MEDIUM
Lower Secondary Stage 7
IMPORTANT
Earn 100

Methane can exist in all three states of matter. Draw a diagram to show the arrangement of particles in methane when it is a gas.

Important Questions on Acids and Alkalis

EASY
Lower Secondary Stage 7
IMPORTANT
Cambridge Lower Secondary Science Stage 7 : Student's Book>Chapter 7 - Acids and Alkalis>Exercise 1>Q 1
Why is it important for some chemicals to have hazard symbols on them?
EASY
Lower Secondary Stage 7
IMPORTANT
Cambridge Lower Secondary Science Stage 7 : Student's Book>Chapter 7 - Acids and Alkalis>Exercise 1>Q 2
Why do scientists use symbols instead of writing words?
EASY
Lower Secondary Stage 7
IMPORTANT
Cambridge Lower Secondary Science Stage 7 : Student's Book>Chapter 7 - Acids and Alkalis>Exercise 1>Q 3
A chemical could cause burns to the skin and eyes if not used safely. What hazard symbol will you put on this chemical?
EASY
Lower Secondary Stage 7
IMPORTANT
Cambridge Lower Secondary Science Stage 7 : Student's Book>Chapter 7 - Acids and Alkalis>Exercise 1>Q 4
A chemical could cause the skin to become red and itchy if it is in contact with the skin. What hazard symbol would you use for this chemical?
EASY
Lower Secondary Stage 7
IMPORTANT
Cambridge Lower Secondary Science Stage 7 : Student's Book>Chapter 7 - Acids and Alkalis>End of chapter review>Q 1

State the meaning of the following hazard symbol:

Question Image 

EASY
Lower Secondary Stage 7
IMPORTANT
Cambridge Lower Secondary Science Stage 7 : Student's Book>Chapter 7 - Acids and Alkalis>End of chapter review>Q 1

State the meaning of the following hazard symbol:

Question Image 

MEDIUM
Lower Secondary Stage 7
IMPORTANT
Cambridge Lower Secondary Science Stage 7 : Student's Book>Chapter 7 - Acids and Alkalis>End of stage review>Q 4

Question Image 

Usman buys a new saucepan. It is made of aluminium with a plastic handle.

Suggest and explain two reasons why aluminium was chosen for the pan.

MEDIUM
Lower Secondary Stage 7
IMPORTANT
Cambridge Lower Secondary Science Stage 7 : Student's Book>Chapter 7 - Acids and Alkalis>End of stage review>Q 4

Question Image 

Usman buys a new saucepan. It is made of aluminium with a plastic handle.

Suggest one reason why plastic was chosen for the handle.