Science STAAR

In the classroom demonstration shown to the left, a rubber ball is dropped from Position 1. The ball bounces as shown. At which of these positions does the ball have both the greatest kinetic energy and the least potential energy? (6.8A)

• Position 1

• Position 2

• Position 3

• Position 4

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

The drawing shows two identical airplanes at an air show. The airplanes are flying at the same speed. Airplane W is flying 50 m higher than Airplane X. Which statement best describes the energy of the two airplanes? (6.8A)

• Airplane W has a greater kinetic energy than Airplane X.

• The two airplanes have the same gravitational potential energy but different kinetic energies.

• Airplane X has more gravitational potential energy than Airplane W.

• The two airplanes have the same kinetic energy but different gravitational potential energies

Tags

NGSS.MS-PS2-4

NGSS.MS-PS3-2

Students slid a small wood block along a flat tabletop for a distance of 1.6 m. The data show the motion of the block of wood. Which graph displays the motion of the wood block? (6.8D)

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Tags

NGSS.MS-PS3-1

A student graphed the position of a cart during a 7-second time interval. Which statement best describes the cart? (8.6B)

• The cart was stationary with a velocity of 0 m/s for the entire 7 seconds.

• The cart was stationary except for a short burst of acceleration of 0.5 m/s² .

• The cart moved at a constant velocity of 0.5 m/s for the entire 7 seconds.

• The cart accelerated at a constant rate of approximately 0.8 m/s² .

Tags

NGSS.MS-PS3-1

A meteor moving 468 km per minute traveling in a south-to-north direction passed near Earth in 2013. Because the meteor was only 45 m wide and was 27,700 km above Earth’s surface, it was not visible without the aid of a telescope. Which statement describes the meteor’s motion?

• Its velocity was 7.8 km/s northward.

• Its acceleration was 468 km/s².

• Its speed was 468 km/s northward.

• Its acceleration was 7.8 km/s².

Tags

NGSS.MS-PS3-1

Are the forces acting on the sled in Section 1 balanced or unbalanced? The track is smooth and frictionless.

• Balanced
• Unbalanced

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Are the forces acting on the sled in Section 3 balanced or unbalanced? The track is smooth and frictionless.

• Balanced
• Unbalanced

Tags

NGSS.MS-PS2-2

Are the forces acting on the sled in Section 4 balanced or unbalanced? The track is smooth and frictionless.

• Balanced
• Unbalanced

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-5

What is the net force?

• 5000 N right
• 4000 N right
• 40 N left
• 4000 N left

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Forces that have a net force of zero ( the object is still).

• Balanced force
• Unbalanced force

Tags

NGSS.3-PS2-1