STAAR

(8.7B 2018-Q19)

• A

• B

• C

• D

Tags

NGSS.MS-ESS1-1

(8.7B 2018-Q30)

• F

• G

• H

• J

Tags

NGSS.MS-ESS1-1

(8.7B 2017-Q8)

• F

• G

• H

• J

Tags

NGSS.MS-ESS1-1

A large rock is motionless on a flat sidewalk. Which statement best explains why the rock remains motionless?

• There are no forces acting on the rock.

• The only force acting on the rock is directed toward the sidewalk.

• The forces acting on the rock are all balanced.

• The sidealk exerts an unbalanced force ont the rock.

A pitcher throwas a ball toward a player holding a softball bat. The player uses the bat to hit the ball. The bat applies a 10-newton force to the ball. Which statement correctly describes the reaction force to the ball?

• the reaction force is the force that causes the bat to move toward the bat.

• The reaction force is the force appliked to the bat by the player h9oling the bat.

• The reaction force is the force that pulls the ball toward the ground.

• The reaction force is the force of the ball on the bat.

Tags

NGSS.MS-PS2-1

The picture shows an aerialist walking on a tightrope an holding a balancing bar. An anction-reaction pair of forces exists between -

• F the aerialist's feet and the rope

• G the rope and the balancing bar

• H the two ends of the rope

• J the aerialist's arms and legs

Tags

NGSS.MS-PS2-2

(8.5C 2019 – Q13)

• Group 2

• Group 8

• Group 12

• Group 18

How many valence electrons aarre in an atom of each element in Group 15 in the periodic table? (Record your answer using the correct place value.)

(8.5C 2018 – Q31)

• A

• B

• C

• D

Which pair of properties describes the elements in Group 18?

• They are chemically stable and liquid at room temperature.

• They have eight balence electrons and are flammable.

• They are maganetic and boil at low temeperatures.

• They are gaseous and room temperature and chemically stable.