Forces, Densities, and Gravitational Attraction

Front

What is the law of action-reaction?

Back

The law of action-reaction states that for every action, there is an equal and opposite reaction. This means that if one object exerts a force on another object, the second object exerts a force of equal strength in the opposite direction on the first object.

Front

What happens to a skateboard when a person jumps off it?

Back

When a person jumps off a skateboard, the skateboard moves in the opposite direction of the jump due to the law of action-reaction.

Front

What is gravitational attraction?

Back

Gravitational attraction is the force that pulls two objects toward each other. The strength of this force depends on the masses of the objects and the distance between them.

Front

How does gravity affect objects on Earth?

Back

Gravity pulls objects toward the center of the Earth, giving them weight and causing them to fall when dropped.

Front

What is density?

Back

Density is the mass of an object divided by its volume. It measures how much matter is packed into a given space.

Front

How can you determine if an object will float or sink in water?

Back

An object will float in water if its density is less than the density of water (1 g/cm³). It will sink if its density is greater.

Front

What is the relationship between mass and weight?

Back

Weight is the force of gravity acting on an object's mass. Weight is calculated by multiplying mass by the acceleration due to gravity (W = m × g).

Front

What are the four main lunar phases?

Back

The four main lunar phases are New Moon, First Quarter, Full Moon, and Last Quarter.

Front

What causes tides on Earth?

Back

Tides are caused by the gravitational pull of the moon and the sun on Earth's oceans, leading to the rise and fall of sea levels.

Front

What is the significance of the highest tide phase?

Back

The highest tide phase, known as spring tide, occurs during the full moon and new moon phases when the gravitational forces of the moon and sun align.