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CHEMISTRY

Total questions: 30

Worksheet time: 17mins

Name
Class
Date
1.
The chemical compound of water is
a)
HO
b)
H2O
c)
H3O
d)
HO2
2.
Water is a universal solvent
a)
True
b)
False
3.
Pure water has a
a)
Neutral pH 
b)
Negative pH
c)
Positive pH
d)
Both Negative and Positive pH
4.
A Compound that is being dissolved is called a
a)
Solution
b)
Solute
c)
Solvent
d)
Suspension
5.
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
6.
Fish need oxygen from which molecule? 
a)
O2
b)
The O in H2O 
c)
The oxygen from a tank 
d)
None of the above 
7.
Which type of water makes soaps not work? 
a)
Hard 
b)
Soft 
8.
What do chemists add to soap to allow it to work in hard water? 
a)
nitrogen 
b)
phosphates 
c)
Artificial scents 
d)
artificial colors 
9.

Which of the following is NOT a greenhouse gas?

a)

CO2

b)

N2

c)

CH4

d)

H2O

10.

Which of the following sets of evidence supports global warming?

a)

CO2 levels rising

b)

Sea Levels rising

c)

Glacier mass decreasing

d)

All of the Above

11.

Chemical responsible for ozone depletion is

a)

CO2

b)

NO2

c)

peroxyacetyl nitrate (PAN)

d)

Chlorofluorocarbons (CFCs)

12.

Pollution _________________________.

a)

is harmful materials put into the environment

b)

found in air, water, and land

c)

effects plants, animals, and people

d)

All of the above

13.

Soil pollution refers to the contamination of soil with abnormal concentration of:

a)

toxic substances

b)

land

c)

oxygen

14.

Where is garbage taken after you throw it away?

a)

to the ocean

b)

to a landfill

c)

to space

d)

to a factory

15.

Recycling doesn't help stop soil pollution

a)

TRUE

b)

FALSE

16.

How much of the world's forest have been destroyed?

a)

50%

b)

15%

c)

90%

d)

80%

17.
What type of nutrient should you eat a lot of? 
a)
Carbohydrate
b)
Protein
c)
Fats
d)
Water
18.

Which type of biomolecules helps building and repairing tissues?

a)

Fats

b)

Carbohydrates

c)

Proteins

19.

Carbohydrates, fats, and proteins all have carbon, hydrogen, and oxygen atoms.

a)

True

b)

False

20.

Besides giving us energy, food must also...

a)

have vitamins

b)

have water

c)

provide building materials

d)

none of the above

21.

Which one is the official name of the disease given by WHO？

a)

SARS

b)

New Epidemic Disease

c)

Novel Crown Virus

d)

Corona Virus Disease

22.

The word 'corona' comes from latin and means:

a)

sun

b)

temperature

c)

lungs

d)

crown

23.

You can get the latest information about COVID-19 from WHO. What is WHO?

a)

Wow Health Organization

b)

World Health Organization

c)

Wuhan Health Organization

d)

World Happy Organization

24.

Which country did coronavirus start?

a)

Wuhan

b)

Italy

c)

China

d)

Iran

25.

COVID-19 is most likely spread from...

a)

Looking at a person who has COVID-19

b)

Cough and sneeze droplets from a person who has COVID-19

c)

Hair left behind from a person who has COVID-19

d)

Being over 65

26.

What are the main symptoms of Coronavirus?

a)

coughing and fever

b)

smiling

c)

reading

d)

singing

27.

What should you do to protect yourself from Covid-19?

a)

go to the mall

b)

go to your family's house

c)

stay at home

d)

go out with your friends

28.

Which practice prevents the spread of germs?

a)

Washing your hands often

b)

Blowing your nose

c)

Reusing the same tissue

d)

Coughing into your hand

29.

Which of these should you not touch with unwashed hands?

a)

eyes

b)

nose

c)

mouth

d)

all of the above

30.

How to prevent the virus from spreading?

a)

use face mask

b)

play in a group of friends

c)

eat a lot

d)

go shopping

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