Science

The health of a water system is determined by the balance between what variables (choose all that apply)?

• physical

• physiological

• biological

• chemical

_{Gasses do not have a shape or volume of their own. You cannot see most gasess.}

• True
• False

The tightness across the surface of water that enables paper clips to float is ____________.

• adhesion
• capillary action
• surface tension
• polarity

Which end of the water molecule has a slightly negative charge?

• the oxygen end
• the hydrogen end
• both ends are slightly positive
• neither end is positive

How many protons does an atom of Carbon have? 

• 3
• 12.011
• 6
• none

The more mass an object has, the more gravity it has.

• True
• False

Which item on this element square is the chemical symbol?

• Copper
• 29
• Cu
• 63.546

Water droplets take a spherical shape (as pictured) because of ____________

• adhesion
• cohesion
• capillary action
• solubility

What is the number of protons that the element in this image contain?

• 14
• 7
• 15
• 18

_{Solid have a certain shape and a volume of their own. Solid are something you can touch.}

• True
• False