Why is it important to improve the energy efficiency of household devices such as lamps?

Name a human activity that has led to global warming

Explain how deforestation can contribute to the increase in atmospheric CO2

name an instrument used to measure time

The element indium (In) is used in phones. At current usage rates indium will be used up in 50 years. Suggest how humans could sustain levels of this element for future generations

A box has mass 128g and volume 64ml what is the density of the box?

A student carried out an experiment to investigate the reaction between an acid and a base. A pH indicator and a thermometer were used to monitor changes in pH and temperature during the reaction. Name a pH indicator the student used.

Calculate the speed of a car that travels 50km in 2 hours

State 2 reasons why the recycling of plastics is considered to be of benefit to the environment

Name an unwanted form of energy produced by lightbulbs

A box has length 8cm, width 2cm and height 4cm. What is the volume of the box

Describe the difference between mass and weight?