Name two gases exchanged through the stoma.

Describe how a sodium atom and a chlorine atom become charged ions.

Describe how ions are held together in an ionic compound.

Decide if each sentence is true or false.

• Thermal energy always transfers from hotter objects to colder objects.

• Heat dissipation happens when thermal energy transfers from a hotter region to a colder region.

• A liquid is a good thermal energy conductor.

• Heat is the word used to measure how hot an object is.

• Convection happens in liquids and gases only.

What is the independent variable of this experiment?

What is the dependent variable of this experiment

• Rate of photosynthesis

• Rate of reaction

• Rate of water loss

• Rate of diffusion

Which of the following best describe the experiment above.

• The spring balance in shoot Y will decrease.

• The spring balance in shoot Y will remain the same.

• The spring balance in shoot X will remain the same.

• The spring balance in shoot X will increase.

Tick all the control variables of this experiment.

• The type of plant

• Number of leaves

• Number of leaves

• Surrounding temperature

Picture showing metals reacts with copper nitrate.

Which beaker shows highest temperature change?

• A

• B

• C

• D

The picture showing metals reacting with copper nitrate.
Which of the metals will not show temperature change.

• A

• B

• C

• D