Science Review

A teacher wears protective gloves to lift a metal pan filled with boiling water from a hot plate. Why are the protective gloves necessary?

• The metal pan creates thermal energy
• The metal pan insulates thermal energy
• The metal pan conducts thermal energy
• The metal pan reduces thermal energy

Tags

NGSS.MS-PS3-3

What describes the ability of a solid to dissolve in water?

• melt
• dissapear
• solubility
• evaporate

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

Objects that blow into a swimming pool or that are dropped into the pool by swimmers need to be removed. These objects include foam cups, keys, and coins. Which of the following explains a useful method for removing some of these objects?

• The keys and coins are less dense than water, so they can be easily picked up off the bottom of the pool by divers
• The foam cups have the same density as water, so they can be cumbled up for removal by the pool filter.
• The foam cups are less dense than water, so they can be removed from the surfase with a pool cleaning net.
• The keys and coins have the same density as water, so they can be washed away when the pool is drained

Which of these is not soluble in water?

• Oil
• Salt
• Honey
• Sugar

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

Tags

NGSS.MS-PS1-2

A student made a mixture using equal amounts of salt and pepper. The salt grains were the same size as the pepper grains. What should the student do to most easily separate the pepper from the salt?

• Use a pair of tweezers to remove each grain of pepper
• Runa small magnet through the mixture to attract the pepper
• Put the mixture in water and filter the pepper out of the water
• Use a strainer with a fine wire screen to remove the pepper

Which liquid is the most dense?  

• oil
• water
• syrup
• plastic bottle

What would be the best title for this data table?

• Tools for Measuring Matter
• Tools for Measuring Length
• Tools for Measuring Volume
• Tools for Measuring Mass

Daniella is handed a solid, silver-colored metal object. The metal object conducts thermal energy. It is NOT attracted to a magnet. This object is most likely made from- 

• Brass
• Copper
• Steel
• Aluminum