7th Grade 1st Semester Review Part 2

Front

What is gravitational pull?

Back

Gravitational pull is the force that causes massive objects to attract other objects towards them.

Front

How many Hydrogen atoms are in the chemical equation 2H₂ + O₂ → 2H₂O?

Back

There are 4 Hydrogen atoms on the product side.

Front

What is the difference between velocity and speed?

Back

Velocity has a direction associated with it, while speed has no specific direction.

Front

How many Sulfur atoms are in Cr(SO₄)₃?

Back

There are 3 Sulfur atoms.

Front

How far does a person travel in the first 5 seconds according to the graph?

Back

The person travels 5 meters.

Front

What is the formula for calculating speed?

Back

Speed = Distance / Time.

Front

What is the definition of velocity?

Back

Velocity is the speed of an object in a specific direction.

Front

What is the role of friction in motion?

Back

Friction is a force that opposes the motion of an object.

Front

What is torque?

Back

Torque is a measure of the force that can cause an object to rotate about an axis.

Front

What is the law of conservation of mass?

Back

The law states that mass is neither created nor destroyed in a chemical reaction.