STAAR Biology Released

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

• Rusting of iron

• Burning of gasoline

• Dissolving sugar in water

• Cooking an egg

A student uses the setup shown to investigate ways to speed up evaporation. Which forms of energy are being compared in the student's investigation?

• light and electrical

• mechanical and electrical

• light and thermal

• mechanical and thermal

Tags

NGSS.MS-PS3-4

A student recorded the time it took for all the water in a puddle on a sidewalk to evaporate after a rain. Which kind of energy causes water to evaporate?

• light energy from streetlights

• sound energy from passing cars

• thermal energy from the environment

• mechanical energy from nearby streets

Tags

NGSS.MS-ESS2-4

NGSS.MS-PS1-4

A science class is observing a pet turtle in a small plastic pool. The students turned on a portable camping lamp that is clamped on to a counter next to the pool. Which kind of energy is used by the portable lamp to produce light?

• mechanical energy because the lamp is clamped on to the counter

• thermal energy because the lamp increases the temperature of the water

• electrical energy because the lamp is battery-operated

• sound energy because the lamp vibrates when clicked on

A beaker with 115 mL of solution has a temperature of 21 degrees Celsius. The solution contains 5 g of salt and 115 mL of water. Students add two ice cubes to the solution and then stir the solution for 3 minutes.

Which properties of the solution changed as the ice cubes melted?

• The color and physical state of the solution changed.

• The temperature, mass, and volume of the solution changed.

• The temperature, mass, and volume of the salt changed.

• The physical state (solid, liquid, or gas) and temperature of the solution changed.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

For an investigation a student put 100 mL of water at room temperature into each of three beakers. Then the student added a coin to Beaker R, 3 g of powdered drink mix to Beaker S, and 10 mL of lamp oil to Beaker T. The student stirred the contents of the beakers and then left them sitting on a lab table for 5 minutes. Which diagram shows what the student most likely observed in each of the beakers after 5 minutes?

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Tags

NGSS.MS-PS1-2

Which of the following is a characteristic of prokaryotic cells?

• A) They have a nucleus.

• B) They lack a cell membrane.

• C) They have membrane-bound organelles.

• D) They lack a nucleus.

What is the primary function of the mitochondria in eukaryotic cells?

• A) Photosynthesis

• B) Protein synthesis

• C) Energy production

• D) Lipid storage

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-3

In a DNA molecule, which of the following base pairs is correct?

• A) Adenine - Thymine

• B) Cytosine - Thymine

• C) Guanine - Adenine

• D) Thymine - Guanine

Tags

NGSS.MS-LS3-1

Which process is responsible for the movement of water across a semipermeable membrane?

• A) Diffusion

• B) Osmosis

• C) Active transport

• D) Facilitated diffusion