Comprehensive Science Review

Which classification of matter is composed of two or more substances which are physically combined?

• atoms

• pure substances

• mixtures

• elements

Which describes homogeneous mixtures?

• composed of components which are not dissolved

• has only 1 phase visible

• has 2 or more phases visible

• the components remain recognizable

Which type of mixture has particles which are uniformly distributed?

• Homogeneous

• Heterogeneous

What type of mixture does this diagram represent?

• Homogeneous

• Heterogeneous

Mass, relative density, solubility, color, texture, state of matter, conductivity, etc.

• Physical state

• Insulators

• Physical Properties 

• Inferences

Tags

NGSS.MS-PS1-4

Molecules spread out and move FAST!

• solid

• gas

• liquid

Tags

NGSS.MS-PS1-4

The temperature at which a substance changes from a liquid to a gas

• Melting point

• Boiling point

• Freezing point

• Condensation point

Tags

NGSS.MS-PS1-4

Juan wants to know the answer to the question, “Does soil type affect how tall bean plants grow?” Which experiment would best help Juan answer this question?

• Juan decides to observe bean plants in the wild and measure their growth daily. Juan records the measurements in his science notebook.

• Juan creates a model of a bean plant and observes its growth in different soil types daily for a month. Juan shares his findings with Ms. McDonald.

• Juan goes to Ms. McDonald’s farm to observe the growth of the farm's beans. He also measures the growth of the bean plants in soil for a month.

• Juan designs an experiment in which he plants bean plant seeds in two different soil types and also plants them in his yard as a control. He then measures the growth of each bean plant daily.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-4

A scientist conducted an experiment to determine how the amount of salt in a body of water affects the number of aquatic plants that can live in the water. What is the outcome (dependent) variable?

• the amount of water

• the amount of salt in the water

• the number of aquatic plants in the water

• the water temperature

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Jason states the following prediction: “As the air temperature increases, the air in a balloon will expand, increasing the circumference of the balloon.” Which of the following identifies the test variable (independent variable) AND the outcome variable (dependent variable) for an experiment designed to test Jason’s prediction?

• material the balloon is made of and circumference of the balloon

• change in circumference of the balloon and how fast the balloon expands

• material the balloon is made of and difference in air temperature

• difference in air temperature and change in the circumference of the balloon