2024 STAAR Test Practice 2 (7th grade TEKS)

This question has two parts. First, answer Part A. Then answer Part B.

Which is the fastest segment of Kara's trip?

• between hour 1 and 2

• between hour 2 and 3

• 
  between hour 3 and 4

• between hour 4 and 5

Tags

NGSS.MS-PS3-1

Part B

Which statement BEST supports your answer to Part A?

• Between hours 1 and 2, the line has a gentle slope which refers to the bike's speed being fast.

• 
  Between hours 2 and 3, the straight line describes the bike moving at a constant speed.

• Between hours 3 and 4, the steep line shows the bike increasing a greater distance in an hour which means a quicker speed.

• Between hours 4 and 5, the line is steeper than the line between hours 1 and 2 which means the bike is moving at a faster speed.

Tags

NGSS.MS-PS3-1

The distance-time graph shows the motion of a car. Which two spots show the car at rest?

Select TWO correct answers.

The wind is moving 2 miles per hour (mph) due east and continues to move at this speed and direction. How far will a hot air balloon move in 90 minutes in these conditions?

• 1.0 miles

• 2.0 miles

• 3.0 miles

• 4.0 miles

What is the average speed of both students?

Enter the correct answer in the box.

Round the answer to the nearest tenth. (don't include the unit)

Mrs. Johnston heated 5 grams of sugar. The sugar first looked shiny, then melted and became dark brown. Finally, all that was left was a black, glossy residue. She then heated 5 grams of sand in the same way. There was no change in the appearance of the sand.

What happened to the substances?

Select TWO correct answers.

• Sand is an element, and sugar is a compound.

• Heating the sugar caused both a chemical change and a physical change.

• Heating the sand caused a chemical change.

• Heat only caused physical changes in both the sand and sugar.

• Heating the sand caused a physical change.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

NGSS.MS-PS1-4

A student is creating a table of evidence of physical and chemical changes.

Groups:

(a) Physical Change

,

(b) Chemical Change

• chopping wood

• digesting food

• melting ice cream

• rotting food

• starting a fire

• rusting metal

• boiling water

• breaking a pencil

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Organize these options. Determine if each of the following is evidence of a physical or chemical change.

Move the answers to the correct boxes. into the right categories

Groups:

(a) Physical Change

,

(b) Chemical Change

• Substance dissolves

• New substance forms

• Temperature increases

• Substance evaporates

• Substance melts

• Precipitate forms

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

How many atoms, in total, are in the chemical formula below?

Co(NO₃)₂

Enter the correct answer in the box.

There are_____atoms in total.

Tags

NGSS.MS-PS1-1

6CO₂ + 6H₂0 + Sunlight → C₆H₁₂0₆ + 60₂

In the above formula, how many atoms of Hydrogen are on the product side of the equation?

• 6

• 2

• 13

• 12

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-1