Free Printable Science mixed bag

1.

Amoeba and paramecium are examples of what?

a)

protists

b)

Tissues

c)

protozoans

d)

organisms

2.

Who discovered bacteria?

a)

Louis pasteur

b)

Evangelista Torricelli

c)

Antonie van leeuwenhoek

d)

Albert Einstein

3.

(a) is the process of coating one metal over another, using electricity.

4.

Torricelli Invented the aneroid barometer. True or false?

a)

True

b)

False

5.

Which of the following is a balanced and chemically possible (based on the reactivity series) chemical equation?

a)

$Mg+2H_2O\ \longrightarrow\ MgO+2H_2$

b)

$4Na+H_2O\ \longrightarrow\ 4NaOH$

c)

$Cu+H_2O\ \longrightarrow\ CuO+H_2$

d)

$2K+2H_2O\ \longrightarrow\ 2KOH+H_2$

6.

Bacteria multiply by (a) .

7.

Which of the following is not a polyester made from petroleum products?

a)

Dacron

b)

Nylon

c)

Terylene

d)

Terene

8.

Which of the following are thermoplastics?

a)

Polyvinyl Chloride (PVC)

b)

Epoxy

c)

Kevlar

d)

Teflon

9.

X pushes a box with a force of 20/17 N. Y pushes with a force 18/34N in the opposite direction. What is the resultant force?

a)

11/17N

b)

29/17N

c)

22/34N

d)

58/34N

10.

A force of 63N is applied on an Area of 9 cm^2. What is the pressure in pascals?

a)

70Pa

b)

7Pa

c)

7000Pa

d)

700Pa

11.

Which of the following are examples of ways to reduce pressure?

a)

Sharpening a knife

b)

Flat bottom shoes (compared to high heels)

c)

Making the tires of a truck thinner

d)

Thickening the beak of a woodpecker

12.

Density is ________________________________.

a)

Volume per unit area

b)

Volume per unit mass

c)

Mass per unit volume

d)

Force per unit mass

13.

Objects appear to be lighter in water because of (a) .

14.

Gravitational force is a contact force. True or false?

a)

False

b)

True

15.

Identify.

a)

Bacilli

b)

Spirogyra

c)

Cocci

d)

Nostoc

16.

The Aedes aegypti mosquitos are vectors of ________________.

a)

Malaria

b)

Amoeba dysentery

c)

Dengue

d)

Cholera

17.

Vacuoles in animal cells are ___________________________.

a)

Small and permanent

b)

Big and temporary

c)

Small and temporary

d)

Big and permanent

18.

The cell walls of Adjoining cells are cemented together by the (a) .

19.

Which of the following can be made from nitrogen?

a)

trinitrotoluene(TNT)

b)

nitroglycerine

c)

nitrocellulose

d)

Ammonia gas

20.

(a) is used to make the body of space shuttles (Which metal)?

21.

Choose the odd one out.

a)

Rayon

b)

Dacron

c)

Acrylic

d)

Cotton

Science mixed bag

Total questions: 21

Worksheet time: 11mins

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