Unit 1 Test 5th Grade Science

Determine which of the following scenarios would result in a chemical change.

• Ice cubes melting in a glass of water

• Wood burning in a campfire

• Butter melting in a pan

Jacob cut an apple and left it on the table while he finished his homework. When he returned to eat the apple, it looked like the apple in the picture. How did Jacob's apple change?

• Oxygen interacted with the apple and caused a chemical change.

• There was no change.

• There was a physical change.

Which kind of change alters the shape of an object without changing what type of matter it is?

• chemical change

• physical change

• gradual change

• sudden change

A ____ is a physical combination of two or more substances

• suspension

• mixture

• matter

• solution

Mixtures that have parts that are not uniformly mixed together are called ______________ mixtures.

• heterogeneous

• homogeneous

Dish soap is an example of a ______________________ mixture.

• homogeneous

• heterogeneous

Rebecca made a mixture of raisins, nuts, and dried fruit for a snack. Which kind of mixture was Rebecca’s snack?

• homogeneous mixture

• heterogeneous mixture

When salt is placed in a glass of water and dissolves, it is an example of a ____________________.

• colloid

• solution

• mixture

• none of the above

A mixture of gravel and sand is an example of a ________________ mixture.

• heterogeneous

• homogeneous

• colloid

• aerosol

Which of the following would make sugar dissolve faster in a cup of water?

• Add cold water and stir.

• Let water evaporate away

• Add warm water and stir

• Add more sugar and stir