STAAR Science Category 2

A student observes ice forming on the edge of a school building. At what temperature did the water outside the school building most likely begin to change to ice?

• 100*C

• 32*C

• 25*C

• 0*C

Tags

NGSS.MS-PS1-4

The temperature at which a substance changes from liquid to gas (for water this is 100 degrees Celsius, 212 degrees Fahrenheit)

• boiling point

• melting point

• evaporation

• condensation

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Students prepare a solution of instant tea and place 30 mL of the solution in a Petri dish. Which answer choice best explains what happens to the solution when it is placed in a dry, warm location for 3 days?

• The solution will evaporate and the Petri dish will be empty.

• The solution will not change.

• The water will  evaporate and the instant tea will remain in the Petri dish.

• The water will condensate and the instant tea will remain in the Petri dish.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Solubility is a measure of:

• The concentration of a homogeneous mixture

• The concentration of a heterogeneous mixture

• How easily a substance dissolves into another substance

• How easily a substance will dissolve a substance

Tags

NGSS.MS-PS1-2

What is the primary function of the chloroplasts in plant cells?

• To break down sugar molecules to release energy

• To store water and nutrients

• To capture light energy and convert it into chemical energy

• To control the entry and exit of substances in and out of the cell

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

In the water cycle, which process involves water vapor cooling and changing into liquid water?

• Evaporation

• Condensation

• Precipitation

• Transpiration

Tags

NGSS.MS-ESS2-4

What is the process by which plants release water vapor into the air through their leaves?

• Condensation

• Transpiration

• Evaporation

• Precipitation

Tags

NGSS.MS-ESS2-4

What is the term for the amount of matter in an object?

• Weight

• Density

• Mass

• Volume

Which of the following is a chemical change?

• Dissolving salt in water

• Boiling water

• Burning wood

• Melting ice

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is an example of a physical change?

• Rusting of iron

• Burning of gasoline

• Dissolving sugar in water

• Cooking an egg