Characteristics of life assesment

Characteristics of life

Made of one or more cells, contain hereditary information, grow and develope, reproduce, obtain and use energy, respond to stimuli, maintain homeostasis, populations adapt over generations

atom

Smallest unit of an element that keeps that element’s properties

Element

Pure substance made of one type of atom

Molecule

Two or more atoms chemically bonded

Compound

Substance containing atoms of two or more different elements

Proton charge and location

+1 charge nucleus

Neutron

0 charge nucleus

electron

-1 charge nucleus

What is the atomic number equal to

The number or protons

Polar

the molecule has unequal regions of charge

Hydrogen Bonds

an attraction between separate water molecules

Cohesion

When water sticks to water

Adhesion

When water sticks to other substances

Surface tension

Cohesion pulls surface water molecules tightly together, creating a flexible surface layer.

Capillary action

Adhesion pulls water along a surface while cohesion pulls more water molecules with it.

High specific heat

how much energy a substance needs to change temperature

What is water’s specific heat?

Water can absorb or release a large amount of heat before its temperature changes very much. Hydrogen bonds absorb energy as they break and release energy as they form