Y 9 Chemistry

Homework 8 April

• Select short report on a chemical problem issue

• Select 3 words and make a glossary of terms• Write 3 Comprehension questions• Gmail : Drhillteach@gmail.com

Example

Review of rules

• Ionic make ions of Nobel gases – ionic crystal• Covalent share by overlap – shaped molecule,

macro molecule

Mass conservation – R&V

• Mass conserved because atoms don’t disappear or are appear

• Validity – fair and correct procedure that measures what you think

• Reliability – quality of answer, how repeatable• Need to know dependant and independent.