder the material will leave a scratch on a softer material. Her fingernail and copper penny do not leave a scratch. However, the steel nail does leave a scratch on the artifact. What conclusions can you make about the artifact's hardness?

Logan is building a machine in his garage. Which would be the best material for him to use if he wants his machine to have both high thermal and electrical conductivity?

Ty woke up this morning with an upset stomach, so his dad gives him an antacid tablet to help him feel better. Ty observes that adding the antacid tablet to a glass of water causes it to fizz. What property is the fizzing an evidence of?

Your class is on a field trip to a historic gold mining town. The souvenir shop claims to be selling nuggets of gold. You buy a piece of the gold and plan the tests you will do when you get back to school to determine if it is real gold.

Possible tests

1. Scratch it with the steel knife, because gold with scratch but not pyrite.

2. Hit it with a hammer; pyrite is brittle and will shatter but gold with flatten.

3. Look at the color; iron pyrite is pale yellow and gold is bright yellow.

4. Hold it up to a light to see how shiny it is; iron pyrite and gold are both metals.

Look at the table to answer the question. Which cup material took the longest time for the tea to cool?

Look at the table to answer the question. Rank the materials in order from highest to lowest thermal conductivity.

The company is designing a cup to be taken on a long hiking trip. In addition to considering the thermal conductivity of the material, which other property would be important in designing a portable cup?