Science IGCSE Grade 8

Which of the following is NOT a type of mixture?

• Homogenous

• Heterogenous

• Solution

• Compound

What is the smallest particle of an element that retains the properties of that element called?

• Molecule

• Atom

• Compound

• Nucleus

Which of the following is a unit of force?

• Newton

• Watt

• Joule

• Kilogram

Which of the following is a non-renewable resource?

• Solar power

• Wind power

• Coal

• Hydroelectric pwoer

What is the process by which plants convert sunlight into energy?

• Photosynthesis

• Respiration

• Fermentation

• Transpiration

Which of the following is the correct formula for water?

• H2SO4

• H2O2

• CO2

• H2O

What is the difference between kinetic and potential energy?

• Kinetic energy is energy at rest, while potential energy is energy in motion.

• Kinetic energy is energy in motion, while potential energy is energy at rest.

• Kinetic energy is the energy stored in chemical bonds, while potential energy is the energy released by chemical reactions.

• Kinetic energy and potential energy are the same thing.

What is the difference between a physical and chemical change?

• Physical changes only affect the physical properties of a substance, while chemical changes affect the chemical properties of a substance.

• Physical changes only affect the chemical properties of a substance, while chemical changes affect the physical properties of a substance.

• Physical changes and chemical changes are the same thing.

• Physical changes affect both the physical and chemical properties of a substance, while chemical changes only affect the chemical properties of a substance.

What is the difference between an acid and a base?

• Acids are sour, while bases are bitter.

• Acids are bitter, while bases are sour.

• Acids are proton donors, while bases are proton acceptors.

• Acids are proton acceptors, while bases are proton donors.

Which of the following is a type of electromagnetic wave?

• Sound wave

• X-ray

• Water wave

• Seismic wave