Acids – GCSE Chemistry Practice Questions Downloads Introduction What are Acids and Base? ACIDS An Acid is a substance that releases H+ ions in water. Acids usually have sour taste and can turn blue litmus paper into red. Examples: Base A base is a substance that releases OH⁻ (hydroxide) ions in water. Bases usually have…
Radioactivity Dangers and Medicines – GCSE Physics Practice Questions Downloads Introduction Radioactivity means a process in which unstable atom nuclei spontaneously emit energy in order to gain stability. Radiations are primarily of three types – Alpha(α) Radiations, Beta(β) Radiations and Gamma(γ) Radiations. There are many medicinal applications of Radioactivity. Also, the small amount of radiation…
Astronomy – GCSE Physics Practice Questions Downloads Introduction to Astronomy The Astronomy is branch of Science that deals with the study of Astronomical objects like Stars, Planets and Asteroids etc. We can also say that the study of the objects that are beyond Earth’s atmosphere and are present in far away galaxies is known as…
Radioactivity – GCSE Physics Practice Questions Downloads What is Radioactivity? An Atom is the basic unit of matter. Atom contains Electrons(negatively charged), Protons(positively charged) and Neutrons(neutral) in such a way that the protons and neutrons are present in nucleus and electrons revolve around them in orbitals. The nucleus is present in center that contributes for…
Heat Energy Changes – GCSE Chemistry Practice Questions Downloads Introduction Heat is the form of energy that flows from a hotter place to a cooler place, and in chemical reactions, the heat energy is absorbed or released based on the type of reaction. Thus, in Chemistry, the change in heat energy refers to the transfer…
Electrolytic Process – GCSE Chemistry Practice Questions Downloads Introduction The Electrolytic processes are basically a method in which we use electricity to decompose a ionic compound/solution into its constituent elements. The apparatus in which the process occurs is called Electrolytic cell, it involves electrodes, battery and an electrolyte(ionic compound). The process of Electrolysis is used…
Probability – GCSE Maths Practice Questions Downloads Introduction Probability is a branch of mathematics that deals with calculating the likelihood of events occurring. Probability helps us measure and predict the chances of events happening in the real world like- What is a Probability? Probability is a measure of how likely an event is to occur….
Similarity – GCSE Maths Practice Questions Downloads Introduction Similarity of shapes means that the shapes are same but they have different size, with equal corresponding angles and proportional sides. Concept of Similarity is applied in many places like linear algebra and data analysis to measure how much the two objects or datasets are similar. Concept…
Ratios in Algebra – GCSE Maths Practice Questions Downloads Introduction Ratios are number of one thing compared to another thing. (how much one quantity is present with respect to other) Simplification: (Common Factor : 3) If we multiply or divide the ratio’s numbers the ratios still remains the same From this simplification using common factor…
Red-Shift: Origin of the Universe – GCSE Physics Practice Questions Downloads Introduction In Astronomy, redshift is used to describe celestial objects and distant galaxies that are moving away from Earth. Redshift is a phenomenon where wavelength of light emitted from a distant galaxy that is moving away from is shifted towards the red end of…