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science

Total questions: 20

Worksheet time: 15mins

Name
Class
Date
1.
The main human activity that releases greenhouse gases is
a)
using bottled water
b)
burning fossil fuels
c)
texting on cellphones
d)
eating meat
2.
Worldwide, temperatures have been increasing for more than 100 years.  Is this evidence of global warming?
a)
yes
b)
no
3.
What is the greenhouse effect?
a)
warming of the earth due to gases in our atmosphere.
b)
cooling of the earth due to gases in our atmosphere
4.
What is recycling?
a)
is to use materials again and again to make something new.
b)
is produce new brand products and sell them.
c)
is living in the developed world but taking care of the nature.
d)
is classify garbage in different colors.
5.
Do we need greenhouse gases on Earth?
a)
Yes - they keep the Earth warm
b)
Yes - they keep all the gases on our planet
c)
No - they only cause terrible climate change
d)
No - they only block some of the Sun's rays
6.
Which of these is a MAJOR cause of acid rain?
a)
spraying pesticides on crops
b)
burning fossil fuels for energy
c)
dumping sewage in river systems
d)
using uranium to generate electricity
7.
How is acid rain formed?
a)
Carbon monoxide and carbon dioxide mix with water in the ocean.
b)
Carbon dioxide and oxygen mix with water in the air.
c)
Sulfur dioxide and carbon monoxide mix with lake water.
d)
Sulfur dioxide and nitrogen oxide mix with water in the air.
8.
Which of these is an impact of acid rain?
a)
dissolves nutrients in the soil
b)
raises oxygen levels
c)
gives off chemicals
d)
reduces the amount of coal used
9.

What harmful health effects do scientist say that the UV radiation that passes through our "shield" will cause?

a)

increase in skin cancer

b)

immune deficiencies

c)

cataracts

d)

all of the answers

10.

Is this good for us?

a)

yes

b)

no

11.

Is this good for us?

a)

yes

b)

no

12.

Is this good for us?

a)

yes

b)

no

13.

Is this good for us?

a)

yes

b)

no

14.
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
15.
Smog is an example of ______________ pollution.
a)
land
b)
water
c)
air
d)
noise
16.

The following structures involved in male reproductive system :

a)

Scrotum

b)

Seminal Vesicle

c)

Cervix

d)

Sperm duct

e)

Ovary

17.

Which structure in male reproductive system produce sperm?

a)

Scrotum

b)

Testis

c)

Urethra

d)

Seminal Vesicle

18.

Which structure in male reproductive system that transport the sperm out of the body?

a)

Testis

b)

Sperm duct

c)

Urethra

d)

Seminal vesicle

19.

Which structure in female reproductive system produce ovum?

a)

Fallopian tube

b)

Ovary

c)

Uterus

d)

Cervix

20.

Which structure in female reproductive system where the fertilisation occur?

a)

Uterus

b)

Ovary

c)

Vagina

d)

Fallopian tube

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