Semester 1 Exam review 2

Front

What happens to the surface temperature of a star when moving from left to right on an HR diagram?

Back

The surface temperature of a star decreases.

Front

What are some properties of an element?

Back

Properties of an element can include conductivity, magnetism, and hardness.

Front

What does Newton's first law state about an object's motion?

Back

An object's motion cannot change unless a force acts on it.

Front

How many Hydrogen (H) atoms are in 4NH3?

Back

There are 12 Hydrogen (H) atoms in 4NH3.

Front

What is the speed of a man who runs 10 miles in 1 hour?

Back

The speed is 10 miles/hr.

Front

What is an HR diagram used for?

Back

An HR diagram is used to classify stars based on their luminosity and temperature.

Front

Define conductivity in terms of materials.

Back

Conductivity is the ability of a material to conduct electric current or heat.

Front

What is magnetism?

Back

Magnetism is a property of materials that causes them to attract or repel other materials.

Front

What is the formula for calculating speed?

Back

Speed = Distance / Time.

Front

What is the significance of Newton's second law of motion?

Back

Newton's second law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.