2022 STAAR Science Release

Immediately after a forest fire, the primary consumers in the area will compete most for which biotic factor?

• Food

• Space

• Oxygen

• Sunlight

Tags

NGSS.MS-LS2-1

A steel ball is at one end of a box that is moving forward as shown. The box suddenly stops.

According to Newton's first law, what happens to the steel ball just after the box stops?

• Because of friction, the ball continues rolling forward at the same speed.

• Because of friction, the ball rolls forward at an increased speed.

• Because of inertia, the ball continues rolling forward at the same speed.

• Because of inertia, the ball rolls forward at an increased speed.

Students mixed two liquids in beaker and listed their observations.

Based on these observations, which statement contains the best evidence that a chemical reaction occurred?

• There is a change in shape.

• There is a change in volume.

• The two liquids mix into a solution.

• The two liquids form a new solution.

Tags

NGSS.MS-PS1-2

The diagram shows Earth in its orbit around the sun when very little light is visible at Earth's South Pole.

Which statement is true when Earth is in the position shown?

• It is August in the Northern Hemisphere. It is April in the Southern Hemisphere.

• It is summer in the Northern Hemisphere. It is winter in the Southern Hemisphere.

• The number of hours of daylight is greater in the Southern Hemisphere than in the Northern Hemisphere.

• Spring begins earlier in the year in the Southern Hemisphere than it does in the Northern Hemisphere.

Tags

NGSS.MS-ESS1-1

Tiny organisms called Daphnia live in lakes and ponds where they consume algae. A lake with a stable population of algae and Daphnia was contaminated by pollution, resulting in the death of many algae.

Which graph shows the most likely trend in the Daphnia population in the lake shortly before and after the pollution event?

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Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

A student pushes a 51.5 kilogram bookshelf across a smooth floor with a net force of 67N. What is the approximate acceleration of the bookshelf?

Tags

NGSS.MS-PS2-2

A topographic map provides details about Emory Peak in Big Bend National Park. A radio tower on Emory Peak is indicated.

Based on the topographic map, if a park ranger hiked due west from the radio tower, the ranger's path would--

• cross a canyon with a river running through it

• cross another peak in the park

• be flat and then go up a steep slope

• go down a steep slope and then become flatter

Tags

NGSS.MS-ESS2-2

Which pair of elements are nonmetals and gases at room temperature and normal atmospheric pressure?

• Fluorine, F and chlorine, Cl

• Boron, B and aluminum, Al

• Hydrogen, H and cesium, Cs

• Cobalt, Co, and nickel, Ni

How many neutrons are in the nucleus of a potassium atom with a mass number of 39?

Students recorded the dates in May on which they observed a full moon and a last quarter moon.

On which date will they most likely be able to observe a new moon?

• May 13

• May 18

• May 25

• May 31

Tags

NGSS.MS-ESS1-1