Physical Science

Question 1

Radiation

Answer 1

If the transfer of heat substance

Question 2

Convection

Answer 2

Is the transfer. Of heat through a liquid or gas

Question 3

Conduction

Answer 3

Is through touch

Question 4

Physical properties

Answer 4

Physical properties are used to observe and describe matter.

Question 5

Physical changes

Answer 5

Physical changes occur when objects or substances undergo a change that does not change their chemical composition. This contrasts with the concept of chemical change in which the composition of a substance changes or one or more substances combine or break up to form new substances.

Question 6

Chemical changes

Answer 6

Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. These processes are called chemical reactions and, in general, are not reversible except by further chemical reactions.

Question 7

Average speed

Answer 7

average speed of an object is the total distance traveled by the object divided by the elapsed time to cover that distance. It’s a scalar quantity which means it is defined only by magnitude. A related concept, average velocity, is a vector quantity. A vector quantity is defined by magnitude and direction

Question 8

Velocity

Answer 8

the speed of something in a given direction.

Question 9

Friction

Answer 9

the resistance that one surface or object encounters when moving over another

Question 10

Newtons first law

Answer 10

The focus of Lesson 1 is Newton’s first law of motion - sometimes referred to as the law of inertia. An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

Question 11

Newtons second law

Answer 11

Newton’s second law of motion can be formally stated as follows: The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.

Question 12

Newtons third law

Answer 12

For every action there is a reaction

Question 13

Force

Answer 13

Force is a push or pull

Question 14

Chemical properties

Answer 14

chemical property. noun. … a property or characteristic of a substance that is observed during a reaction in which the chemical composition or identity of the substance is changed: Combustibility is an important chemical property to consider when choosing building materials.