Checkpoint Science 0846 — Practice Paper 1

Working: match each organ to its job.

1. kidneys — filter waste from the blood.
2. lungs — used to breathe (take in oxygen).
3. heart — main organ of the circulatory system (pumps blood).
4. brain — main organ of the nervous system (controls the body).
5. stomach — an organ of the digestive system (digests food).

Strand: Biology — human organs & systems (0846 P1)

Framework LO: 6Bh3

Working:

1. Friction is a force (it acts between surfaces that rub together).
2. It acts against motion, so it makes a moving object slow down.
3. Friction caused by air is air resistance.

Strand: Physics — forces / friction (0846 P1)

Framework LO: 6Pf4

Working: a change is reversible if you can get the starting material back (melt/freeze, dissolve/evaporate). Burning and baking make new materials you cannot turn back — they are irreversible.

Strand: Materials — reversible vs irreversible changes (0846 P1)

Framework LO: 6Cc1

Working: only magnetic metals — mainly iron and steel (which contains iron) — are attracted to a magnet. Copper, plastic and wood are not.

Strand: Materials — magnetic materials (0846 P1)

Framework LO: 4Pm5

Working: on a food pyramid, fats, oils and sweets sit at the very top (the smallest part), so we should eat the least of them.

Strand: Biology — healthy diet (0846 P1)

Framework LO: 3Bh4

Working:

1. Liquid → water vapour (a gas) is evaporation.
2. Water vapour cooling to droplets is condensation.

These two drive the water cycle.

Strand: Materials / Earth — the water cycle (0846 P1)

Framework LO: 5Cs1

Working:

1. A food chain starts with a producer (a green plant that makes its own food).
2. An animal that hunts and eats others is a predator.
3. The animal that is hunted and eaten is the prey.

Strand: Biology — food chains (0846 P1)

Framework LO: 6Be5

Working: a food chain follows who eats whom, starting with the producer: grass → grasshopper (eats grass) → frog (eats grasshopper) → snake (eats frog). The arrows show the flow of energy.

Strand: Biology — food chains / energy flow (0846 P1)

Framework LO: 6Be6

Working: as temperature rises (20→80 °C) the mass dissolved rises (200→320 g), so it increases. Warmer water dissolves more.

Framework LO: 6Eo6

Working / model answer: Repeating measurements makes the results more reliable and lets you check that the readings agree. It also helps you spot a measurement that went wrong (an anomaly).

Strand: Scientific enquiry — reliability (0846). Note: ‘to make it more accurate’ alone is not enough — repeating checks reliability. Keyword auto-graded, model answer shown.

Framework LO: 6Eo2

Working: in a fair test you change only ONE thing (the towel) and keep everything else the same. So she must pour the same amount of water on each towel; only the towel should change.

Strand: Scientific enquiry — fair testing (0846 P1)

Framework LO: 6Ep6

Working: the particles in a solid are packed closely together, so vibrations (sound) pass from one particle to the next most quickly. Sound is slowest in gases like air, where particles are far apart. So Sara is correct.

Strand: Physics — sound (0846)

Framework LO: 4Ps2

Working:

1. A solid has a fixed shape and a fixed volume.
2. A liquid takes the container's shape but keeps the same volume.
3. A gas spreads out to fill all the space available.

Strand: Materials — states of matter (0846)

Framework LO: 4Cs1

Working: For a lamp to light, the circuit must be a complete loop so that current can flow all the way round. The switch in the diagram is open, leaving a gap — so the circuit is broken, no current flows, and the lamp stays off. Closing the switch would complete the circuit.

Strand: Physics — electricity / complete circuits (0846 P1)

Framework LO: 6Pm4

Working: A food chain always starts with a producer — a green plant that makes its own food. Here that is the grass. The arrows then show energy passing to each animal that eats the one before it.

Strand: Biology — food chains (0846 P1)

Framework LO: 6Be4