Y9 Science 2023 End of Year Exam Practise

Which of the following is true about the atom?

• Electrons and protons are of equal mass and size.

• Atoms can have electrons added to the nucleus.   

• Atoms that have more protons than neutrons will be positively charged.

• The nucleus of an atom will always contain at least one proton.

An anion will:  

• Have more protons than neutrons.

• Have less protons than electrons.  

• Have a positive charge.

• Have at least one neutron more than the number of electrons.

Which of the following types of chemical reactions does the graph best represent?

• Exothermic reaction

• Endothermic reaction

• Acid-base reaction

• Oxygen-metal reaction

A product of a neutralisation reaction includes:

• Water

• Hydrogen gas

• Sodium

• A strong base or a strong acid

When burning hydrocarbons:

• Nitrous oxide is produced

• Oxygen is consumed

• Carbon is produced

• Water is consumed

Which of the following best describes what an electric current (AKA, electricity) is?

• Movement of electrons

• Power used in electrical appliances

• Energy that can be generated through movement

• A device that can run electricity through it

On a casual clothes day, Crow, Poppy and Bee are conducting a prac, investigating how the concentration of hydrochloric acid effects the speed of which iron is dissolved.

What equipment and/or clothing should they be wearing to be considered "lab-safe"?

Which of the following best describes 'alternating current'?

• Electrons reversing direction multiple times

• When a generator changes the direction at which it spins

• Electrons travelling in a single direction

• When a generator rotates in a single direction

A material that inhibits the movement of an electrical current is known as:

• An insulator

• A conductor

• A batery

• A load

A device that can take an electrical current and transform it into another form of energy is known as:

• An insulator

• A conductor

• A battery

• A load