Study of the properties and applications of  different materials. 

Rubber is made from the milky juice of rubber trees called _____.

It is a combinations of two or more metals tat result in improved property of the metal. 

Ceramics are made of clay shaped int desired forms and hardened in a high-temperature oven called _____.

The tendency of liquid to vaporize. 

Combustible materials are less volatile and have a higher range of temperatures to ignite.

A ____involves chemical reactions that cause new substances or products to be formed. 

It is a chemical reaction that requires fuel, a supply of oxygen gas, and a source of heat to set fire or ignite fuel. 

Caused by the chemical reaction between the metal and the moisture in the air. 

An observable changes in the appearance or property of an object without the object changing into a new substance. 

_____is a change of the phase of matter from  liquid to gas. 

_____is a change of the phase of matter from  solid turns into a liquid. 

Liquid substances may turn into solid by ______them.

The ______could potentially pollute the rivers, streams, and groundwater.

To ____means to take energy or materials from wastes that can no longer be of use. 

To____is to maximize the use of something that you already have instead of buying a new  one. 

It consists of different organs that are responsible for producing and transporting the male reproductive cell, which is called ______.

Two reproductive glands that produce sperm and release the male sex hormone testosterone. 

The ductus deferens is also called ______.

A narrow fibromuscular tube that transmits both urine and semen outside the body. 

Sperm cells cannot survive at regular body temperatures, but thy can survive at slightly cooler temperatures within the scrotum. 

It is composed of sperm cells mixed with seminal fluid. 

The human female reproductive system is responsible for producing the female sex cel, which is called _____.

______is responsible for the development of secondary sex characteristics such as wider hips, enlarged breast, and the presence of pubic and armpit hair. 

Fallopian tubes are also known as ____. 

It is also known as the womb. 

It is called birth canal because this part is the passageway where the baby is normally delivered. 

The puberty age for females is between the age 10 and 14. For males, puberty starts between the age of 12 and 16. 

The first menstrual flow, also termed as ______, is the beginning of menstruation.

Puberty is the age stage where the body experiences changes in physical, emotional, and social aspects in both male and female.