Seventh Eighth Science Review

The highest point of a wave is?

• crest
• trough
• point of origin
• comppression point

Force exerted between the surfaces of two objects. 

• Friction
• Inertia
• Force
• Gravity

When you step on a Lego. You push on the Lego and the Lego pushes back on you.

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law

For every action there is an equal and opposite reaction; equal in force and opposite in direction.

• Newton’s first law of motion
• Newton’s second law of motion
• Newton’s third law of motion

If you exert a net force of 8 N on a 2-kg object, what will its acceleration be?

• 2 m/s²
• 4 m/s²
• 16 m/s²
• 10 m/s²

Without any force to change it, an object at rest stays at rest and an object in motion stays in motion

• Newton’s first law of motion
• Newton’s second law of motion
• Newton’s third law of motion

After the train passed, the pitch of the train whistle became lower. This change in sound would be represented by what change in the diagram above? 

• The distance represented by C would increase. 
• The distance represented by C would decrease. 
• The distance represented by D would increase. 
• The distance represented by D would decrease. 

Sound is able to travel faster in solids than in air because the molecules in a solid are

• closer together than air molecules
• more easily moved than air molecules
• moving faster than air moleculesmoving faster than air molecules
• larger than air molecules

A reflected sound wave

• frequency
• pitch
• echo
• rarefaction

This particle determines what element you have - the elements identity.

• electron
• proton
• neutron
• valence shell

Tags

NGSS.MS-PS1-1