Know It All Friday - 8th Science - 1/14

Differences in the moon's and sun's pull on different sides of the Earth cause _________.

• gravity
• lunar phases
• tides
• dabbing

The force that pulls objects towards each other.

• gravity
• friction
• mass
• weight

Two factors that affect gravity

• mass and distance
• types of surfaces and how hard they are pushed together
• force and distance
• mass and direction

Movers slide a box down the ramp of a truck.
What helps slow the box as it slides to the bottom of the ramp?

• friction
• gravity
• inertia
• magnetism

How long will an object remain at rest, according to Newton's First Law of Motion?

• it can't rest
• until noon
• until an unbalanced force occurs
• as long as there are unbalanced forces acting on it 

For every _______ there is an equal and opposite ________. 

• reaction, action
• action, action
• reaction, reaction
• action, reaction

How is Earth's magnetic field similar to that of a magnet?

• It's shaped like a horseshoe.
• It has north and south poles.
• It is made plastic.
• It is hundreds of miles long.

What is most likely to happen when the switch is closed?

• A magnetic field should be produced
• The nail will rust
• The battery will explode
• The wire will catch on fire

The distance between 2 corresponding parts of a wave  (example- crest to crest) is its _____________________

• trough
• frequency
• amplitude
• wavelength

The amount of matter in an object is called its

• inertia.

• mass.

• force.

• balance.