Year 7 Science Vocabulary Review

These flashcards will aid students in reviewing key terms and concepts in Year 7 Science.

What does the term 'absorb' mean in science?

To soak up.

What is an 'acid'?

A substance which contains hydrogen particles and has a pH lower than 7; the chemical opposite of an alkali.

Define 'alkali'.

A substance that contains hydroxide particles and has a pH higher than 7; the chemical opposite of an acid.

What is 'air resistance'?

The force on a moving object caused by pushing against particles in the air.

What is a 'battery'?

A component that changes chemical to electrical energy in a circuit; made from two or more cells in series.

What is a 'carnivore'?

Consumers that eat other animals.

What is meant by 'change of state'?

The changes between different states of matter.

What do we call the process of changes from a gas to a liquid?

Condensation.

Define 'current' in a circuit.

The flow of electrons in a circuit.

What is 'evaporation'?

The process of changing from a liquid to a gas at a temperature below boiling point.

What does 'fragile' refer to?

Something that breaks easily with a snap.

Define 'insulator'.

A substance that does not conduct heat or electricity.

What is the 'pH scale'?

A scale that measures the strength of acids and alkalis.

What does 'photosynthesis' mean?

The process by which plants use chlorophyll to convert sunlight into energy.

What is a 'producer' in a food chain?

The first organism in a food chain.

What is 'reproduction'?

The ability of organisms to produce young.

What is 'virus'?

An extremely small structure made of a protein coat surrounding RNA (or DNA), which can invade cells and cause them to produce new viruses.