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Bell Work 9-25-23

Total questions: 10

Worksheet time: 5mins

Name
Class
Date
1.
What is the reason why oil and water don't mix?
a)
Oil is too heavy to mix with water
b)
Water can only mix with polar molecules 
c)
Water can only mix with non-polar molecules
d)
Oil is too light to mix with water 
2.

What do we call the part of the graph where the line starts to flatten out?

a)

carrying capacity

b)

logistical growth

c)

exponential growth

3.
Why can water have no net charge but have slight charges in different parts of the molecule?
a)
The oxygen end is slightly negative and the hydrogen end is slightly positive
b)
The hydrogen end is slightly negative and the oxygen end is slightly positive
c)
The hydrogen and oxygen ends change in polarity
d)
Because it is hydrophobic
4.

What would happen if producers were removed from this food web?

a)

primary consumers would become primary producers

b)

Hunger Games

c)

there would not be anything for primary consumers to eat, so everything would start to die.

d)

nothing

5.
Continued depletion of the ozone layer will most likely result in
a)
an increase in skin cancer among humans 
b)
a decrease in atmospheric pollutants 
c)
an increase in marine ecosystem stability 
d)
a decrease in climatic changes
6.

covalent bonds

a)

bonds created by sharing electrons

b)

a weak bond between two molecules created by opposite charges

c)

sticking together of particles of the same substance

d)

property of molecules sticking to other materials due to polarity

7.

cohesion

a)

bonds created by sharing electrons

b)

a weak bond between two molecules created by opposite charges

c)

sticking together of particles of the same substance

d)

property of molecules sticking to other materials due to polarity

8.
What word describes when water is attracted to other substances?
a)
cohesion
b)
adhesion
c)
capillary action
d)
surface tension
9.
molecule in which opposite ends have opposite electric charges
a)
cohesion
b)
polar molecule
c)
hydrogen bond
d)
solution
10.
Why does ice float?
a)
As water freezes, it expands and its density decreases.
b)
As water freezes, it takes up more hydrogen from the atmosphere, causing it to have a greater buoyancy.
c)
As water freezes, air becomes trapped between the hydrogen bonds of water molecules.
d)
As water freezes, it takes up more oxygen from the atmosphere, causing it to have a greater buoyancy.