1st Six Weeks Review

Which of the following best describes a liquid?

• It has a bright color.

• It takes the shape of its container.

• You cannot weigh it on a scale.

• It has molecules more tightly packed than a solid.

Which word best describes water vapor turning into liquid water?

• freezing

• boiling

• melting

• condensing

What happens to salt as it dissolves in water?

• The salt changes chemicals until it becomes water

• The salt ges hotter until it melts into a liquid.

• The salt breaks down and gets smaller in size until they can no longer be seen.

• The salt is washed clean until they are clear.

What is the definition of a mixture?

• A combination of 2 or more substances that maintain their properties

• When one substances breaks down evenly into another substance.

Ny'Angela adds a spoon of salt to a glass of water. Which statement is NOT true after she stirs the water?

• The salt evaporates from the water.

• The salt particles become smaller in size.

• The salt dissolved in the water

• The salt caused the water to become a solution

Some people use a hot iron to straighten their hair. It is very hot when plugged in for a while. If you want to protect your skin, you would need to pick it up on the plastic end. Which property of the plastic is important for it to be used on a hot iron?

• Plastic is soluble in water

• Plastic conducts electrical energy

• Plastic emits magnetic energy

• Plastic insulates thermal energy.

Annavi placed a piece of cork, and a similarly sized rock in a container of water. Why would the cork float on the water and the rock sink to the bottom of the container?

• They are different states of matter.

• They are different sizes.

• They have different densities.

• They have different shapes.

Leaving ice cream in the sun is an example of....

• boiling

• lowering the temperature

• matter melting

Which of the following items will dissolve when mixed with water?

• Almonds & sugar

• Chocolate powder mix & sugar

• Chocolate powder mix & strawberries

• Almonds & strawberries

Which observation is TRUE about a mixture of sand and water?

• The sand dissolves in the water and colors the water brown.

• The sand breaks down into smaller pieces and is no longer visible.

• The sand sinks to the bottom after Ms. Mathai stopped stirring.

• The sand evaporated and the water remained in the cup.