Science Pass

Which law of motion predicts that a moving hockey puck will continue to move in the same direction at the same speed unless acted upon by another force?

• Newton's First Law of Motion

• Newton's Second Law of Motion

• Newton's Third Law of Motion

• Newton's Law of Universal Gravitation

Answer explanation

Newton's First Law of Motion states that an object in motion will stay in motion unless acted upon by an external force, explaining why a moving hockey puck will continue in the same direction at the same speed.

The force of an object, with a certain mass accelerating at a certain rate, can be determined by using the equation below.

force = mass x acceleration

Which object would have the greatest force?

• A 5 kg object accelerating at 10 m/s

• A 5 kg object accelerating at 20 m/s

• a 20 kg object accelerating at 4 m/s

• a 20 kg object accelerating at 3 m/s

Answer explanation

Choose the 5 kg object accelerating at 20 m/s as it would have the greatest force based on the equation force = mass x acceleration.

Tags

NGSS.MS-PS2-2

According to Newton's Third Law of Motion, if Mike pushes down on the springboard to being his dive, what is the reaction force?

• Mike splashing into the water

• The springboard pushing Mike into the air

• The height of the water when Mike enters the water

• The sound the board makes as he pushes into the air

Answer explanation

According to Newton's Third Law of Motion, the reaction force when Mike pushes down on the springboard is the springboard pushing Mike into the air.

Tags

NGSS.MS-PS2-1

What is the net force?

• zero N

• 10 N

• 77 N

• 13 N

Answer explanation

To find the net force, we need to add the forces together. 45 N - 32 N = 13 N. Therefore, the net force is 13 N.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What is the term for the amount of matter in an object?

• Weight

• Density

• Mass

• Volume

What is the process by which plants release water vapor into the air through their leaves?

• Condensation

• Transpiration

• Evaporation

• Precipitation

Tags

NGSS.MS-ESS2-4

What is the primary function of the chloroplasts in plant cells?

• To break down sugar molecules to release energy

• To store water and nutrients

• To capture light energy and convert it into chemical energy

• To control the entry and exit of substances in and out of the cell

Tags

NGSS.MS-LS1-6

NGSS.MS-LS1-7

What is the term for the movement of particles from an area of higher concentration to an area of lower concentration?

• Osmosis

• Diffusion

• Active transport

• Endocytosis

Which of the following is NOT a renewable resource?

• Solar energy

• Wind energy

• Coal

• Hydroelectric power

What type of symbiotic relationship benefits one organism without harming the other?

• Mutualism

• Commensalism

• Parasitism

• Predation