P6 Cambridge Lower Primary Science

The smallest unit of life is:

• Atom

• Molecule

• Cell

• Tissue

In plant cells, photosynthesis takes place in the:

• Cytoplasm

• Vacuole

• Chloroplast

• Cell wall

Which specialized cell carries oxygen in the blood?

• Neuron

• Red blood cell

• Ciliated cell

• Root hair cell

Which feature makes root hair cells efficient at absorbing water?

• Having a large nucleus

• Having long, thin projections

• Containing chloroplasts

• Having cilia

What is the function of cilia?

• Absorb sunlight

• Sweep mucus and dust out of the airways

• Carry oxygen

• Store nutrients

Which of the following is a mixture?

• Sodium chloride (NaCl)

• Air

• Water (H₂O)

• Carbon dioxide (CO₂)

Which element has the symbol "K"?

• Krypton

• Potassium

• Calcium

• Copper

The pH of pure water is:

• 0

• 7

• 14

• 3

What type of energy does a stretched rubber band have?

• Kinetic energy

• Chemical energy

• Elastic potential energy

• Sound energy

A car engine converts chemical energy from fuel mainly into:

• Kinetic energy and heat energy

• Light energy and sound energy

• Gravitational energy and heat energy

• Elastic potential energy and sound energy