It is the largest organ in the human body. 

It is a group of tissues working together with a specific function.

It monitors and controls your unconscious and conscious. 

The heart contracts approximately _______times per minute. 

The control center of the human body. 

Skeletal muscles are attached to bones. They  are also called _____muscles because you can control them. 

____are responsible for filtering the blood and removing wastes from it. 

Acid deposition is also called _______.

Hydrologic cycle is also called _____.

Deposition change of the phase of matter from _____.

Sublimation change of the phase of matter from _____.

_____ is the temperature at which the liquid material turns into a gas. 

_______is used for liquid materials, whereas _____is used for solid materials. 

_______in matter results from the absence of energy or exposure to energy or exposure to energy in the form of heat. 

Matter can change without changing its ______.

Physical changes of a material are observed when changes in its physical qualities happen.

Changes in matter depend on the changes that happened in a material. these happen slowly over time. 

This change can be a change in the shape or size of a material as long as the material does not change its original composition. 

Physical change are reversible, especially if the change happens from one state to another. 

A physical change produces a new material with distinct chemical properties. 

The most popular method of waste disposal, because it is probably the easiest, is throwing wastes into a _____.

It involves burying fruit and vegetables wastes under beds of soil for them to decay so that the nutrients can be used by plants. 

This is a process wherein wastes are burned at high temperatures to generate heat that can be used as energy. 

A _____is observed when a material changes its composition as a reaction to another material. 

______can be easily observed without changing the composition of matter.

It is how heavy or how light an object is.

It is the ability of a material to be hammered into a desired shape. 

Physical properties of matter can be measured. 

Properties can be used to identify, describe, and classify materials. 

It is the perception of the sense of smell.