7th Grade Honors

A student is riding a skateboard. He hits a curb causing the skateboard to stop, while he continues to move forward. Which law best explains the situation?

• The law of inertia, which states that for every action there is an equal and opposite reaction.

• The law of action-reaction, which states that for every action there is an equal and opposite reaction.

• The law of inertia, which states that an object in motion will remain in motion until acted upon by an unbalanced force.

• It is a chemical change because the simple sugars have different properties than the original substance.

The diagram shows the prevailing winds at different latitudes of Earth.

What is most responsible for the patterns shown in the diagram?

• The mass and shape of Earth

• The distance between Earth’s poles

• The position of Earth in the solar system

• The uneven heating of Earth by the Sun

Tags

NGSS.MS-ESS2-6

The diagram below shows two different forces acting on a cyclist riding a bicycle.The total mass of the cyclist and the bicycle is 100.0 kg. Based on this information, what is the acceleration of the cyclist? Enter your answer in the box provided.

Tags

NGSS.MS-PS2-2

Taylor placed her bag on the hook when she got home as shown above. Which forces are acting on the bag? Move each force to the correct box in the statement. Not all answers will be used.The bag is the____  force and the hook is the​​​​​___  force.

• action

  reaction

• friction

  mass

• reaction

  action

• mass

  friction

Tags

NGSS.MS-PS2-2

A student jumps off a sled toward the west after it stops at the bottom of an icy hill.

Based on the law of action-reaction, in what direction will the sled most likely move as the student jumps off?

• North

• South

• East

• West

Tags

NGSS.MS-PS2-1

Hot gases from jet engines are expelled out from the back of a plane. The gases produce a thrusting force that moves the plane forward. Which statement describes how this is an example of one of Newton’s laws of motion?

• It is an example of Newton’s first law of motion because the plane is moving at a constant speed.

• It is an example of Newton’s third law of motion because the plan is moving at a constant speed.

• It is an example of Newton’s first law of motion because the force of the gades creates an equal and opposite thrusting force that moves the plane.

• It is an example of Newton’s third law of motion because the force of the gases creates an equal and opposite thrusting force that moves the plane.

A student models convection currents in a laboratory activity.

How are the convection currents in the student’s model different from the convection currents in Earth’s atmosphere and oceans?

• Cools air in Earth’s atmosphere

• Convection cells in Earth’s atmosphere and oceans flow in the same direction instead of opposite directions.

• The heat source for Earth’s atmosphere and oceans is the sun, which heats from above instead of below.

• The warm air in Earth’s atmosphere and the warm water in Earth’s oceans sink instead of rise.

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

Which statement is NOT correct about the movement of jet streams?

• Jet streams blow from west to east on Earth.

• Jet streams are mainly located in the tropopause.

• Jet streams are uniform throughout the year and do not shift.

• Jet streams are caused by differences in air mass temperatures.

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

A go-cart with a mass of 200 kg is pushed with a force of 1000 N (1000 kg m/s²). What is the acceleration of the go-cart, inm/s²?

Tags

NGSS.MS-PS2-2

The table shows the acceleration of a ball being kicked by a student.

Using Newton’s second law, which statement is supported by the table?

• When the force on an object is constant, a decrease in mass results in greater acceleration.

• When the force on an object is constant, an increase in mass results in greater acceleration.

• When the mass of an object is constant, an increase in force results in greater acceleration.

• When the mass of an object is constant, a decrease in force results in greater acceleration.

Tags

NGSS.HS-PS2-1