Chapter 1- Basics

Question 1

Definition of electrons

Answer 1

The negatively charged particle of an atom

Question 2

Name some chemical compounds

Answer 2

Water
Oxygen
Salt
Carbon Dioxide

Question 3

What is physical change and examples

Answer 3

Does not change the identity of the substance.
Ex;
Wax melting
Ice melting
Boiling water

Question 4

What is chemical change and examples

Answer 4

Can only be seen by changing the substance 
Ex;
Flamability
Combustion
Hydrochrolic acid and sodium

Question 5

Formula for density

Answer 5

D=m/v

Question 6

Essential parts of a graph

Answer 6

Scale
Title
Data
X and Y axis
Label axis

Question 7

Describe variable, independent variable, dependent variable and control group.

Answer 7

Variable: factor that changes

Independent variable: Controlled by experiment

Dependent variable: The result/ Responding variable

Control group: Stays the same

Question 8

Steps of the scientific method

Answer 8

1. State the problem
2. Background information
3. Form a hypothesis
4. Experiment
5. Record and Analize data
6. State a conclusion

Question 9

metric prefixes and units

Answer 9

Milli(m): 0.001

Centi(c): 0.01

Kilo(k): 1.000

Gram(g): Mass

Liter(l): Volume (dm3)

Meter(m): 3.280

Question 10

Lab safety rules

Answer 10

• Wear goggles
• Tie long hair
• No food in te lab

Question 11

What are some chemical reactions?

Answer 11

Combustion
Carbonation
Magnesium and Hydrocrolic acid
Hydrogen and Oxygen

Question 12

List some units

Answer 12

Meter (lenght) 
Kilometer
Centimeter
Gram 
Liter
Celcius

Question 13

List some prefixes

Answer 13

Mega
Milli
Deca
Kilo
terra