Grade 7e Eoye Science revision

Atoms are made of

What is the charge of a proton

• Positive

• Negative

• Neutral

Where are electrons not found

• Nucleus

• Electron Shells

What is the atomic number

• The amount of protons in an atom

• A way to label atoms

• The amount of neutrons in an atom

• How old was the person that discovered the type of atom

What is a mixture

• A mixture is a substance made by combining two or more different materials without a chemical reaction.
• A mixture is a substance made by separating two or more different materials without a chemical reaction.
• A mixture is a substance made by combining two or more different materials through a chemical reaction.
• A mixture is a substance made by combining two or more similar materials without a chemical reaction.

What is a homogeneous

• A substance with varying composition throughout
• A mixture with inconsistent properties
• A substance or mixture that has uniform composition throughout.
• A compound that changes state easily

What is a heterogeneous mixture

• A heterogeneous mixture is a type of mixture in which the components are not uniformly distributed and can be distinguished from one another.
• A heterogeneous mixture is a type of mixture in which the components are separated into layers.
• A heterogeneous mixture is a type of mixture in which the components are evenly mixed.
• A homogeneous mixture is a type of mixture in which the components are uniformly distributed.

What is a solution

• A solution is a solid substance dissolved in a liquid
• A solution is a mixture of two immiscible substances
• A solution is a substance that cannot be separated into its components
• A solution is a homogeneous mixture composed of two or more substances.

What is an impurity in a substance

• A substance that evaporates quickly
• A foreign substance mixed in with the main substance
• A substance that enhances the main substance
• A pure substance without any impurities

What does reactivity means in the context of metals.

• Ease of reaction with other substances
• Color of the metal
• Resistance to corrosion
• Ability to conduct electricity