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ES ch 2 test(sections 1 & 2

Total questions: 20

Worksheet time: 11mins

Name
Class
Date
1.

In the law of conservation of matter ________ or __________ changes can take place in chemical reactions however, no atoms are created or destroyed.

a)

physical

b)

chemical

c)

both of these apply 

d)

none of these apply 

2.

chlorine

a)

Cl

b)

N

c)

P

d)

S

3.

Sulfur

a)

Cl

b)

N

c)

P

d)

S

4.

nitrogen

a)

Cl

b)

N

c)

P

d)

S

5.

phosphorus

a)

Cl

b)

N

c)

P

d)

S

6.

Electrons are subatomic particles that carry a negative charge and are found  in the nucleus 

a)

true

b)

false

7.

Matter is organized into atoms, ions, and molecules which together make up elements and compounds 

a)

true

b)

false

8.

Imagination, creativity and intuition are vital tools in science 

a)

true

b)

false

9.

The results in science can be (check all that apply)

a)

tentative 

b)

reliable

c)

unreliable

d)

absolute truth

10.

To understand patterns, scientists (check all that apply)

a)

take measurements

b)

experiment & create models

c)

make careful observations

d)

make random observations

11.

A scientific theory (select all that apply) 

a)

has been widely tested

b)

is supported by extensive evidence

c)

is accepted as a useful explanation

d)

is absolute truth

12.

Science  is always able to prove  or disprove with 100% certainty how systems work in nature 

a)

true

b)

false

13.

A step in critical thinking is to look at evidence and evaluate it 

a)

true

b)

false

14.

A good scientist will be curious, skeptical, and always  observing 

a)

true

b)

false

15.

Scientists discover how nature works through guessing and observing  patterns 

a)

true

b)

false

16.

Matter has mass and takes up space in 4 physical states(solid, liquid, gas, & vapor)

a)

true

b)

false

17.

Protons are in the nucleus and have no charge 

a)

true

b)

false

18.

The smallest building block of matter is an 

a)

atom

b)

proton

c)

electron

d)

neutron

19.

Carbon  is an important element. What is the symbol for carbon?

a)

CC

b)

cc

c)

c

d)

C

20.

To find out how nature works, scientists (check all that apply)

a)

collect data

b)

develop laws

c)

develop theories

d)

watch netflix