mass and can not be created nor destroyed

H2O Unit Flashcards

1

A subscript tells us.....

the number of protons in the atom
how many atoms of that element are in the equation
the number of electrons in the atom
the atomic number

2

Ice is less dense than ________

Water vapor
Liquid water

3

The compound salt is made up of what elements

NaCl
Cl
Mg
Na

4

The equation for water is:

HO2
HO
H2O
H2O2

5

Condensation is when

Liquid changes to a solid
solid changes to a liquid
gas changes to a solid
water changes to water vapor

6

The atomic number tells us how many

the name name of the element
the number of atoms bonded together
protons and neutrons there are in the nucleus
the weight of the atom

7

Water enters the ground directly from-

underground ice
precipiation
condensation
the ocean

8

Transpiration is the term when plants evaporate

True
False

9

Cohesion is when water molecules

Stick to other polar substances
Water floats when frozen
Stick to eachother
Water dissolves substances

10

How many elements are in this compound NaClNaOHFe

5
10
7
6

11

A compound is made up of....

Sand and water
Two or more different elements combined
H2
Two or more of the same element

12

Which activity is an example of a chemical change?

Dissolving table salt in water
Burning wood to produce ashes
Hammering aluminum into thin sheets
Melting gold to make jewelry

13

Transpiration is most like which step in the water cycle?

Runoff
Condensation
Evaporation
Infiltration

14

Matter has:

Can't be measured
Can be created
Never changes phases
mass and can not be created nor destroyed

15

Adhesion is when water molecules

stick to other polar substances
combine with more hydrogen
dry out
stick to themselves

H2O Unit

Questions 15

H2O Unit

Questions 15