Review on Earth & Space and Mixtures & Solutions

A student explains to her sister how a jar of juice has different physical properties than a bowl of cereal.  Which of the following statements best explains the differences?

• The juice is translucent, whereas the cereal is transparent.

• The cereal is a mixture, whereas the kool-aid is not.

• The powder of the juice dissolved in the water, whereas the cereal did not dissolve in the milk.

• The cereal is a solution, whereas the kool-aid is a mixture.

A bottle contains 400 grams of water. A student puts 40 grams of sugar in the water. The student then stirs the water until the sugar is no longer visible. What is the mass of the sugar water mixture?

• 440 grams

• 400 grams

• 360 grams

• 40 grams

Tags

NGSS.MS-PS1-5

A student predicts that all objects with a mass greater than 9 grams will sink in water. After finding the mass of four objects, the student places each object in a pan of water to determine if it will sink or float. The results of the experiment are shown in the table below.        

Tags

NGSS.MS-PS1-2

Shown are the moon phases a student observed over a week in February.

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Tags

NGSS.MS-ESS1-1

Select two statements.

• Winter days in New Zealand are longer than summer days.

• Winter days in New Zealand are shorter than summer days.

• In New Zealand, December has the longest days.

• In New Zealand, the shortest days of the year are in September.