Year 8 Pre-Test

What is the basic unit of all living things?

• Atoms

• Cells

• Organs

• Molecules

Which of the following is a characteristic of multicellular organisms?

• They contain only one type of cell.

• They do not reproduce.

• They have systems of organs with specialised functions.

• They cannot survive without sunlight.

What is the main function of the cell membrane?

• To produce energy

• To control the movement of substances in and out of the cell

• To store genetic information

• To protect the nucleus

Which organelle is responsible for energy production in a cell?

• Nucleus

• Mitochondria

• Ribosome

• Cell wall

In which organ system would you find the heart and blood vessels?

• Digestive system

• Circulatory system

• Nervous system

• Respiratory system

What happens to the particles in a solid when it is heated?

• They move closer together.

• They start vibrating faster.

• They become larger.

• They stop moving.

What is a characteristic of gases compared to liquids and solids?

• They have a fixed shape.

• Their particles move freely and quickly.

• Their particles are tightly packed.

• They have a definite volume.

Which state of matter has particles that are arranged in a fixed pattern but can vibrate?

• Solid

• Liquid

• Gas

• Plasma

What is an example of a physical change?

• Burning paper

• Melting ice

• Cooking an egg

• Rusting metal

What best describes a compound?

• A single element with one type of particle

• A mixture of substances that do not chemically combine

• A substance made of two or more elements chemically bonded together

• A group of molecules that do not interact