Answer each question carefully. You can review your selections before submitting. You can also enable a timer to challenge yourself!
Q1:Why is plastic used for packaging food?
Q2:What does it mean if a material is absorbent?
Q3:What material is used to make chalk?
Q4:What property of materials allows them to float?
Q5:What is condensation?
Q6:What is the best conductor of electricity?
Q7:Which material is best for making lenses?
Q8:Which of these is a physical change?
Q9:Which material is biodegradable?
Q10:Which of these materials is magnetic?
Q11:Why does metal expand when heated?
Q12:Why is clay used for pottery?