G8 Revision

​Grade 8 Revision

​Identify the:

• Independent variable

• Dependent and how it is measured

• Control variables

• Predict the effect of changing air temperature to the rate of transpiration.

​Variables in an experiment

​How can Pierre make the reaction go faster?

What are the safety hazards in his experiment?

What safety measures/precautions should he do to avoid this?

Complete the labels on the diagram.

​

​Human excretory(renal) system

Complete the diagram

​Plant transport system

​Name each of these processes and write a short description for each process.

A:

B:

C:

D:

​The Carbon cycle

​Look at the diagram showing 2 plates moving towards each other.

What are formed when during this event?

​Tectonics

​Look at the diagram showing plates moving apart.

What are formed when this event occur?

​Tectonics

​Write the electronic structure of the following elements:

Ne

Na

Al

Sodium (Na) and Chlorine (Cl) forms an ionic bond.

What is ionic bonding?

​Periodic table

Water compound holds hydrogen and oxygen atoms together in a bond.

What is this bond?

Explain your answer.

​

​Covalent bond