Free AQA GCSE Combined Science (Synergy)
Practice Paper

Active transport moves substances:

1. Against a concentration gradient, using energy
2. Down a concentration gradient, without energy
3. Only in dead cells
4. Only across a cell wall

What causes the pressure exerted by a gas on the walls of its container?

1. A) Gas molecules pushing each other apart and pressing outward
2. B) Gas molecules colliding with the container walls and exerting a force
3. C) Gas molecules sticking to the walls and pulling them inward
4. D) Gravity pulling gas molecules downward onto the base of the container

Water (H₂O) is an example of a:

1. Compound
2. Element
3. Mixture
4. Single atom

Which two particles are found in the nucleus of an atom?

1. Protons and neutrons
2. Protons and electrons
3. Electrons and neutrons
4. Only electrons

Which structure controls what enters and leaves an animal cell?

1. The cell membrane
2. The cell wall
3. The nucleus
4. The vacuole

Electric current is the rate of flow of:

1. Electric charge
2. Energy only
3. Mass
4. Heat

Compared with a solid, the particles in a gas are:

1. Far apart and move quickly in random directions
2. Closely packed
3. Fixed in place
4. In a regular pattern

An element is a substance made of:

1. Only one type of atom
2. Two or more elements chemically joined
3. A mixture of atoms
4. Only molecules of water