STAAR Test Review

In the picture above, two teams of students are playing tug-of-war. Each team is pulling in the opposite direction, but both teams are moving in the same direction. Which of the following best describes the forces in this situation? (8.6A)

• The forces are balanced and the net force is zero.

• The forces are balanced and Team A is exerting a greater force.

• The forces are unbalanced and Team A’s force is greater.

• The forces are unbalanced and Team B’s force is greater

Tags

NGSS.MS-PS2-2

When the air is release from a balloon, the air moves out one end and the balloon moves in the other direction. Which statement does this situation best illustrate? (8.6C)

• What goes up must come down.

• For every action there is an equal and opposite reaction.

• The shape and size of an object affect air resistance.

• The acceleration due to Earth’s gravity is 9.8 m/s2.

Tags

NGSS.MS-PS2-1

Which graph best represents a car traveling down the freeway at a constant speed? (6.8D)

• a

• b

• c

• d

Tags

NGSS.MS-PS3-1

A spring scale is used to pull each of the four objects. Based on the information provided, which object experiences the greatest acceleration when pulled with 8 N of force? (8.6A)

• Object R

• Object S

• Object T

• Object U

What role do decomposers play in an ecosystem?

• They produce their own food through photosynthesis

• They consume living plants and animals

• They break down dead organisms and recycle nutrients back into the ecosystem

• They control the population of other species

Tags

NGSS.MS-LS2-3

Examine the table. Which of the objects is producing the greatest force? (8.6C)

• soccer ball

• tennis ball

• marble

• they are all the same

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Two forces are applied to a 17 kg box as shown. The box is on a smooth surface. Which statement best describes the net force and direction the box will move? (8.6)

• 7 N to the right

• 7 N to the left

• 53 N to the right

• 70 N to the right

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Scientists use telescopes to make distant objects appear closer. Some parts of a telescope are shown here. Which of the following best describes how the objective lens of this telescope helps a scientist observe the moon? (5.6C)

• The objective lens produces light.

• The objective lens blocks light.

• The objective lens reflects light.

• The objective lens refracts light.

Tags

NGSS.MS-PS4-2

Some students are feeding a crab in an aquarium. They use tongs to place the food directly in front of the crab. The students look through the side of the aquarium. They notice that the image of the tongs appears to break as the tongs enter the water. Which property of light are the students observing in this situation? (5.6C)

• Light can be refracted and separated into different colors as it moves from air to a different medium.

• Light is refracted as it moves from one medium to another medium.

• Light travels in a straight line and can be reflected off the surface of water.

• Light is absorbed by water and reflected off glass.

A student conducts an investigation by shining a flashlight toward a flat mirror. The student changes the angle of the mirror and observes the path of the reflected light. As the mirror changes direction, the light reaching the mirror can reach the ceiling because the light---(5.6C)

• travels in straight lines and reflects from the surface of the mirror

• refracts in the glass of the mirror and is spread out all over the room

• enters the mirror and changes direction when it is refracted by the back of the mirror

• travels through air and does not change its direction in air

Tags

NGSS.MS-PS4-2