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Biblioteka

Unit 1 Properties of Water Test - version B

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Pitanje 1
1.

What percentage of the Earth is covered in water?

Pitanje 2
2.

What does turbidity of water measure?

Pitanje 3
3.

In a water molecule, the oxygen atom is

Pitanje 4
4.

What is cohesion?

Pitanje 5
5.

The primary contributor to the salinity of saltwater is

Pitanje 6
6.

What is adhesion?

Pitanje 7
7.

What percentage of freshwater is readily available for consumption?

Pitanje 8
8.

What percentage of all the water on Earth is freshwater?

Pitanje 9
9.

Why does ice (solid water) float in liquid water?

Pitanje 10
10.

Because water is able to dissolve most things, it is known as the

Pitanje 11
11.

Which of the following scenarios is an example of cohesion

Pitanje 12
12.

The specific heat capacity of water is

Pitanje 13
13.

Saltwater freezes at

Pitanje 14
14.

Certain insects can "walk on water" due to the _______ of water, created by ______.

Pitanje 15
15.

How many hydrogen atoms does each water molecule have?

Pitanje 16
16.

What property allows water to stick to glass ?

Pitanje 17
17.

Which of the following is more electronegative (has more of the negative charge) in a water molecule?

Pitanje 18
18.

Numbers higher than a 7.1 on the pH scale are a(n)

Pitanje 19
19.

The pH of pure water is

Pitanje 20
20.

Maria, after finding no cold sodas in the refrigerator, placed a can of soda in the freezer. She then proceeded to check her social networking site and forgot about the soda. Later that evening her brother went to get some ice and it was brown. Maria’s soda can had split open. What is the best explanation for what happened?

Pitanje 21
21.

Water molecules are polar.

This means...

Pitanje 22
22.

Which is the strongest base?

Pitanje 23
23.

What is the charge on the hydrogen end of the molecule shown in the picture?

1
Pitanje 24
24.

According to the picture, how cold is the air temperature?

1
Pitanje 25
25.

According to the picture, how cold is the water temperature?

1
1
Pitanje 28
28.

In a water molecule, the angle between the hydrogen atoms is how many degrees?

Pitanje 29
29.

Brackish water has a higher salinity than saltwater.

Pitanje 30
30.

Which of the following is true about the pH levels of acids and bases?

Pitanje 26
26.

Where is it warmer in the picture?

Pitanje 27
27.

How does the layer of ice at the surface affect the water and the fish below the surface?