Year 9 Science Revision

Which of the following can be said about the conservation of mass?

• Matter cannot be created or destroyed.

• Matter cannot change forms.

• Matter can be created, but never destroyed.

• Matter cannot be created, only destroyed.

What chemical is responsible for photosynthesis?

• Carbon Dioxide

• Chlorophyll

• Carbon Monoxide

• Glucose

Which of the following represents the word equation for cellular respiration?

• Carbon Dioxide + Water --> Oxygen + Glucose

• Oxygen + Water --> Carbon Dioxide + Glucose

• Carbon Dioxide + Oxygen --> Water + Glucose

• Oxygen + Glucose --> Carbon Dioxide + Water

Which numbers are on the pH scale?

• 0 to 14

• 1 to 14

• 1 to 15

• 1 to 16

On the pH scale, bases are which numbers?

• 1 to 14

• 1 to 9

• 1 to 6

• 8 to 14

An acid-base reaction is known as a...

• Neutralisation Reaction

• Fission Reaction

• Emotional Reaction

• Endothermic Reaction

A neutralisation reaction has ________ as a product.

• Carbon

• Aluminium Trioxide

• Salt

• Hydrogen Sulphide

Isotopes are formed when an element has a different number of _______.

• Electrons

• Protons

• Lepton

• Neutrons

Nuclear decay....

• Only happens in a nuclear reactor.

• Occurs when atoms are stable.

• Occurs when atoms are unstable.

• Occurs when atoms join and release energy.